Code Coverage |
||||||||||
Lines |
Functions and Methods |
Classes and Traits |
||||||||
| Total | |
69.52% |
935 / 1345 |
|
38.74% |
74 / 191 |
CRAP | |
0.00% |
0 / 1 |
| Database | |
69.52% |
935 / 1345 |
|
38.74% |
74 / 191 |
6699.61 | |
0.00% |
0 / 1 |
| __construct | |
95.65% |
44 / 46 |
|
0.00% |
0 / 1 |
14 | |||
| initConnection | |
90.91% |
10 / 11 |
|
0.00% |
0 / 1 |
2.00 | |||
| open | n/a |
0 / 0 |
n/a |
0 / 0 |
0 | |||||
| getAttributes | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| setLogger | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| getServerInfo | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| tablePrefix | |
100.00% |
9 / 9 |
|
100.00% |
1 / 1 |
2 | |||
| dbSchema | |
100.00% |
14 / 14 |
|
100.00% |
1 / 1 |
5 | |||
| getLBInfo | |
100.00% |
5 / 5 |
|
100.00% |
1 / 1 |
3 | |||
| setLBInfo | |
85.71% |
6 / 7 |
|
0.00% |
0 / 1 |
4.05 | |||
| lastDoneWrites | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
6 | |||
| sessionLocksPending | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| getTransactionRoundId | |
100.00% |
4 / 4 |
|
100.00% |
1 / 1 |
3 | |||
| isOpen | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| getDomainID | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| strencode | n/a |
0 / 0 |
n/a |
0 / 0 |
0 | |||||
| installErrorHandler | |
0.00% |
0 / 3 |
|
0.00% |
0 / 1 |
2 | |||
| restoreErrorHandler | |
0.00% |
0 / 4 |
|
0.00% |
0 / 1 |
6 | |||
| getLastPHPError | |
0.00% |
0 / 5 |
|
0.00% |
0 / 1 |
6 | |||
| connectionErrorLogger | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| getLogContext | |
100.00% |
8 / 8 |
|
100.00% |
1 / 1 |
1 | |||
| close | |
84.21% |
16 / 19 |
|
0.00% |
0 / 1 |
6.14 | |||
| assertHasConnectionHandle | |
50.00% |
1 / 2 |
|
0.00% |
0 / 1 |
2.50 | |||
| closeConnection | n/a |
0 / 0 |
n/a |
0 / 0 |
0 | |||||
| doSingleStatementQuery | n/a |
0 / 0 |
n/a |
0 / 0 |
0 | |||||
| hasPermanentTable | |
100.00% |
8 / 8 |
|
100.00% |
1 / 1 |
4 | |||
| registerTempTables | |
100.00% |
14 / 14 |
|
100.00% |
1 / 1 |
4 | |||
| query | |
100.00% |
14 / 14 |
|
100.00% |
1 / 1 |
5 | |||
| executeQuery | |
96.55% |
28 / 29 |
|
0.00% |
0 / 1 |
10 | |||
| attemptQuery | |
84.38% |
54 / 64 |
|
0.00% |
0 / 1 |
11.46 | |||
| handleErroredQuery | |
50.00% |
16 / 32 |
|
0.00% |
0 / 1 |
22.50 | |||
| makeCommentedSql | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
1 | |||
| beginIfImplied | |
100.00% |
6 / 6 |
|
100.00% |
1 / 1 |
4 | |||
| assertQueryIsCurrentlyAllowed | |
94.44% |
17 / 18 |
|
0.00% |
0 / 1 |
5.00 | |||
| assessConnectionLoss | |
0.00% |
0 / 38 |
|
0.00% |
0 / 1 |
380 | |||
| handleSessionLossPreconnect | |
100.00% |
6 / 6 |
|
100.00% |
1 / 1 |
1 | |||
| doHandleSessionLossPreconnect | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| isQueryTimeoutError | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| reportQueryError | |
33.33% |
2 / 6 |
|
0.00% |
0 / 1 |
3.19 | |||
| getQueryExceptionAndLog | |
100.00% |
13 / 13 |
|
100.00% |
1 / 1 |
1 | |||
| getQueryException | |
60.00% |
3 / 5 |
|
0.00% |
0 / 1 |
3.58 | |||
| newExceptionAfterConnectError | |
0.00% |
0 / 11 |
|
0.00% |
0 / 1 |
2 | |||
| newSelectQueryBuilder | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| newUnionQueryBuilder | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| newUpdateQueryBuilder | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| newDeleteQueryBuilder | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| newInsertQueryBuilder | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| newReplaceQueryBuilder | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| selectField | |
69.23% |
9 / 13 |
|
0.00% |
0 / 1 |
7.05 | |||
| selectFieldValues | |
75.00% |
9 / 12 |
|
0.00% |
0 / 1 |
5.39 | |||
| select | |
100.00% |
7 / 7 |
|
100.00% |
1 / 1 |
2 | |||
| selectRow | |
0.00% |
0 / 8 |
|
0.00% |
0 / 1 |
12 | |||
| estimateRowCount | |
0.00% |
0 / 9 |
|
0.00% |
0 / 1 |
30 | |||
| selectRowCount | |
92.59% |
25 / 27 |
|
0.00% |
0 / 1 |
7.02 | |||
| lockForUpdate | |
50.00% |
4 / 8 |
|
0.00% |
0 / 1 |
4.12 | |||
| fieldExists | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
1 | |||
| tableExists | n/a |
0 / 0 |
n/a |
0 / 0 |
0 | |||||
| indexExists | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
1 | |||
| indexUnique | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
2 | |||
| indexInfo | n/a |
0 / 0 |
n/a |
0 / 0 |
0 | |||||
| insert | |
71.43% |
5 / 7 |
|
0.00% |
0 / 1 |
3.21 | |||
| checkInsertWarnings | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| update | |
100.00% |
3 / 3 |
|
100.00% |
1 / 1 |
1 | |||
| databasesAreIndependent | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| selectDomain | |
50.00% |
3 / 6 |
|
0.00% |
0 / 1 |
2.50 | |||
| doSelectDomain | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
1 | |||
| getDBname | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| getServer | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| getServerName | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| addQuotes | |
72.73% |
8 / 11 |
|
0.00% |
0 / 1 |
6.73 | |||
| expr | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| andExpr | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| orExpr | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| replace | |
81.82% |
18 / 22 |
|
0.00% |
0 / 1 |
5.15 | |||
| upsert | |
93.94% |
62 / 66 |
|
0.00% |
0 / 1 |
10.02 | |||
| getInsertIdColumnForUpsert | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| getValueTypesForWithClause | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| deleteJoin | |
100.00% |
3 / 3 |
|
100.00% |
1 / 1 |
1 | |||
| delete | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
1 | |||
| insertSelect | |
100.00% |
25 / 25 |
|
100.00% |
1 / 1 |
3 | |||
| isInsertSelectSafe | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| doInsertSelectGeneric | |
90.00% |
27 / 30 |
|
0.00% |
0 / 1 |
7.05 | |||
| doInsertSelectNative | |
100.00% |
17 / 17 |
|
100.00% |
1 / 1 |
1 | |||
| isConnectionError | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| isKnownStatementRollbackError | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| serverIsReadOnly | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| onTransactionResolution | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| onTransactionCommitOrIdle | |
87.50% |
7 / 8 |
|
0.00% |
0 / 1 |
5.05 | |||
| onTransactionPreCommitOrIdle | |
71.43% |
10 / 14 |
|
0.00% |
0 / 1 |
6.84 | |||
| onAtomicSectionCancel | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| setTransactionListener | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| setTrxEndCallbackSuppression | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| runOnTransactionIdleCallbacks | |
73.91% |
17 / 23 |
|
0.00% |
0 / 1 |
7.87 | |||
| runTransactionListenerCallbacks | |
42.86% |
3 / 7 |
|
0.00% |
0 / 1 |
6.99 | |||
| runTransactionPostCommitCallbacks | |
83.33% |
5 / 6 |
|
0.00% |
0 / 1 |
2.02 | |||
| runTransactionPostRollbackCallbacks | |
100.00% |
3 / 3 |
|
100.00% |
1 / 1 |
1 | |||
| startAtomic | |
80.77% |
21 / 26 |
|
0.00% |
0 / 1 |
7.35 | |||
| endAtomic | |
83.33% |
15 / 18 |
|
0.00% |
0 / 1 |
6.17 | |||
| cancelAtomic | |
97.73% |
43 / 44 |
|
0.00% |
0 / 1 |
6 | |||
| doAtomicSection | |
100.00% |
8 / 8 |
|
100.00% |
1 / 1 |
3 | |||
| begin | |
65.00% |
13 / 20 |
|
0.00% |
0 / 1 |
7.54 | |||
| doBegin | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
1 | |||
| commit | |
95.00% |
19 / 20 |
|
0.00% |
0 / 1 |
7 | |||
| rollback | |
88.57% |
31 / 35 |
|
0.00% |
0 / 1 |
9.12 | |||
| setTransactionManager | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| flushSession | |
60.00% |
18 / 30 |
|
0.00% |
0 / 1 |
12.10 | |||
| doFlushSession | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| flushSnapshot | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
1 | |||
| duplicateTableStructure | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| listTables | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| affectedRows | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
1 | |||
| insertId | |
100.00% |
5 / 5 |
|
100.00% |
1 / 1 |
3 | |||
| lastInsertId | n/a |
0 / 0 |
n/a |
0 / 0 |
0 | |||||
| ping | |
0.00% |
0 / 12 |
|
0.00% |
0 / 1 |
12 | |||
| replaceLostConnection | |
69.44% |
25 / 36 |
|
0.00% |
0 / 1 |
3.26 | |||
| getCacheSetOptions | |
0.00% |
0 / 12 |
|
0.00% |
0 / 1 |
56 | |||
| encodeBlob | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| decodeBlob | |
0.00% |
0 / 3 |
|
0.00% |
0 / 1 |
6 | |||
| setSessionOptions | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| sourceFile | |
0.00% |
0 / 15 |
|
0.00% |
0 / 1 |
12 | |||
| sourceStream | |
0.00% |
0 / 35 |
|
0.00% |
0 / 1 |
240 | |||
| streamStatementEnd | |
100.00% |
10 / 10 |
|
100.00% |
1 / 1 |
3 | |||
| lockIsFree | |
100.00% |
4 / 4 |
|
100.00% |
1 / 1 |
2 | |||
| doLockIsFree | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| lock | |
50.00% |
8 / 16 |
|
0.00% |
0 / 1 |
4.12 | |||
| doLock | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| unlock | |
35.71% |
5 / 14 |
|
0.00% |
0 / 1 |
5.39 | |||
| doUnlock | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| getScopedLockAndFlush | |
88.89% |
16 / 18 |
|
0.00% |
0 / 1 |
5.03 | |||
| dropTable | |
100.00% |
10 / 10 |
|
100.00% |
1 / 1 |
2 | |||
| truncateTable | |
0.00% |
0 / 3 |
|
0.00% |
0 / 1 |
2 | |||
| isReadOnly | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| getReadOnlyReason | |
85.71% |
6 / 7 |
|
0.00% |
0 / 1 |
3.03 | |||
| getBindingHandle | |
33.33% |
2 / 6 |
|
0.00% |
0 / 1 |
3.19 | |||
| commenceCriticalSection | |
75.00% |
18 / 24 |
|
0.00% |
0 / 1 |
4.25 | |||
| completeCriticalSection | |
63.64% |
7 / 11 |
|
0.00% |
0 / 1 |
6.20 | |||
| __toString | |
87.50% |
7 / 8 |
|
0.00% |
0 / 1 |
3.02 | |||
| __clone | |
0.00% |
0 / 20 |
|
0.00% |
0 / 1 |
6 | |||
| __sleep | |
0.00% |
0 / 2 |
|
0.00% |
0 / 1 |
2 | |||
| __destruct | |
81.82% |
9 / 11 |
|
0.00% |
0 / 1 |
4.10 | |||
| setFlag | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| clearFlag | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| restoreFlags | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| getFlag | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| trxLevel | |
66.67% |
2 / 3 |
|
0.00% |
0 / 1 |
2.15 | |||
| trxTimestamp | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| trxStatus | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| writesPending | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| writesOrCallbacksPending | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| pendingWriteQueryDuration | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| pendingWriteCallers | |
66.67% |
2 / 3 |
|
0.00% |
0 / 1 |
2.15 | |||
| pendingWriteAndCallbackCallers | |
100.00% |
3 / 3 |
|
100.00% |
1 / 1 |
2 | |||
| runOnTransactionPreCommitCallbacks | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| explicitTrxActive | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| implicitOrderby | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| selectSQLText | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| buildComparison | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| makeList | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| makeWhereFrom2d | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| factorConds | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| bitNot | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| bitAnd | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| bitOr | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| buildConcat | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| buildGreatest | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| buildLeast | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| buildSubstring | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| buildStringCast | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| buildIntegerCast | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| tableName | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| tableNames | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| tableNamesN | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| addIdentifierQuotes | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| isQuotedIdentifier | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| buildLike | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| anyChar | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| anyString | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| limitResult | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| unionSupportsOrderAndLimit | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| unionQueries | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| conditional | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| strreplace | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| timestamp | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| timestampOrNull | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| getInfinity | |
0.00% |
0 / 1 |
|
0.00% |
0 / 1 |
2 | |||
| encodeExpiry | |
0.00% |
0 / 1 |
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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | */ |
| 20 | namespace Wikimedia\Rdbms; |
| 21 | |
| 22 | use InvalidArgumentException; |
| 23 | use LogicException; |
| 24 | use Psr\Log\LoggerAwareInterface; |
| 25 | use Psr\Log\LoggerInterface; |
| 26 | use Psr\Log\NullLogger; |
| 27 | use RuntimeException; |
| 28 | use Stringable; |
| 29 | use Throwable; |
| 30 | use Wikimedia\AtEase\AtEase; |
| 31 | use Wikimedia\Rdbms\Database\DatabaseFlags; |
| 32 | use Wikimedia\Rdbms\Platform\SQLPlatform; |
| 33 | use Wikimedia\Rdbms\Replication\ReplicationReporter; |
| 34 | use Wikimedia\RequestTimeout\CriticalSectionProvider; |
| 35 | use Wikimedia\RequestTimeout\CriticalSectionScope; |
| 36 | use Wikimedia\ScopedCallback; |
| 37 | |
| 38 | /** |
| 39 | * Relational database abstraction object |
| 40 | * |
| 41 | * @ingroup Database |
| 42 | * @since 1.28 |
| 43 | */ |
| 44 | abstract class Database implements Stringable, IDatabaseForOwner, IMaintainableDatabase, LoggerAwareInterface { |
| 45 | /** @var CriticalSectionProvider|null */ |
| 46 | protected $csProvider; |
| 47 | /** @var LoggerInterface */ |
| 48 | protected $logger; |
| 49 | /** @var callable Error logging callback */ |
| 50 | protected $errorLogger; |
| 51 | /** @var callable Deprecation logging callback */ |
| 52 | protected $deprecationLogger; |
| 53 | /** @var callable|null */ |
| 54 | protected $profiler; |
| 55 | /** @var TransactionManager */ |
| 56 | private $transactionManager; |
| 57 | |
| 58 | /** @var DatabaseDomain */ |
| 59 | protected $currentDomain; |
| 60 | /** @var DatabaseFlags */ |
| 61 | protected $flagsHolder; |
| 62 | |
| 63 | // phpcs:ignore MediaWiki.Commenting.PropertyDocumentation.ObjectTypeHintVar |
| 64 | /** @var object|resource|null Database connection */ |
| 65 | protected $conn; |
| 66 | |
| 67 | /** @var string|null Readable name or host/IP of the database server */ |
| 68 | protected $serverName; |
| 69 | /** @var bool Whether this PHP instance is for a CLI script */ |
| 70 | protected $cliMode; |
| 71 | /** @var int|null Maximum seconds to wait on connection attempts */ |
| 72 | protected $connectTimeout; |
| 73 | /** @var int|null Maximum seconds to wait on receiving query results */ |
| 74 | protected $receiveTimeout; |
| 75 | /** @var string Agent name for query profiling */ |
| 76 | protected $agent; |
| 77 | /** @var array<string,mixed> Connection parameters used by initConnection() and open() */ |
| 78 | protected $connectionParams; |
| 79 | /** @var string[]|int[]|float[] SQL variables values to use for all new connections */ |
| 80 | protected $connectionVariables; |
| 81 | /** @var int Row batch size to use for emulated INSERT SELECT queries */ |
| 82 | protected $nonNativeInsertSelectBatchSize; |
| 83 | |
| 84 | /** @var bool Whether to use SSL connections */ |
| 85 | protected $ssl; |
| 86 | /** @var bool Whether to check for warnings */ |
| 87 | protected $strictWarnings; |
| 88 | /** @var array Current LoadBalancer tracking information */ |
| 89 | protected $lbInfo = []; |
| 90 | /** @var string|false Current SQL query delimiter */ |
| 91 | protected $delimiter = ';'; |
| 92 | |
| 93 | /** @var string|bool|null Stashed value of html_errors INI setting */ |
| 94 | private $htmlErrors; |
| 95 | |
| 96 | /** @var array<string,array> Map of (lock name => (UNIX time,trx ID)) */ |
| 97 | protected $sessionNamedLocks = []; |
| 98 | /** @var array<string,array<string, TempTableInfo>> Map of (DB name => table name => info) */ |
| 99 | protected $sessionTempTables = []; |
| 100 | |
| 101 | /** @var int Affected row count for the last statement to query() */ |
| 102 | protected $lastQueryAffectedRows = 0; |
| 103 | /** @var int|null Insert (row) ID for the last statement to query() (null if not supported) */ |
| 104 | protected $lastQueryInsertId; |
| 105 | |
| 106 | /** @var int|null Affected row count for the last query method call; null if unspecified */ |
| 107 | protected $lastEmulatedAffectedRows; |
| 108 | /** @var int|null Insert (row) ID for the last query method call; null if unspecified */ |
| 109 | protected $lastEmulatedInsertId; |
| 110 | |
| 111 | /** @var string Last error during connection; empty string if none */ |
| 112 | protected $lastConnectError = ''; |
| 113 | |
| 114 | /** @var float UNIX timestamp of the last server response */ |
| 115 | private $lastPing = 0.0; |
| 116 | /** @var float|false UNIX timestamp of last write query */ |
| 117 | private $lastWriteTime = false; |
| 118 | /** @var string|false The last PHP error from a query or connection attempt */ |
| 119 | private $lastPhpError = false; |
| 120 | |
| 121 | /** @var int|null Current critical section numeric ID */ |
| 122 | private $csmId; |
| 123 | /** @var string|null Last critical section caller name */ |
| 124 | private $csmFname; |
| 125 | /** @var DBUnexpectedError|null Last unresolved critical section error */ |
| 126 | private $csmError; |
| 127 | |
| 128 | /** Whether the database is a file on disk */ |
| 129 | public const ATTR_DB_IS_FILE = 'db-is-file'; |
| 130 | /** Lock granularity is on the level of the entire database */ |
| 131 | public const ATTR_DB_LEVEL_LOCKING = 'db-level-locking'; |
| 132 | /** The SCHEMA keyword refers to a grouping of tables in a database */ |
| 133 | public const ATTR_SCHEMAS_AS_TABLE_GROUPS = 'supports-schemas'; |
| 134 | |
| 135 | /** New Database instance will not be connected yet when returned */ |
| 136 | public const NEW_UNCONNECTED = 0; |
| 137 | /** New Database instance will already be connected when returned */ |
| 138 | public const NEW_CONNECTED = 1; |
| 139 | |
| 140 | /** No errors occurred during the query */ |
| 141 | protected const ERR_NONE = 0; |
| 142 | /** Retry query due to a connection loss detected while sending the query (session intact) */ |
| 143 | protected const ERR_RETRY_QUERY = 1; |
| 144 | /** Abort query (no retries) due to a statement rollback (session/transaction intact) */ |
| 145 | protected const ERR_ABORT_QUERY = 2; |
| 146 | /** Abort any current transaction, by rolling it back, due to an error during the query */ |
| 147 | protected const ERR_ABORT_TRX = 4; |
| 148 | /** Abort and reset session due to server-side session-level state loss (locks, temp tables) */ |
| 149 | protected const ERR_ABORT_SESSION = 8; |
| 150 | |
| 151 | /** Assume that queries taking this long to yield connection loss errors are at fault */ |
| 152 | protected const DROPPED_CONN_BLAME_THRESHOLD_SEC = 3.0; |
| 153 | |
| 154 | /** @var string Idiom used when a cancelable atomic section started the transaction */ |
| 155 | private const NOT_APPLICABLE = 'n/a'; |
| 156 | |
| 157 | /** How long before it is worth doing a dummy query to test the connection */ |
| 158 | private const PING_TTL = 1.0; |
| 159 | /** Dummy SQL query */ |
| 160 | private const PING_QUERY = 'SELECT 1 AS ping'; |
| 161 | |
| 162 | /** Hostname or IP address to use on all connections */ |
| 163 | protected const CONN_HOST = 'host'; |
| 164 | /** Database server username to use on all connections */ |
| 165 | protected const CONN_USER = 'user'; |
| 166 | /** Database server password to use on all connections */ |
| 167 | protected const CONN_PASSWORD = 'password'; |
| 168 | /** Database name to use on initial connection */ |
| 169 | protected const CONN_INITIAL_DB = 'dbname'; |
| 170 | /** Schema name to use on initial connection */ |
| 171 | protected const CONN_INITIAL_SCHEMA = 'schema'; |
| 172 | /** Table prefix to use on initial connection */ |
| 173 | protected const CONN_INITIAL_TABLE_PREFIX = 'tablePrefix'; |
| 174 | |
| 175 | /** @var SQLPlatform */ |
| 176 | protected $platform; |
| 177 | |
| 178 | /** @var ReplicationReporter */ |
| 179 | protected $replicationReporter; |
| 180 | |
| 181 | /** |
| 182 | * @note exceptions for missing libraries/drivers should be thrown in initConnection() |
| 183 | * @param array $params Parameters passed from Database::factory() |
| 184 | */ |
| 185 | public function __construct( array $params ) { |
| 186 | $this->logger = $params['logger'] ?? new NullLogger(); |
| 187 | $this->transactionManager = new TransactionManager( |
| 188 | $this->logger, |
| 189 | $params['trxProfiler'] |
| 190 | ); |
| 191 | $this->connectionParams = [ |
| 192 | self::CONN_HOST => ( isset( $params['host'] ) && $params['host'] !== '' ) |
| 193 | ? $params['host'] |
| 194 | : null, |
| 195 | self::CONN_USER => ( isset( $params['user'] ) && $params['user'] !== '' ) |
| 196 | ? $params['user'] |
| 197 | : null, |
| 198 | self::CONN_INITIAL_DB => ( isset( $params['dbname'] ) && $params['dbname'] !== '' ) |
| 199 | ? $params['dbname'] |
| 200 | : null, |
| 201 | self::CONN_INITIAL_SCHEMA => ( isset( $params['schema'] ) && $params['schema'] !== '' ) |
| 202 | ? $params['schema'] |
| 203 | : null, |
| 204 | self::CONN_PASSWORD => is_string( $params['password'] ) ? $params['password'] : null, |
| 205 | self::CONN_INITIAL_TABLE_PREFIX => (string)$params['tablePrefix'] |
| 206 | ]; |
| 207 | |
| 208 | $this->lbInfo = $params['lbInfo'] ?? []; |
| 209 | $this->connectionVariables = $params['variables'] ?? []; |
| 210 | // Set SQL mode, default is turning them all off, can be overridden or skipped with null |
| 211 | if ( is_string( $params['sqlMode'] ?? null ) ) { |
| 212 | $this->connectionVariables['sql_mode'] = $params['sqlMode']; |
| 213 | } |
| 214 | $flags = (int)$params['flags']; |
| 215 | $this->flagsHolder = new DatabaseFlags( $flags ); |
| 216 | $this->ssl = $params['ssl'] ?? (bool)( $flags & self::DBO_SSL ); |
| 217 | $this->connectTimeout = $params['connectTimeout'] ?? null; |
| 218 | $this->receiveTimeout = $params['receiveTimeout'] ?? null; |
| 219 | $this->cliMode = (bool)$params['cliMode']; |
| 220 | $this->agent = (string)$params['agent']; |
| 221 | $this->serverName = $params['serverName']; |
| 222 | $this->nonNativeInsertSelectBatchSize = $params['nonNativeInsertSelectBatchSize'] ?? 10000; |
| 223 | $this->strictWarnings = !empty( $params['strictWarnings'] ); |
| 224 | |
| 225 | $this->profiler = is_callable( $params['profiler'] ) ? $params['profiler'] : null; |
| 226 | $this->errorLogger = $params['errorLogger']; |
| 227 | $this->deprecationLogger = $params['deprecationLogger']; |
| 228 | |
| 229 | $this->csProvider = $params['criticalSectionProvider'] ?? null; |
| 230 | |
| 231 | // Set initial dummy domain until open() sets the final DB/prefix |
| 232 | $this->currentDomain = new DatabaseDomain( |
| 233 | $params['dbname'] != '' ? $params['dbname'] : null, |
| 234 | $params['schema'] != '' ? $params['schema'] : null, |
| 235 | $params['tablePrefix'] |
| 236 | ); |
| 237 | $this->platform = new SQLPlatform( |
| 238 | $this, |
| 239 | $this->logger, |
| 240 | $this->currentDomain, |
| 241 | $this->errorLogger |
| 242 | ); |
| 243 | // Children classes must set $this->replicationReporter. |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * Initialize the connection to the database over the wire (or to local files) |
| 248 | * |
| 249 | * @throws LogicException |
| 250 | * @throws InvalidArgumentException |
| 251 | * @throws DBConnectionError |
| 252 | * @since 1.31 |
| 253 | */ |
| 254 | final public function initConnection() { |
| 255 | if ( $this->isOpen() ) { |
| 256 | throw new LogicException( __METHOD__ . ': already connected' ); |
| 257 | } |
| 258 | // Establish the connection |
| 259 | $this->open( |
| 260 | $this->connectionParams[self::CONN_HOST], |
| 261 | $this->connectionParams[self::CONN_USER], |
| 262 | $this->connectionParams[self::CONN_PASSWORD], |
| 263 | $this->connectionParams[self::CONN_INITIAL_DB], |
| 264 | $this->connectionParams[self::CONN_INITIAL_SCHEMA], |
| 265 | $this->connectionParams[self::CONN_INITIAL_TABLE_PREFIX] |
| 266 | ); |
| 267 | $this->lastPing = microtime( true ); |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * Open a new connection to the database (closing any existing one) |
| 272 | * |
| 273 | * @param string|null $server Server host/address and optional port {@see connectionParams} |
| 274 | * @param string|null $user User name {@see connectionParams} |
| 275 | * @param string|null $password User password {@see connectionParams} |
| 276 | * @param string|null $db Database name |
| 277 | * @param string|null $schema Database schema name |
| 278 | * @param string $tablePrefix |
| 279 | * @throws DBConnectionError |
| 280 | */ |
| 281 | abstract protected function open( $server, $user, $password, $db, $schema, $tablePrefix ); |
| 282 | |
| 283 | /** |
| 284 | * @return array Map of (Database::ATTR_* constant => value) |
| 285 | * @since 1.31 |
| 286 | */ |
| 287 | public static function getAttributes() { |
| 288 | return []; |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Set the PSR-3 logger interface to use. |
| 293 | * |
| 294 | * @param LoggerInterface $logger |
| 295 | */ |
| 296 | public function setLogger( LoggerInterface $logger ) { |
| 297 | $this->logger = $logger; |
| 298 | } |
| 299 | |
| 300 | public function getServerInfo() { |
| 301 | return $this->getServerVersion(); |
| 302 | } |
| 303 | |
| 304 | public function tablePrefix( $prefix = null ) { |
| 305 | $old = $this->currentDomain->getTablePrefix(); |
| 306 | |
| 307 | if ( $prefix !== null ) { |
| 308 | $this->currentDomain = new DatabaseDomain( |
| 309 | $this->currentDomain->getDatabase(), |
| 310 | $this->currentDomain->getSchema(), |
| 311 | $prefix |
| 312 | ); |
| 313 | $this->platform->setCurrentDomain( $this->currentDomain ); |
| 314 | } |
| 315 | |
| 316 | return $old; |
| 317 | } |
| 318 | |
| 319 | public function dbSchema( $schema = null ) { |
| 320 | $old = $this->currentDomain->getSchema(); |
| 321 | |
| 322 | if ( $schema !== null ) { |
| 323 | if ( $schema !== '' && $this->getDBname() === null ) { |
| 324 | throw new DBUnexpectedError( |
| 325 | $this, |
| 326 | "Cannot set schema to '$schema'; no database set" |
| 327 | ); |
| 328 | } |
| 329 | |
| 330 | $this->currentDomain = new DatabaseDomain( |
| 331 | $this->currentDomain->getDatabase(), |
| 332 | // DatabaseDomain uses null for unspecified schemas |
| 333 | ( $schema !== '' ) ? $schema : null, |
| 334 | $this->currentDomain->getTablePrefix() |
| 335 | ); |
| 336 | $this->platform->setCurrentDomain( $this->currentDomain ); |
| 337 | } |
| 338 | |
| 339 | return (string)$old; |
| 340 | } |
| 341 | |
| 342 | public function getLBInfo( $name = null ) { |
| 343 | if ( $name === null ) { |
| 344 | return $this->lbInfo; |
| 345 | } |
| 346 | |
| 347 | if ( array_key_exists( $name, $this->lbInfo ) ) { |
| 348 | return $this->lbInfo[$name]; |
| 349 | } |
| 350 | |
| 351 | return null; |
| 352 | } |
| 353 | |
| 354 | public function setLBInfo( $nameOrArray, $value = null ) { |
| 355 | if ( is_array( $nameOrArray ) ) { |
| 356 | $this->lbInfo = $nameOrArray; |
| 357 | } elseif ( is_string( $nameOrArray ) ) { |
| 358 | if ( $value !== null ) { |
| 359 | $this->lbInfo[$nameOrArray] = $value; |
| 360 | } else { |
| 361 | unset( $this->lbInfo[$nameOrArray] ); |
| 362 | } |
| 363 | } else { |
| 364 | throw new InvalidArgumentException( "Got non-string key" ); |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | public function lastDoneWrites() { |
| 369 | return $this->lastWriteTime ?: false; |
| 370 | } |
| 371 | |
| 372 | /** |
| 373 | * @return bool |
| 374 | * @since 1.39 |
| 375 | * @internal For use by Database/LoadBalancer only |
| 376 | */ |
| 377 | public function sessionLocksPending() { |
| 378 | return (bool)$this->sessionNamedLocks; |
| 379 | } |
| 380 | |
| 381 | /** |
| 382 | * @return string|null ID of the active explicit transaction round being participating in |
| 383 | */ |
| 384 | final protected function getTransactionRoundId() { |
| 385 | if ( $this->flagsHolder->hasImplicitTrxFlag() ) { |
| 386 | // LoadBalancer transaction round participation is enabled for this DB handle; |
| 387 | // get the ID of the active explicit transaction round (if any) |
| 388 | $id = $this->getLBInfo( self::LB_TRX_ROUND_ID ); |
| 389 | |
| 390 | return is_string( $id ) ? $id : null; |
| 391 | } |
| 392 | |
| 393 | return null; |
| 394 | } |
| 395 | |
| 396 | public function isOpen() { |
| 397 | return (bool)$this->conn; |
| 398 | } |
| 399 | |
| 400 | public function getDomainID() { |
| 401 | return $this->currentDomain->getId(); |
| 402 | } |
| 403 | |
| 404 | /** |
| 405 | * Wrapper for addslashes() |
| 406 | * |
| 407 | * @param string $s String to be slashed. |
| 408 | * @return string Slashed string. |
| 409 | */ |
| 410 | abstract public function strencode( $s ); |
| 411 | |
| 412 | /** |
| 413 | * Set a custom error handler for logging errors during database connection |
| 414 | */ |
| 415 | protected function installErrorHandler() { |
| 416 | $this->lastPhpError = false; |
| 417 | $this->htmlErrors = ini_set( 'html_errors', '0' ); |
| 418 | set_error_handler( [ $this, 'connectionErrorLogger' ] ); |
| 419 | } |
| 420 | |
| 421 | /** |
| 422 | * Restore the previous error handler and return the last PHP error for this DB |
| 423 | * |
| 424 | * @return string|false |
| 425 | */ |
| 426 | protected function restoreErrorHandler() { |
| 427 | restore_error_handler(); |
| 428 | if ( $this->htmlErrors !== false ) { |
| 429 | ini_set( 'html_errors', $this->htmlErrors ); |
| 430 | } |
| 431 | |
| 432 | return $this->getLastPHPError(); |
| 433 | } |
| 434 | |
| 435 | /** |
| 436 | * @return string|false Last PHP error for this DB (typically connection errors) |
| 437 | */ |
| 438 | protected function getLastPHPError() { |
| 439 | if ( $this->lastPhpError ) { |
| 440 | $error = preg_replace( '!\[<a.*</a>\]!', '', $this->lastPhpError ); |
| 441 | $error = preg_replace( '!^.*?:\s?(.*)$!', '$1', $error ); |
| 442 | |
| 443 | return $error; |
| 444 | } |
| 445 | |
| 446 | return false; |
| 447 | } |
| 448 | |
| 449 | /** |
| 450 | * Error handler for logging errors during database connection |
| 451 | * |
| 452 | * @internal This method should not be used outside of Database classes |
| 453 | * |
| 454 | * @param int|string $errno |
| 455 | * @param string $errstr |
| 456 | */ |
| 457 | public function connectionErrorLogger( $errno, $errstr ) { |
| 458 | $this->lastPhpError = $errstr; |
| 459 | } |
| 460 | |
| 461 | /** |
| 462 | * Create a log context to pass to PSR-3 logger functions. |
| 463 | * |
| 464 | * @param array $extras Additional data to add to context |
| 465 | * @return array |
| 466 | */ |
| 467 | protected function getLogContext( array $extras = [] ) { |
| 468 | return array_merge( |
| 469 | [ |
| 470 | 'db_server' => $this->getServerName(), |
| 471 | 'db_name' => $this->getDBname(), |
| 472 | 'db_user' => $this->connectionParams[self::CONN_USER] ?? null, |
| 473 | ], |
| 474 | $extras |
| 475 | ); |
| 476 | } |
| 477 | |
| 478 | final public function close( $fname = __METHOD__ ) { |
| 479 | $error = null; // error to throw after disconnecting |
| 480 | |
| 481 | $wasOpen = (bool)$this->conn; |
| 482 | // This should mostly do nothing if the connection is already closed |
| 483 | if ( $this->conn ) { |
| 484 | // Roll back any dangling transaction first |
| 485 | if ( $this->trxLevel() ) { |
| 486 | $error = $this->transactionManager->trxCheckBeforeClose( $this, $fname ); |
| 487 | // Rollback the changes and run any callbacks as needed |
| 488 | $this->rollback( __METHOD__, self::FLUSHING_INTERNAL ); |
| 489 | $this->runTransactionPostRollbackCallbacks(); |
| 490 | } |
| 491 | |
| 492 | // Close the actual connection in the binding handle |
| 493 | $closed = $this->closeConnection(); |
| 494 | } else { |
| 495 | $closed = true; // already closed; nothing to do |
| 496 | } |
| 497 | |
| 498 | $this->conn = null; |
| 499 | |
| 500 | // Log any unexpected errors after having disconnected |
| 501 | if ( $error !== null ) { |
| 502 | // T217819, T231443: this is probably just LoadBalancer trying to recover from |
| 503 | // errors and shutdown. Log any problems and move on since the request has to |
| 504 | // end one way or another. Throwing errors is not very useful at some point. |
| 505 | $this->logger->error( $error, [ 'db_log_category' => 'query' ] ); |
| 506 | } |
| 507 | |
| 508 | // Note that various subclasses call close() at the start of open(), which itself is |
| 509 | // called by replaceLostConnection(). In that case, just because onTransactionResolution() |
| 510 | // callbacks are pending does not mean that an exception should be thrown. Rather, they |
| 511 | // will be executed after the reconnection step. |
| 512 | if ( $wasOpen ) { |
| 513 | // Double check that no callbacks are dangling |
| 514 | $fnames = $this->pendingWriteAndCallbackCallers(); |
| 515 | if ( $fnames ) { |
| 516 | throw new RuntimeException( |
| 517 | "Transaction callbacks are still pending: " . implode( ', ', $fnames ) |
| 518 | ); |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | return $closed; |
| 523 | } |
| 524 | |
| 525 | /** |
| 526 | * Make sure there is an open connection handle (alive or not) |
| 527 | * |
| 528 | * This guards against fatal errors to the binding handle not being defined in cases |
| 529 | * where open() was never called or close() was already called. |
| 530 | * |
| 531 | * @throws DBUnexpectedError |
| 532 | */ |
| 533 | final protected function assertHasConnectionHandle() { |
| 534 | if ( !$this->isOpen() ) { |
| 535 | throw new DBUnexpectedError( $this, "DB connection was already closed" ); |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | /** |
| 540 | * Closes underlying database connection |
| 541 | * @return bool Whether connection was closed successfully |
| 542 | * @since 1.20 |
| 543 | */ |
| 544 | abstract protected function closeConnection(); |
| 545 | |
| 546 | /** |
| 547 | * Run a query and return a QueryStatus instance with the query result information |
| 548 | * |
| 549 | * This is meant to handle the basic command of actually sending a query to the |
| 550 | * server via the driver. No implicit transaction, reconnection, nor retry logic |
| 551 | * should happen here. The higher level query() method is designed to handle those |
| 552 | * sorts of concerns. This method should not trigger such higher level methods. |
| 553 | * |
| 554 | * The lastError() and lastErrno() methods should meaningfully reflect what error, |
| 555 | * if any, occurred during the last call to this method. Methods like executeQuery(), |
| 556 | * query(), select(), insert(), update(), delete(), and upsert() implement their calls |
| 557 | * to doQuery() such that an immediately subsequent call to lastError()/lastErrno() |
| 558 | * meaningfully reflects any error that occurred during that public query method call. |
| 559 | * |
| 560 | * For SELECT queries, the result field contains either: |
| 561 | * - a) A driver-specific IResultWrapper describing the query results |
| 562 | * - b) False, on any query failure |
| 563 | * |
| 564 | * For non-SELECT queries, the result field contains either: |
| 565 | * - a) A driver-specific IResultWrapper, only on success |
| 566 | * - b) True, only on success (e.g. no meaningful result other than "OK") |
| 567 | * - c) False, on any query failure |
| 568 | * |
| 569 | * @param string $sql Single-statement SQL query |
| 570 | * @return QueryStatus |
| 571 | * @since 1.39 |
| 572 | */ |
| 573 | abstract protected function doSingleStatementQuery( string $sql ): QueryStatus; |
| 574 | |
| 575 | /** |
| 576 | * Determine whether a write query affects a permanent table. |
| 577 | * This includes pseudo-permanent tables. |
| 578 | * |
| 579 | * @param Query $query |
| 580 | * @return bool |
| 581 | */ |
| 582 | private function hasPermanentTable( Query $query ) { |
| 583 | if ( $query->getVerb() === 'CREATE TEMPORARY' ) { |
| 584 | // Temporary table creation is allowed |
| 585 | return false; |
| 586 | } |
| 587 | $table = $query->getWriteTable(); |
| 588 | if ( $table === null ) { |
| 589 | // Parse error? Assume permanent. |
| 590 | return true; |
| 591 | } |
| 592 | [ $db, $pt ] = $this->platform->getDatabaseAndTableIdentifier( $table ); |
| 593 | $tempInfo = $this->sessionTempTables[$db][$pt] ?? null; |
| 594 | return !$tempInfo || $tempInfo->pseudoPermanent; |
| 595 | } |
| 596 | |
| 597 | /** |
| 598 | * Register creation and dropping of temporary tables |
| 599 | * |
| 600 | * @param Query $query |
| 601 | */ |
| 602 | protected function registerTempTables( Query $query ) { |
| 603 | $table = $query->getWriteTable(); |
| 604 | if ( $table === null ) { |
| 605 | return; |
| 606 | } |
| 607 | switch ( $query->getVerb() ) { |
| 608 | case 'CREATE TEMPORARY': |
| 609 | [ $db, $pt ] = $this->platform->getDatabaseAndTableIdentifier( $table ); |
| 610 | $this->sessionTempTables[$db][$pt] = new TempTableInfo( |
| 611 | $this->transactionManager->getTrxId(), |
| 612 | (bool)( $query->getFlags() & self::QUERY_PSEUDO_PERMANENT ) |
| 613 | ); |
| 614 | break; |
| 615 | |
| 616 | case 'DROP': |
| 617 | [ $db, $pt ] = $this->platform->getDatabaseAndTableIdentifier( $table ); |
| 618 | unset( $this->sessionTempTables[$db][$pt] ); |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | public function query( $sql, $fname = __METHOD__, $flags = 0 ) { |
| 623 | if ( !( $sql instanceof Query ) ) { |
| 624 | $flags = (int)$flags; // b/c; this field used to be a bool |
| 625 | $sql = QueryBuilderFromRawSql::buildQuery( $sql, $flags, $this->currentDomain->getTablePrefix() ); |
| 626 | } else { |
| 627 | $flags = $sql->getFlags(); |
| 628 | } |
| 629 | |
| 630 | // Make sure that this caller is allowed to issue this query statement |
| 631 | $this->assertQueryIsCurrentlyAllowed( $sql->getVerb(), $fname ); |
| 632 | |
| 633 | // Send the query to the server and fetch any corresponding errors |
| 634 | $status = $this->executeQuery( $sql, $fname, $flags ); |
| 635 | if ( $status->res === false ) { |
| 636 | // An error occurred; log, and, if needed, report an exception. |
| 637 | // Errors that corrupt the transaction/session state cannot be silenced. |
| 638 | $ignore = ( |
| 639 | $this->flagsHolder::contains( $flags, self::QUERY_SILENCE_ERRORS ) && |
| 640 | !$this->flagsHolder::contains( $status->flags, self::ERR_ABORT_SESSION ) && |
| 641 | !$this->flagsHolder::contains( $status->flags, self::ERR_ABORT_TRX ) |
| 642 | ); |
| 643 | $this->reportQueryError( $status->message, $status->code, $sql->getSQL(), $fname, $ignore ); |
| 644 | } |
| 645 | |
| 646 | return $status->res; |
| 647 | } |
| 648 | |
| 649 | /** |
| 650 | * Execute a query without enforcing public (non-Database) caller restrictions. |
| 651 | * |
| 652 | * Retry it if there is a recoverable connection loss (e.g. no important state lost). |
| 653 | * |
| 654 | * This does not precheck for transaction/session state errors or critical section errors. |
| 655 | * |
| 656 | * @see Database::query() |
| 657 | * |
| 658 | * @param Query $sql SQL statement |
| 659 | * @param string $fname Name of the calling function |
| 660 | * @param int $flags Bit field of ISQLPlatform::QUERY_* constants |
| 661 | * @return QueryStatus |
| 662 | * @throws DBUnexpectedError |
| 663 | * @since 1.34 |
| 664 | */ |
| 665 | final protected function executeQuery( $sql, $fname, $flags ) { |
| 666 | $this->assertHasConnectionHandle(); |
| 667 | |
| 668 | $isPermWrite = false; |
| 669 | $isWrite = $sql->isWriteQuery(); |
| 670 | if ( $isWrite ) { |
| 671 | ChangedTablesTracker::recordQuery( $this->currentDomain, $sql ); |
| 672 | // Permit temporary table writes on replica connections, but require a writable |
| 673 | // master connection for writes to persistent tables. |
| 674 | if ( $this->hasPermanentTable( $sql ) ) { |
| 675 | $isPermWrite = true; |
| 676 | $info = $this->getReadOnlyReason(); |
| 677 | if ( $info ) { |
| 678 | [ $reason, $source ] = $info; |
| 679 | if ( $source === 'role' ) { |
| 680 | throw new DBReadOnlyRoleError( $this, "Database is read-only: $reason" ); |
| 681 | } else { |
| 682 | throw new DBReadOnlyError( $this, "Database is read-only: $reason" ); |
| 683 | } |
| 684 | } |
| 685 | // DBConnRef uses QUERY_REPLICA_ROLE to enforce replica roles during query() |
| 686 | if ( $this->flagsHolder::contains( $sql->getFlags(), self::QUERY_REPLICA_ROLE ) ) { |
| 687 | throw new DBReadOnlyRoleError( |
| 688 | $this, |
| 689 | "Cannot write; target role is DB_REPLICA" |
| 690 | ); |
| 691 | } |
| 692 | } |
| 693 | } |
| 694 | |
| 695 | // Whether a silent retry attempt is left for recoverable connection loss errors |
| 696 | $retryLeft = !$this->flagsHolder::contains( $flags, self::QUERY_NO_RETRY ); |
| 697 | |
| 698 | $cs = $this->commenceCriticalSection( __METHOD__ ); |
| 699 | |
| 700 | do { |
| 701 | // Start a DBO_TRX wrapper transaction as needed (throw an error on failure) |
| 702 | if ( $this->beginIfImplied( $sql, $fname, $flags ) ) { |
| 703 | // Since begin() was called, any connection loss was already handled |
| 704 | $retryLeft = false; |
| 705 | } |
| 706 | // Send the query statement to the server and fetch any results. |
| 707 | $status = $this->attemptQuery( $sql, $fname, $isPermWrite ); |
| 708 | } while ( |
| 709 | // An error occurred that can be recovered from via query retry |
| 710 | $this->flagsHolder::contains( $status->flags, self::ERR_RETRY_QUERY ) && |
| 711 | // The retry has not been exhausted (consume it now) |
| 712 | $retryLeft && !( $retryLeft = false ) |
| 713 | ); |
| 714 | |
| 715 | // Register creation and dropping of temporary tables |
| 716 | if ( $status->res ) { |
| 717 | $this->registerTempTables( $sql ); |
| 718 | } |
| 719 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 720 | |
| 721 | return $status; |
| 722 | } |
| 723 | |
| 724 | /** |
| 725 | * Query method wrapper handling profiling, logging, affected row count tracking, and |
| 726 | * automatic reconnections (without retry) on query failure due to connection loss |
| 727 | * |
| 728 | * Note that this does not handle DBO_TRX logic. |
| 729 | * |
| 730 | * This method handles profiling, debug logging, reconnection and the tracking of: |
| 731 | * - write callers |
| 732 | * - last write time |
| 733 | * - affected row count of the last write |
| 734 | * - whether writes occurred in a transaction |
| 735 | * - last successful query time (confirming that the connection was not dropped) |
| 736 | * |
| 737 | * @see doSingleStatementQuery() |
| 738 | * |
| 739 | * @param Query $sql SQL statement |
| 740 | * @param string $fname Name of the calling function |
| 741 | * @param bool $isPermWrite Whether it's a query writing to permanent tables |
| 742 | * @return QueryStatus statement result |
| 743 | * @throws DBUnexpectedError |
| 744 | */ |
| 745 | private function attemptQuery( |
| 746 | $sql, |
| 747 | string $fname, |
| 748 | bool $isPermWrite |
| 749 | ) { |
| 750 | // Transaction attributes before issuing this query |
| 751 | $priorSessInfo = new CriticalSessionInfo( |
| 752 | $this->transactionManager->getTrxId(), |
| 753 | $this->transactionManager->explicitTrxActive(), |
| 754 | $this->transactionManager->pendingWriteCallers(), |
| 755 | $this->transactionManager->pendingPreCommitCallbackCallers(), |
| 756 | $this->sessionNamedLocks, |
| 757 | $this->sessionTempTables |
| 758 | ); |
| 759 | // Get the transaction-aware SQL string used for profiling |
| 760 | $prefix = ( |
| 761 | $this->replicationReporter->getTopologyRole() === self::ROLE_STREAMING_MASTER |
| 762 | ) ? 'role-primary: ' : ''; |
| 763 | |
| 764 | // Start profile section |
| 765 | if ( $sql->getCleanedSql() ) { |
| 766 | $generalizedSql = $sql; |
| 767 | $ps = $this->profiler ? ( $this->profiler )( $sql->getCleanedSql() ) : null; |
| 768 | } else { |
| 769 | $generalizedSql = new GeneralizedSql( $sql->getSQL(), $prefix ); |
| 770 | $ps = $this->profiler ? ( $this->profiler )( $generalizedSql->stringify() ) : null; |
| 771 | } |
| 772 | // Add agent and calling method comments to the SQL |
| 773 | $cStatement = $this->makeCommentedSql( $sql->getSQL(), $fname ); |
| 774 | $startTime = microtime( true ); |
| 775 | |
| 776 | // Clear any overrides from a prior "query method". Note that this does not affect |
| 777 | // any such methods that are currently invoking query() itself since those query |
| 778 | // methods set these fields before returning. |
| 779 | $this->lastEmulatedAffectedRows = null; |
| 780 | $this->lastEmulatedInsertId = null; |
| 781 | |
| 782 | $status = $this->doSingleStatementQuery( $cStatement ); |
| 783 | |
| 784 | // End profile section |
| 785 | $endTime = microtime( true ); |
| 786 | $queryRuntime = max( $endTime - $startTime, 0.0 ); |
| 787 | unset( $ps ); |
| 788 | |
| 789 | if ( $status->res !== false ) { |
| 790 | $this->lastPing = $endTime; |
| 791 | } |
| 792 | |
| 793 | $affectedRowCount = $status->rowsAffected; |
| 794 | $returnedRowCount = $status->rowsReturned; |
| 795 | $this->lastQueryAffectedRows = $affectedRowCount; |
| 796 | |
| 797 | if ( $status->res !== false ) { |
| 798 | if ( $isPermWrite ) { |
| 799 | $this->lastWriteTime = $startTime; |
| 800 | if ( $this->trxLevel() ) { |
| 801 | $this->transactionManager->transactionWritingIn( |
| 802 | $this->getServerName(), |
| 803 | $this->getDomainID(), |
| 804 | $startTime |
| 805 | ); |
| 806 | $this->transactionManager->updateTrxWriteQueryReport( |
| 807 | $sql->getSQL(), |
| 808 | $queryRuntime, |
| 809 | $affectedRowCount, |
| 810 | $fname |
| 811 | ); |
| 812 | } |
| 813 | } |
| 814 | } |
| 815 | |
| 816 | $this->transactionManager->recordQueryCompletion( |
| 817 | $generalizedSql, |
| 818 | $startTime, |
| 819 | $isPermWrite, |
| 820 | $isPermWrite ? $affectedRowCount : $returnedRowCount, |
| 821 | $this->getServerName() |
| 822 | ); |
| 823 | |
| 824 | // Check if the query failed... |
| 825 | $status->flags = $this->handleErroredQuery( $status, $sql, $fname, $queryRuntime, $priorSessInfo ); |
| 826 | // Avoid the overhead of logging calls unless debug mode is enabled |
| 827 | if ( $this->flagsHolder->getFlag( self::DBO_DEBUG ) ) { |
| 828 | $this->logger->debug( |
| 829 | "{method} [{runtime_ms}ms] {db_server}: {sql}", |
| 830 | $this->getLogContext( [ |
| 831 | 'method' => $fname, |
| 832 | 'sql' => $sql->getSQL(), |
| 833 | 'domain' => $this->getDomainID(), |
| 834 | 'runtime_ms' => round( $queryRuntime * 1000, 3 ), |
| 835 | 'db_log_category' => 'query' |
| 836 | ] ) |
| 837 | ); |
| 838 | } |
| 839 | |
| 840 | return $status; |
| 841 | } |
| 842 | |
| 843 | private function handleErroredQuery( QueryStatus $status, $sql, $fname, $queryRuntime, $priorSessInfo ) { |
| 844 | $errflags = self::ERR_NONE; |
| 845 | $error = $status->message; |
| 846 | $errno = $status->code; |
| 847 | if ( $status->res !== false ) { |
| 848 | // Statement succeeded |
| 849 | return $errflags; |
| 850 | } |
| 851 | if ( $this->isConnectionError( $errno ) ) { |
| 852 | // Connection lost before or during the query... |
| 853 | // Determine how to proceed given the lost session state |
| 854 | $connLossFlag = $this->assessConnectionLoss( |
| 855 | $sql->getVerb(), |
| 856 | $queryRuntime, |
| 857 | $priorSessInfo |
| 858 | ); |
| 859 | // Update session state tracking and try to reestablish a connection |
| 860 | $reconnected = $this->replaceLostConnection( $errno, __METHOD__ ); |
| 861 | // Check if important server-side session-level state was lost |
| 862 | if ( $connLossFlag >= self::ERR_ABORT_SESSION ) { |
| 863 | $ex = $this->getQueryException( $error, $errno, $sql->getSQL(), $fname ); |
| 864 | $this->transactionManager->setSessionError( $ex ); |
| 865 | } |
| 866 | // Check if important server-side transaction-level state was lost |
| 867 | if ( $connLossFlag >= self::ERR_ABORT_TRX ) { |
| 868 | $ex = $this->getQueryException( $error, $errno, $sql->getSQL(), $fname ); |
| 869 | $this->transactionManager->setTransactionError( $ex ); |
| 870 | } |
| 871 | // Check if the query should be retried (having made the reconnection attempt) |
| 872 | if ( $connLossFlag === self::ERR_RETRY_QUERY ) { |
| 873 | $errflags |= ( $reconnected ? self::ERR_RETRY_QUERY : self::ERR_ABORT_QUERY ); |
| 874 | } else { |
| 875 | $errflags |= $connLossFlag; |
| 876 | } |
| 877 | } elseif ( $this->isKnownStatementRollbackError( $errno ) ) { |
| 878 | // Query error triggered a server-side statement-only rollback... |
| 879 | $errflags |= self::ERR_ABORT_QUERY; |
| 880 | if ( $this->trxLevel() ) { |
| 881 | // Allow legacy callers to ignore such errors via QUERY_IGNORE_DBO_TRX and |
| 882 | // try/catch. However, a deprecation notice will be logged on the next query. |
| 883 | $cause = [ $error, $errno, $fname ]; |
| 884 | $this->transactionManager->setTrxStatusIgnoredCause( $cause ); |
| 885 | } |
| 886 | } elseif ( $this->trxLevel() ) { |
| 887 | // Some other error occurred during the query, within a transaction... |
| 888 | // Server-side handling of errors during transactions varies widely depending on |
| 889 | // the RDBMS type and configuration. There are several possible results: (a) the |
| 890 | // whole transaction is rolled back, (b) only the queries after BEGIN are rolled |
| 891 | // back, (c) the transaction is marked as "aborted" and a ROLLBACK is required |
| 892 | // before other queries are permitted. For compatibility reasons, pessimistically |
| 893 | // require a ROLLBACK query (not using SAVEPOINT) before allowing other queries. |
| 894 | $ex = $this->getQueryException( $error, $errno, $sql->getSQL(), $fname ); |
| 895 | $this->transactionManager->setTransactionError( $ex ); |
| 896 | $errflags |= self::ERR_ABORT_TRX; |
| 897 | } else { |
| 898 | // Some other error occurred during the query, without a transaction... |
| 899 | $errflags |= self::ERR_ABORT_QUERY; |
| 900 | } |
| 901 | |
| 902 | return $errflags; |
| 903 | } |
| 904 | |
| 905 | /** |
| 906 | * @param string $sql |
| 907 | * @param string $fname |
| 908 | * @return string |
| 909 | */ |
| 910 | private function makeCommentedSql( $sql, $fname ): string { |
| 911 | // Add trace comment to the begin of the sql string, right after the operator. |
| 912 | // Or, for one-word queries (like "BEGIN" or COMMIT") add it to the end (T44598). |
| 913 | // NOTE: Don't add varying ids such as request id or session id to the comment. |
| 914 | // It would break aggregation of similar queries in analysis tools (see T193050#7512149) |
| 915 | $encName = preg_replace( '/[\x00-\x1F\/]/', '-', "$fname {$this->agent}" ); |
| 916 | return preg_replace( '/\s|$/', " /* $encName */ ", $sql, 1 ); |
| 917 | } |
| 918 | |
| 919 | /** |
| 920 | * Start an implicit transaction if DBO_TRX is enabled and no transaction is active |
| 921 | * |
| 922 | * @param Query $sql SQL statement |
| 923 | * @param string $fname |
| 924 | * @param int $flags Bit field of ISQLPlatform::QUERY_* constants |
| 925 | * @return bool Whether an implicit transaction was started |
| 926 | * @throws DBError |
| 927 | */ |
| 928 | private function beginIfImplied( $sql, $fname, $flags ) { |
| 929 | if ( !$this->trxLevel() && $this->flagsHolder->hasApplicableImplicitTrxFlag( $flags ) ) { |
| 930 | if ( $this->platform->isTransactableQuery( $sql ) ) { |
| 931 | $this->begin( __METHOD__ . " ($fname)", self::TRANSACTION_INTERNAL ); |
| 932 | $this->transactionManager->turnOnAutomatic(); |
| 933 | |
| 934 | return true; |
| 935 | } |
| 936 | } |
| 937 | |
| 938 | return false; |
| 939 | } |
| 940 | |
| 941 | /** |
| 942 | * Check if the given query is appropriate to run in a public context |
| 943 | * |
| 944 | * The caller is assumed to come from outside Database. |
| 945 | * In order to keep the DB handle's session state tracking in sync, certain queries |
| 946 | * like "USE", "BEGIN", "COMMIT", and "ROLLBACK" must not be issued directly from |
| 947 | * outside callers. Such commands should only be issued through dedicated methods |
| 948 | * like selectDomain(), begin(), commit(), and rollback(), respectively. |
| 949 | * |
| 950 | * This also checks if the session state tracking was corrupted by a prior exception. |
| 951 | * |
| 952 | * @param string $verb |
| 953 | * @param string $fname |
| 954 | * @throws DBUnexpectedError |
| 955 | * @throws DBTransactionStateError |
| 956 | */ |
| 957 | private function assertQueryIsCurrentlyAllowed( string $verb, string $fname ) { |
| 958 | if ( $verb === 'USE' ) { |
| 959 | throw new DBUnexpectedError( $this, "Got USE query; use selectDomain() instead" ); |
| 960 | } |
| 961 | |
| 962 | if ( $verb === 'ROLLBACK' ) { |
| 963 | // Whole transaction rollback is used for recovery |
| 964 | // @TODO: T269161; prevent "BEGIN"/"COMMIT"/"ROLLBACK" from outside callers |
| 965 | return; |
| 966 | } |
| 967 | |
| 968 | if ( $this->csmError ) { |
| 969 | throw new DBTransactionStateError( |
| 970 | $this, |
| 971 | "Cannot execute query from $fname while session state is out of sync", |
| 972 | [], |
| 973 | $this->csmError |
| 974 | ); |
| 975 | } |
| 976 | |
| 977 | $this->transactionManager->assertSessionStatus( $this, $fname ); |
| 978 | |
| 979 | if ( $verb !== 'ROLLBACK TO SAVEPOINT' ) { |
| 980 | $this->transactionManager->assertTransactionStatus( |
| 981 | $this, |
| 982 | $this->deprecationLogger, |
| 983 | $fname |
| 984 | ); |
| 985 | } |
| 986 | } |
| 987 | |
| 988 | /** |
| 989 | * Determine how to handle a connection lost discovered during a query attempt |
| 990 | * |
| 991 | * This checks if explicit transactions, pending transaction writes, and important |
| 992 | * session-level state (locks, temp tables) was lost. Point-in-time read snapshot loss |
| 993 | * is considered acceptable for DBO_TRX logic. |
| 994 | * |
| 995 | * If state was lost, but that loss was discovered during a ROLLBACK that would have |
| 996 | * destroyed that state anyway, treat the error as recoverable. |
| 997 | * |
| 998 | * @param string $verb SQL query verb |
| 999 | * @param float $walltime How many seconds passes while attempting the query |
| 1000 | * @param CriticalSessionInfo $priorSessInfo Session state just before the query |
| 1001 | * @return int Recovery approach. One of the following ERR_* class constants: |
| 1002 | * - Database::ERR_RETRY_QUERY: reconnect silently, retry query |
| 1003 | * - Database::ERR_ABORT_QUERY: reconnect silently, do not retry query |
| 1004 | * - Database::ERR_ABORT_TRX: reconnect, throw error, enforce transaction rollback |
| 1005 | * - Database::ERR_ABORT_SESSION: reconnect, throw error, enforce session rollback |
| 1006 | */ |
| 1007 | private function assessConnectionLoss( |
| 1008 | string $verb, |
| 1009 | float $walltime, |
| 1010 | CriticalSessionInfo $priorSessInfo |
| 1011 | ) { |
| 1012 | if ( $walltime < self::DROPPED_CONN_BLAME_THRESHOLD_SEC ) { |
| 1013 | // Query failed quickly; the connection was probably lost before the query was sent |
| 1014 | $res = self::ERR_RETRY_QUERY; |
| 1015 | } else { |
| 1016 | // Query took a long time; the connection was probably lost during query execution |
| 1017 | $res = self::ERR_ABORT_QUERY; |
| 1018 | } |
| 1019 | |
| 1020 | // List of problems causing session/transaction state corruption |
| 1021 | $blockers = []; |
| 1022 | // Loss of named locks breaks future callers relying on those locks for critical sections |
| 1023 | foreach ( $priorSessInfo->namedLocks as $lockName => $lockInfo ) { |
| 1024 | if ( $lockInfo['trxId'] && $lockInfo['trxId'] === $priorSessInfo->trxId ) { |
| 1025 | // Treat lost locks acquired during the lost transaction as a transaction state |
| 1026 | // problem. Connection loss on ROLLBACK (non-SAVEPOINT) is tolerable since |
| 1027 | // rollback automatically triggered server-side. |
| 1028 | if ( $verb !== 'ROLLBACK' ) { |
| 1029 | $res = max( $res, self::ERR_ABORT_TRX ); |
| 1030 | $blockers[] = "named lock '$lockName'"; |
| 1031 | } |
| 1032 | } else { |
| 1033 | // Treat lost locks acquired either during prior transactions or during no |
| 1034 | // transaction as a session state problem. |
| 1035 | $res = max( $res, self::ERR_ABORT_SESSION ); |
| 1036 | $blockers[] = "named lock '$lockName'"; |
| 1037 | } |
| 1038 | } |
| 1039 | // Loss of temp tables breaks future callers relying on those tables for queries |
| 1040 | foreach ( $priorSessInfo->tempTables as $domainTempTables ) { |
| 1041 | foreach ( $domainTempTables as $tableName => $tableInfo ) { |
| 1042 | if ( $tableInfo->trxId && $tableInfo->trxId === $priorSessInfo->trxId ) { |
| 1043 | // Treat lost temp tables created during the lost transaction as a |
| 1044 | // transaction state problem. Connection loss on ROLLBACK (non-SAVEPOINT) |
| 1045 | // is tolerable since rollback automatically triggered server-side. |
| 1046 | if ( $verb !== 'ROLLBACK' ) { |
| 1047 | $res = max( $res, self::ERR_ABORT_TRX ); |
| 1048 | $blockers[] = "temp table '$tableName'"; |
| 1049 | } |
| 1050 | } else { |
| 1051 | // Treat lost temp tables created either during prior transactions or during |
| 1052 | // no transaction as a session state problem. |
| 1053 | $res = max( $res, self::ERR_ABORT_SESSION ); |
| 1054 | $blockers[] = "temp table '$tableName'"; |
| 1055 | } |
| 1056 | } |
| 1057 | } |
| 1058 | // Loss of transaction writes breaks future callers and DBO_TRX logic relying on those |
| 1059 | // writes to be atomic and still pending. Connection loss on ROLLBACK (non-SAVEPOINT) is |
| 1060 | // tolerable since rollback automatically triggered server-side. |
| 1061 | if ( $priorSessInfo->trxWriteCallers && $verb !== 'ROLLBACK' ) { |
| 1062 | $res = max( $res, self::ERR_ABORT_TRX ); |
| 1063 | $blockers[] = 'uncommitted writes'; |
| 1064 | } |
| 1065 | if ( $priorSessInfo->trxPreCommitCbCallers && $verb !== 'ROLLBACK' ) { |
| 1066 | $res = max( $res, self::ERR_ABORT_TRX ); |
| 1067 | $blockers[] = 'pre-commit callbacks'; |
| 1068 | } |
| 1069 | if ( $priorSessInfo->trxExplicit && $verb !== 'ROLLBACK' && $verb !== 'COMMIT' ) { |
| 1070 | // Transaction automatically rolled back, breaking the expectations of callers |
| 1071 | // relying on that transaction to provide atomic writes, serializability, or use |
| 1072 | // one point-in-time snapshot for all reads. Assume that connection loss is OK |
| 1073 | // with ROLLBACK (non-SAVEPOINT). Likewise for COMMIT (T127428). |
| 1074 | $res = max( $res, self::ERR_ABORT_TRX ); |
| 1075 | $blockers[] = 'explicit transaction'; |
| 1076 | } |
| 1077 | |
| 1078 | if ( $blockers ) { |
| 1079 | $this->logger->warning( |
| 1080 | "cannot reconnect to {db_server} silently: {error}", |
| 1081 | $this->getLogContext( [ |
| 1082 | 'error' => 'session state loss (' . implode( ', ', $blockers ) . ')', |
| 1083 | 'exception' => new RuntimeException(), |
| 1084 | 'db_log_category' => 'connection' |
| 1085 | ] ) |
| 1086 | ); |
| 1087 | } |
| 1088 | |
| 1089 | return $res; |
| 1090 | } |
| 1091 | |
| 1092 | /** |
| 1093 | * Clean things up after session (and thus transaction) loss before reconnect |
| 1094 | */ |
| 1095 | private function handleSessionLossPreconnect() { |
| 1096 | // Clean up tracking of session-level things... |
| 1097 | // https://mariadb.com/kb/en/create-table/#create-temporary-table |
| 1098 | // https://www.postgresql.org/docs/9.2/static/sql-createtable.html (ignoring ON COMMIT) |
| 1099 | $this->sessionTempTables = []; |
| 1100 | // https://mariadb.com/kb/en/get_lock/ |
| 1101 | // https://www.postgresql.org/docs/9.4/static/functions-admin.html#FUNCTIONS-ADVISORY-LOCKS |
| 1102 | $this->sessionNamedLocks = []; |
| 1103 | // Session loss implies transaction loss (T67263) |
| 1104 | $this->transactionManager->clearPreEndCallbacks(); |
| 1105 | // Clear additional subclass fields |
| 1106 | $oldTrxId = $this->transactionManager->consumeTrxId(); |
| 1107 | $this->doHandleSessionLossPreconnect(); |
| 1108 | $this->transactionManager->transactionWritingOut( $this, (string)$oldTrxId ); |
| 1109 | } |
| 1110 | |
| 1111 | /** |
| 1112 | * Reset any additional subclass trx* and session* fields |
| 1113 | */ |
| 1114 | protected function doHandleSessionLossPreconnect() { |
| 1115 | // no-op |
| 1116 | } |
| 1117 | |
| 1118 | /** |
| 1119 | * Checks whether the cause of the error is detected to be a timeout. |
| 1120 | * |
| 1121 | * It returns false by default, and not all engines support detecting this yet. |
| 1122 | * If this returns false, it will be treated as a generic query error. |
| 1123 | * |
| 1124 | * @param int|string $errno Error number |
| 1125 | * @return bool |
| 1126 | * @since 1.39 |
| 1127 | */ |
| 1128 | protected function isQueryTimeoutError( $errno ) { |
| 1129 | return false; |
| 1130 | } |
| 1131 | |
| 1132 | /** |
| 1133 | * Report a query error |
| 1134 | * |
| 1135 | * If $ignore is set, emit a DEBUG level log entry and continue, |
| 1136 | * otherwise, emit an ERROR level log entry and throw an exception. |
| 1137 | * |
| 1138 | * @param string $error |
| 1139 | * @param int|string $errno |
| 1140 | * @param string $sql |
| 1141 | * @param string $fname |
| 1142 | * @param bool $ignore Whether to just log an error rather than throw an exception |
| 1143 | * @throws DBQueryError |
| 1144 | */ |
| 1145 | public function reportQueryError( $error, $errno, $sql, $fname, $ignore = false ) { |
| 1146 | if ( $ignore ) { |
| 1147 | $this->logger->debug( |
| 1148 | "SQL ERROR (ignored): $error", |
| 1149 | [ 'db_log_category' => 'query' ] |
| 1150 | ); |
| 1151 | } else { |
| 1152 | throw $this->getQueryExceptionAndLog( $error, $errno, $sql, $fname ); |
| 1153 | } |
| 1154 | } |
| 1155 | |
| 1156 | /** |
| 1157 | * @param string $error |
| 1158 | * @param string|int $errno |
| 1159 | * @param string $sql |
| 1160 | * @param string $fname |
| 1161 | * @return DBError |
| 1162 | */ |
| 1163 | private function getQueryExceptionAndLog( $error, $errno, $sql, $fname ) { |
| 1164 | // Information that instances of the same problem have in common should |
| 1165 | // not be normalized (T255202). |
| 1166 | $this->logger->error( |
| 1167 | "Error $errno from $fname, {error} {sql1line} {db_server}", |
| 1168 | $this->getLogContext( [ |
| 1169 | 'method' => __METHOD__, |
| 1170 | 'errno' => $errno, |
| 1171 | 'error' => $error, |
| 1172 | 'sql1line' => mb_substr( str_replace( "\n", "\\n", $sql ), 0, 5 * 1024 ), |
| 1173 | 'fname' => $fname, |
| 1174 | 'db_log_category' => 'query', |
| 1175 | 'exception' => new RuntimeException() |
| 1176 | ] ) |
| 1177 | ); |
| 1178 | return $this->getQueryException( $error, $errno, $sql, $fname ); |
| 1179 | } |
| 1180 | |
| 1181 | /** |
| 1182 | * @param string $error |
| 1183 | * @param string|int $errno |
| 1184 | * @param string $sql |
| 1185 | * @param string $fname |
| 1186 | * @return DBError |
| 1187 | */ |
| 1188 | private function getQueryException( $error, $errno, $sql, $fname ) { |
| 1189 | if ( $this->isQueryTimeoutError( $errno ) ) { |
| 1190 | return new DBQueryTimeoutError( $this, $error, $errno, $sql, $fname ); |
| 1191 | } elseif ( $this->isConnectionError( $errno ) ) { |
| 1192 | return new DBQueryDisconnectedError( $this, $error, $errno, $sql, $fname ); |
| 1193 | } else { |
| 1194 | return new DBQueryError( $this, $error, $errno, $sql, $fname ); |
| 1195 | } |
| 1196 | } |
| 1197 | |
| 1198 | /** |
| 1199 | * @param string $error |
| 1200 | * @return DBConnectionError |
| 1201 | */ |
| 1202 | final protected function newExceptionAfterConnectError( $error ) { |
| 1203 | // Connection was not fully initialized and is not safe for use. |
| 1204 | // Stash any error associated with the handle before destroying it. |
| 1205 | $this->lastConnectError = $error; |
| 1206 | $this->conn = null; |
| 1207 | |
| 1208 | $this->logger->error( |
| 1209 | "Error connecting to {db_server} as user {db_user}: {error}", |
| 1210 | $this->getLogContext( [ |
| 1211 | 'error' => $error, |
| 1212 | 'exception' => new RuntimeException(), |
| 1213 | 'db_log_category' => 'connection', |
| 1214 | ] ) |
| 1215 | ); |
| 1216 | |
| 1217 | return new DBConnectionError( $this, $error ); |
| 1218 | } |
| 1219 | |
| 1220 | /** |
| 1221 | * Get a SelectQueryBuilder bound to this connection. This is overridden by |
| 1222 | * DBConnRef. |
| 1223 | * |
| 1224 | * @return SelectQueryBuilder |
| 1225 | */ |
| 1226 | public function newSelectQueryBuilder(): SelectQueryBuilder { |
| 1227 | return new SelectQueryBuilder( $this ); |
| 1228 | } |
| 1229 | |
| 1230 | /** |
| 1231 | * Get a UnionQueryBuilder bound to this connection. This is overridden by |
| 1232 | * DBConnRef. |
| 1233 | * |
| 1234 | * @return UnionQueryBuilder |
| 1235 | */ |
| 1236 | public function newUnionQueryBuilder(): UnionQueryBuilder { |
| 1237 | return new UnionQueryBuilder( $this ); |
| 1238 | } |
| 1239 | |
| 1240 | /** |
| 1241 | * Get an UpdateQueryBuilder bound to this connection. This is overridden by |
| 1242 | * DBConnRef. |
| 1243 | * |
| 1244 | * @return UpdateQueryBuilder |
| 1245 | */ |
| 1246 | public function newUpdateQueryBuilder(): UpdateQueryBuilder { |
| 1247 | return new UpdateQueryBuilder( $this ); |
| 1248 | } |
| 1249 | |
| 1250 | /** |
| 1251 | * Get a DeleteQueryBuilder bound to this connection. This is overridden by |
| 1252 | * DBConnRef. |
| 1253 | * |
| 1254 | * @return DeleteQueryBuilder |
| 1255 | */ |
| 1256 | public function newDeleteQueryBuilder(): DeleteQueryBuilder { |
| 1257 | return new DeleteQueryBuilder( $this ); |
| 1258 | } |
| 1259 | |
| 1260 | /** |
| 1261 | * Get a InsertQueryBuilder bound to this connection. This is overridden by |
| 1262 | * DBConnRef. |
| 1263 | * |
| 1264 | * @return InsertQueryBuilder |
| 1265 | */ |
| 1266 | public function newInsertQueryBuilder(): InsertQueryBuilder { |
| 1267 | return new InsertQueryBuilder( $this ); |
| 1268 | } |
| 1269 | |
| 1270 | /** |
| 1271 | * Get a ReplaceQueryBuilder bound to this connection. This is overridden by |
| 1272 | * DBConnRef. |
| 1273 | * |
| 1274 | * @return ReplaceQueryBuilder |
| 1275 | */ |
| 1276 | public function newReplaceQueryBuilder(): ReplaceQueryBuilder { |
| 1277 | return new ReplaceQueryBuilder( $this ); |
| 1278 | } |
| 1279 | |
| 1280 | public function selectField( |
| 1281 | $tables, $var, $cond = '', $fname = __METHOD__, $options = [], $join_conds = [] |
| 1282 | ) { |
| 1283 | if ( $var === '*' ) { |
| 1284 | throw new DBUnexpectedError( $this, "Cannot use a * field" ); |
| 1285 | } elseif ( is_array( $var ) && count( $var ) !== 1 ) { |
| 1286 | throw new DBUnexpectedError( $this, 'Cannot use more than one field' ); |
| 1287 | } |
| 1288 | |
| 1289 | $options = $this->platform->normalizeOptions( $options ); |
| 1290 | $options['LIMIT'] = 1; |
| 1291 | |
| 1292 | $res = $this->select( $tables, $var, $cond, $fname, $options, $join_conds ); |
| 1293 | if ( $res === false ) { |
| 1294 | throw new DBUnexpectedError( $this, "Got false from select()" ); |
| 1295 | } |
| 1296 | |
| 1297 | $row = $res->fetchRow(); |
| 1298 | if ( $row === false ) { |
| 1299 | return false; |
| 1300 | } |
| 1301 | |
| 1302 | return reset( $row ); |
| 1303 | } |
| 1304 | |
| 1305 | public function selectFieldValues( |
| 1306 | $tables, $var, $cond = '', $fname = __METHOD__, $options = [], $join_conds = [] |
| 1307 | ): array { |
| 1308 | if ( $var === '*' ) { |
| 1309 | throw new DBUnexpectedError( $this, "Cannot use a * field" ); |
| 1310 | } elseif ( !is_string( $var ) ) { |
| 1311 | throw new DBUnexpectedError( $this, "Cannot use an array of fields" ); |
| 1312 | } |
| 1313 | |
| 1314 | $options = $this->platform->normalizeOptions( $options ); |
| 1315 | $res = $this->select( $tables, [ 'value' => $var ], $cond, $fname, $options, $join_conds ); |
| 1316 | if ( $res === false ) { |
| 1317 | throw new DBUnexpectedError( $this, "Got false from select()" ); |
| 1318 | } |
| 1319 | |
| 1320 | $values = []; |
| 1321 | foreach ( $res as $row ) { |
| 1322 | $values[] = $row->value; |
| 1323 | } |
| 1324 | |
| 1325 | return $values; |
| 1326 | } |
| 1327 | |
| 1328 | public function select( |
| 1329 | $tables, $vars, $conds = '', $fname = __METHOD__, $options = [], $join_conds = [] |
| 1330 | ) { |
| 1331 | $options = (array)$options; |
| 1332 | // Don't turn this into using platform directly, DatabaseMySQL overrides this. |
| 1333 | $sql = $this->selectSQLText( $tables, $vars, $conds, $fname, $options, $join_conds ); |
| 1334 | // Treat SELECT queries with FOR UPDATE as writes. This matches |
| 1335 | // how MySQL enforces read_only (FOR SHARE and LOCK IN SHADE MODE are allowed). |
| 1336 | $flags = in_array( 'FOR UPDATE', $options, true ) |
| 1337 | ? self::QUERY_CHANGE_ROWS |
| 1338 | : self::QUERY_CHANGE_NONE; |
| 1339 | |
| 1340 | $query = new Query( $sql, $flags, 'SELECT' ); |
| 1341 | return $this->query( $query, $fname ); |
| 1342 | } |
| 1343 | |
| 1344 | public function selectRow( $tables, $vars, $conds, $fname = __METHOD__, |
| 1345 | $options = [], $join_conds = [] |
| 1346 | ) { |
| 1347 | $options = (array)$options; |
| 1348 | $options['LIMIT'] = 1; |
| 1349 | |
| 1350 | $res = $this->select( $tables, $vars, $conds, $fname, $options, $join_conds ); |
| 1351 | if ( $res === false ) { |
| 1352 | throw new DBUnexpectedError( $this, "Got false from select()" ); |
| 1353 | } |
| 1354 | |
| 1355 | if ( !$res->numRows() ) { |
| 1356 | return false; |
| 1357 | } |
| 1358 | |
| 1359 | return $res->fetchObject(); |
| 1360 | } |
| 1361 | |
| 1362 | /** |
| 1363 | * @inheritDoc |
| 1364 | */ |
| 1365 | public function estimateRowCount( |
| 1366 | $tables, $var = '*', $conds = '', $fname = __METHOD__, $options = [], $join_conds = [] |
| 1367 | ): int { |
| 1368 | $conds = $this->platform->normalizeConditions( $conds, $fname ); |
| 1369 | $column = $this->platform->extractSingleFieldFromList( $var ); |
| 1370 | if ( is_string( $column ) && !in_array( $column, [ '*', '1' ] ) ) { |
| 1371 | $conds[] = "$column IS NOT NULL"; |
| 1372 | } |
| 1373 | |
| 1374 | $res = $this->select( |
| 1375 | $tables, [ 'rowcount' => 'COUNT(*)' ], $conds, $fname, $options, $join_conds |
| 1376 | ); |
| 1377 | $row = $res ? $res->fetchRow() : []; |
| 1378 | |
| 1379 | return isset( $row['rowcount'] ) ? (int)$row['rowcount'] : 0; |
| 1380 | } |
| 1381 | |
| 1382 | public function selectRowCount( |
| 1383 | $tables, $var = '*', $conds = '', $fname = __METHOD__, $options = [], $join_conds = [] |
| 1384 | ): int { |
| 1385 | $conds = $this->platform->normalizeConditions( $conds, $fname ); |
| 1386 | $column = $this->platform->extractSingleFieldFromList( $var ); |
| 1387 | if ( is_string( $column ) && !in_array( $column, [ '*', '1' ] ) ) { |
| 1388 | $conds[] = "$column IS NOT NULL"; |
| 1389 | } |
| 1390 | if ( in_array( 'DISTINCT', (array)$options ) ) { |
| 1391 | if ( $column === null ) { |
| 1392 | throw new DBUnexpectedError( $this, |
| 1393 | '$var cannot be empty when the DISTINCT option is given' ); |
| 1394 | } |
| 1395 | $innerVar = $column; |
| 1396 | } else { |
| 1397 | $innerVar = '1'; |
| 1398 | } |
| 1399 | |
| 1400 | $res = $this->select( |
| 1401 | [ |
| 1402 | 'tmp_count' => $this->platform->buildSelectSubquery( |
| 1403 | $tables, |
| 1404 | $innerVar, |
| 1405 | $conds, |
| 1406 | $fname, |
| 1407 | $options, |
| 1408 | $join_conds |
| 1409 | ) |
| 1410 | ], |
| 1411 | [ 'rowcount' => 'COUNT(*)' ], |
| 1412 | [], |
| 1413 | $fname |
| 1414 | ); |
| 1415 | $row = $res ? $res->fetchRow() : []; |
| 1416 | |
| 1417 | return isset( $row['rowcount'] ) ? (int)$row['rowcount'] : 0; |
| 1418 | } |
| 1419 | |
| 1420 | public function lockForUpdate( |
| 1421 | $table, $conds = '', $fname = __METHOD__, $options = [], $join_conds = [] |
| 1422 | ) { |
| 1423 | if ( !$this->trxLevel() && !$this->flagsHolder->hasImplicitTrxFlag() ) { |
| 1424 | throw new DBUnexpectedError( |
| 1425 | $this, |
| 1426 | __METHOD__ . ': no transaction is active nor is DBO_TRX set' |
| 1427 | ); |
| 1428 | } |
| 1429 | |
| 1430 | $options = (array)$options; |
| 1431 | $options[] = 'FOR UPDATE'; |
| 1432 | |
| 1433 | return $this->selectRowCount( $table, '*', $conds, $fname, $options, $join_conds ); |
| 1434 | } |
| 1435 | |
| 1436 | public function fieldExists( $table, $field, $fname = __METHOD__ ) { |
| 1437 | $info = $this->fieldInfo( $table, $field ); |
| 1438 | |
| 1439 | return (bool)$info; |
| 1440 | } |
| 1441 | |
| 1442 | abstract public function tableExists( $table, $fname = __METHOD__ ); |
| 1443 | |
| 1444 | public function indexExists( $table, $index, $fname = __METHOD__ ) { |
| 1445 | $info = $this->indexInfo( $table, $index, $fname ); |
| 1446 | |
| 1447 | return (bool)$info; |
| 1448 | } |
| 1449 | |
| 1450 | public function indexUnique( $table, $index, $fname = __METHOD__ ) { |
| 1451 | $info = $this->indexInfo( $table, $index, $fname ); |
| 1452 | |
| 1453 | return $info ? $info['unique'] : null; |
| 1454 | } |
| 1455 | |
| 1456 | /** |
| 1457 | * Get information about an index into an object |
| 1458 | * |
| 1459 | * @param string $table Unqualified name of table |
| 1460 | * @param string $index Index name |
| 1461 | * @param string $fname Calling function name |
| 1462 | * @return array<string,mixed>|false Index info map; false if it does not exist |
| 1463 | * @phan-return array{unique:bool}|false |
| 1464 | */ |
| 1465 | abstract public function indexInfo( $table, $index, $fname = __METHOD__ ); |
| 1466 | |
| 1467 | public function insert( $table, $rows, $fname = __METHOD__, $options = [] ) { |
| 1468 | $query = $this->platform->dispatchingInsertSqlText( $table, $rows, $options ); |
| 1469 | if ( !$query ) { |
| 1470 | return true; |
| 1471 | } |
| 1472 | $this->query( $query, $fname ); |
| 1473 | if ( $this->strictWarnings ) { |
| 1474 | $this->checkInsertWarnings( $query, $fname ); |
| 1475 | } |
| 1476 | return true; |
| 1477 | } |
| 1478 | |
| 1479 | /** |
| 1480 | * Check for warnings after performing an INSERT query, and throw exceptions |
| 1481 | * if necessary. |
| 1482 | * |
| 1483 | * @param Query $query |
| 1484 | * @param string $fname |
| 1485 | * @return void |
| 1486 | */ |
| 1487 | protected function checkInsertWarnings( Query $query, $fname ) { |
| 1488 | } |
| 1489 | |
| 1490 | public function update( $table, $set, $conds, $fname = __METHOD__, $options = [] ) { |
| 1491 | $query = $this->platform->updateSqlText( $table, $set, $conds, $options ); |
| 1492 | $this->query( $query, $fname ); |
| 1493 | |
| 1494 | return true; |
| 1495 | } |
| 1496 | |
| 1497 | public function databasesAreIndependent() { |
| 1498 | return false; |
| 1499 | } |
| 1500 | |
| 1501 | final public function selectDomain( $domain ) { |
| 1502 | $cs = $this->commenceCriticalSection( __METHOD__ ); |
| 1503 | |
| 1504 | try { |
| 1505 | $this->doSelectDomain( DatabaseDomain::newFromId( $domain ) ); |
| 1506 | } catch ( DBError $e ) { |
| 1507 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 1508 | throw $e; |
| 1509 | } |
| 1510 | |
| 1511 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 1512 | } |
| 1513 | |
| 1514 | /** |
| 1515 | * @param DatabaseDomain $domain |
| 1516 | * @throws DBConnectionError |
| 1517 | * @throws DBError |
| 1518 | * @since 1.32 |
| 1519 | */ |
| 1520 | protected function doSelectDomain( DatabaseDomain $domain ) { |
| 1521 | $this->currentDomain = $domain; |
| 1522 | $this->platform->setCurrentDomain( $this->currentDomain ); |
| 1523 | } |
| 1524 | |
| 1525 | public function getDBname() { |
| 1526 | return $this->currentDomain->getDatabase(); |
| 1527 | } |
| 1528 | |
| 1529 | public function getServer() { |
| 1530 | return $this->connectionParams[self::CONN_HOST] ?? null; |
| 1531 | } |
| 1532 | |
| 1533 | public function getServerName() { |
| 1534 | return $this->serverName ?? $this->getServer() ?? 'unknown'; |
| 1535 | } |
| 1536 | |
| 1537 | public function addQuotes( $s ) { |
| 1538 | if ( $s instanceof RawSQLValue ) { |
| 1539 | return $s->toSql(); |
| 1540 | } |
| 1541 | if ( $s instanceof Blob ) { |
| 1542 | $s = $s->fetch(); |
| 1543 | } |
| 1544 | if ( $s === null ) { |
| 1545 | return 'NULL'; |
| 1546 | } elseif ( is_bool( $s ) ) { |
| 1547 | return (string)(int)$s; |
| 1548 | } elseif ( is_int( $s ) ) { |
| 1549 | return (string)$s; |
| 1550 | } else { |
| 1551 | return "'" . $this->strencode( $s ) . "'"; |
| 1552 | } |
| 1553 | } |
| 1554 | |
| 1555 | public function expr( string $field, string $op, $value ): Expression { |
| 1556 | return new Expression( $field, $op, $value ); |
| 1557 | } |
| 1558 | |
| 1559 | public function andExpr( array $conds ): AndExpressionGroup { |
| 1560 | return AndExpressionGroup::newFromArray( $conds ); |
| 1561 | } |
| 1562 | |
| 1563 | public function orExpr( array $conds ): OrExpressionGroup { |
| 1564 | return OrExpressionGroup::newFromArray( $conds ); |
| 1565 | } |
| 1566 | |
| 1567 | public function replace( $table, $uniqueKeys, $rows, $fname = __METHOD__ ) { |
| 1568 | $uniqueKey = $this->platform->normalizeUpsertParams( $uniqueKeys, $rows ); |
| 1569 | if ( !$rows ) { |
| 1570 | return; |
| 1571 | } |
| 1572 | $affectedRowCount = 0; |
| 1573 | $insertId = null; |
| 1574 | $this->startAtomic( $fname, self::ATOMIC_CANCELABLE ); |
| 1575 | try { |
| 1576 | foreach ( $rows as $row ) { |
| 1577 | // Delete any conflicting rows (including ones inserted from $rows) |
| 1578 | $query = $this->platform->deleteSqlText( |
| 1579 | $table, |
| 1580 | [ $this->platform->makeKeyCollisionCondition( [ $row ], $uniqueKey ) ] |
| 1581 | ); |
| 1582 | $this->query( $query, $fname ); |
| 1583 | // Insert the new row |
| 1584 | $query = $this->platform->dispatchingInsertSqlText( $table, $row, [] ); |
| 1585 | $this->query( $query, $fname ); |
| 1586 | $affectedRowCount += $this->lastQueryAffectedRows; |
| 1587 | $insertId = $insertId ?: $this->lastQueryInsertId; |
| 1588 | } |
| 1589 | $this->endAtomic( $fname ); |
| 1590 | } catch ( DBError $e ) { |
| 1591 | $this->cancelAtomic( $fname ); |
| 1592 | throw $e; |
| 1593 | } |
| 1594 | $this->lastEmulatedAffectedRows = $affectedRowCount; |
| 1595 | $this->lastEmulatedInsertId = $insertId; |
| 1596 | } |
| 1597 | |
| 1598 | public function upsert( $table, array $rows, $uniqueKeys, array $set, $fname = __METHOD__ ) { |
| 1599 | $uniqueKey = $this->platform->normalizeUpsertParams( $uniqueKeys, $rows ); |
| 1600 | if ( !$rows ) { |
| 1601 | return true; |
| 1602 | } |
| 1603 | $this->platform->assertValidUpsertSetArray( $set, $uniqueKey, $rows ); |
| 1604 | |
| 1605 | $encTable = $this->tableName( $table ); |
| 1606 | $sqlColumnAssignments = $this->makeList( $set, self::LIST_SET ); |
| 1607 | // Get any AUTO_INCREMENT/SERIAL column for this table so we can set insertId() |
| 1608 | $autoIncrementColumn = $this->getInsertIdColumnForUpsert( $table ); |
| 1609 | // Check if there is a SQL assignment expression in $set (as generated by SQLPlatform::buildExcludedValue) |
| 1610 | $useWith = (bool)array_filter( |
| 1611 | $set, |
| 1612 | static function ( $v, $k ) { |
| 1613 | return $v instanceof RawSQLValue || is_int( $k ); |
| 1614 | }, |
| 1615 | ARRAY_FILTER_USE_BOTH |
| 1616 | ); |
| 1617 | // Subclasses might need explicit type casting within "WITH...AS (VALUES ...)" |
| 1618 | // so that these CTE rows can be referenced within the SET clause assigments. |
| 1619 | $typeByColumn = $useWith ? $this->getValueTypesForWithClause( $table ) : []; |
| 1620 | |
| 1621 | $first = true; |
| 1622 | $affectedRowCount = 0; |
| 1623 | $insertId = null; |
| 1624 | $this->startAtomic( $fname, self::ATOMIC_CANCELABLE ); |
| 1625 | try { |
| 1626 | foreach ( $rows as $row ) { |
| 1627 | // Update any existing conflicting row (including ones inserted from $rows) |
| 1628 | [ $sqlColumns, $sqlTuples, $sqlVals ] = $this->platform->makeInsertLists( |
| 1629 | [ $row ], |
| 1630 | '__', |
| 1631 | $typeByColumn |
| 1632 | ); |
| 1633 | $sqlConditions = $this->platform->makeKeyCollisionCondition( |
| 1634 | [ $row ], |
| 1635 | $uniqueKey |
| 1636 | ); |
| 1637 | $query = new Query( |
| 1638 | ( $useWith ? "WITH __VALS ($sqlVals) AS (VALUES $sqlTuples) " : "" ) . |
| 1639 | "UPDATE $encTable SET $sqlColumnAssignments " . |
| 1640 | "WHERE ($sqlConditions)", |
| 1641 | self::QUERY_CHANGE_ROWS, |
| 1642 | 'UPDATE', |
| 1643 | $table |
| 1644 | ); |
| 1645 | $this->query( $query, $fname ); |
| 1646 | $rowsUpdated = $this->lastQueryAffectedRows; |
| 1647 | $affectedRowCount += $rowsUpdated; |
| 1648 | if ( $rowsUpdated > 0 ) { |
| 1649 | // Conflicting row found and updated |
| 1650 | if ( $first && $autoIncrementColumn !== null ) { |
| 1651 | // @TODO: use "RETURNING" instead (when supported by SQLite) |
| 1652 | $query = new Query( |
| 1653 | "SELECT $autoIncrementColumn AS id FROM $encTable " . |
| 1654 | "WHERE ($sqlConditions)", |
| 1655 | self::QUERY_CHANGE_NONE, |
| 1656 | 'SELECT' |
| 1657 | ); |
| 1658 | $sRes = $this->query( $query, $fname, self::QUERY_CHANGE_ROWS ); |
| 1659 | $insertId = (int)$sRes->fetchRow()['id']; |
| 1660 | } |
| 1661 | } else { |
| 1662 | // No conflicting row found |
| 1663 | $query = new Query( |
| 1664 | "INSERT INTO $encTable ($sqlColumns) VALUES $sqlTuples", |
| 1665 | self::QUERY_CHANGE_ROWS, |
| 1666 | 'INSERT', |
| 1667 | $table |
| 1668 | ); |
| 1669 | $this->query( $query, $fname ); |
| 1670 | $affectedRowCount += $this->lastQueryAffectedRows; |
| 1671 | } |
| 1672 | $first = false; |
| 1673 | } |
| 1674 | $this->endAtomic( $fname ); |
| 1675 | } catch ( DBError $e ) { |
| 1676 | $this->cancelAtomic( $fname ); |
| 1677 | throw $e; |
| 1678 | } |
| 1679 | $this->lastEmulatedAffectedRows = $affectedRowCount; |
| 1680 | $this->lastEmulatedInsertId = $insertId; |
| 1681 | return true; |
| 1682 | } |
| 1683 | |
| 1684 | /** |
| 1685 | * @param string $table Unqualified name of table |
| 1686 | * @return string|null The AUTO_INCREMENT/SERIAL column; null if not needed |
| 1687 | */ |
| 1688 | protected function getInsertIdColumnForUpsert( $table ) { |
| 1689 | return null; |
| 1690 | } |
| 1691 | |
| 1692 | /** |
| 1693 | * @param string $table Unqualified name of table |
| 1694 | * @return array<string,string> Map of (column => type); [] if not needed |
| 1695 | */ |
| 1696 | protected function getValueTypesForWithClause( $table ) { |
| 1697 | return []; |
| 1698 | } |
| 1699 | |
| 1700 | public function deleteJoin( |
| 1701 | $delTable, |
| 1702 | $joinTable, |
| 1703 | $delVar, |
| 1704 | $joinVar, |
| 1705 | $conds, |
| 1706 | $fname = __METHOD__ |
| 1707 | ) { |
| 1708 | $sql = $this->platform->deleteJoinSqlText( $delTable, $joinTable, $delVar, $joinVar, $conds ); |
| 1709 | $query = new Query( $sql, self::QUERY_CHANGE_ROWS, 'DELETE', $delTable ); |
| 1710 | $this->query( $query, $fname ); |
| 1711 | } |
| 1712 | |
| 1713 | public function delete( $table, $conds, $fname = __METHOD__ ) { |
| 1714 | $this->query( $this->platform->deleteSqlText( $table, $conds ), $fname ); |
| 1715 | |
| 1716 | return true; |
| 1717 | } |
| 1718 | |
| 1719 | final public function insertSelect( |
| 1720 | $destTable, |
| 1721 | $srcTable, |
| 1722 | $varMap, |
| 1723 | $conds, |
| 1724 | $fname = __METHOD__, |
| 1725 | $insertOptions = [], |
| 1726 | $selectOptions = [], |
| 1727 | $selectJoinConds = [] |
| 1728 | ) { |
| 1729 | static $hints = [ 'NO_AUTO_COLUMNS' ]; |
| 1730 | |
| 1731 | $insertOptions = $this->platform->normalizeOptions( $insertOptions ); |
| 1732 | $selectOptions = $this->platform->normalizeOptions( $selectOptions ); |
| 1733 | |
| 1734 | if ( $this->cliMode && $this->isInsertSelectSafe( $insertOptions, $selectOptions, $fname ) ) { |
| 1735 | // For massive migrations with downtime, we don't want to select everything |
| 1736 | // into memory and OOM, so do all this native on the server side if possible. |
| 1737 | $this->doInsertSelectNative( |
| 1738 | $destTable, |
| 1739 | $srcTable, |
| 1740 | $varMap, |
| 1741 | $conds, |
| 1742 | $fname, |
| 1743 | array_diff( $insertOptions, $hints ), |
| 1744 | $selectOptions, |
| 1745 | $selectJoinConds |
| 1746 | ); |
| 1747 | } else { |
| 1748 | $this->doInsertSelectGeneric( |
| 1749 | $destTable, |
| 1750 | $srcTable, |
| 1751 | $varMap, |
| 1752 | $conds, |
| 1753 | $fname, |
| 1754 | array_diff( $insertOptions, $hints ), |
| 1755 | $selectOptions, |
| 1756 | $selectJoinConds |
| 1757 | ); |
| 1758 | } |
| 1759 | |
| 1760 | return true; |
| 1761 | } |
| 1762 | |
| 1763 | /** |
| 1764 | * @param array $insertOptions |
| 1765 | * @param array $selectOptions |
| 1766 | * @param string $fname |
| 1767 | * @return bool Whether an INSERT SELECT with these options will be replication safe |
| 1768 | * @since 1.31 |
| 1769 | */ |
| 1770 | protected function isInsertSelectSafe( array $insertOptions, array $selectOptions, $fname = __METHOD__ ) { |
| 1771 | return true; |
| 1772 | } |
| 1773 | |
| 1774 | /** |
| 1775 | * Implementation of insertSelect() based on select() and insert() |
| 1776 | * |
| 1777 | * @see IDatabase::insertSelect() |
| 1778 | * @param string $destTable Unqualified name of destination table |
| 1779 | * @param string|array $srcTable Unqualified name of source table |
| 1780 | * @param array $varMap |
| 1781 | * @param array $conds |
| 1782 | * @param string $fname |
| 1783 | * @param array $insertOptions |
| 1784 | * @param array $selectOptions |
| 1785 | * @param array $selectJoinConds |
| 1786 | * @since 1.35 |
| 1787 | */ |
| 1788 | private function doInsertSelectGeneric( |
| 1789 | $destTable, |
| 1790 | $srcTable, |
| 1791 | array $varMap, |
| 1792 | $conds, |
| 1793 | $fname, |
| 1794 | array $insertOptions, |
| 1795 | array $selectOptions, |
| 1796 | $selectJoinConds |
| 1797 | ) { |
| 1798 | // For web requests, do a locking SELECT and then INSERT. This puts the SELECT burden |
| 1799 | // on only the primary DB (without needing row-based-replication). It also makes it easy to |
| 1800 | // know how big the INSERT is going to be. |
| 1801 | $fields = []; |
| 1802 | foreach ( $varMap as $dstColumn => $sourceColumnOrSql ) { |
| 1803 | $fields[] = $this->platform->fieldNameWithAlias( $sourceColumnOrSql, $dstColumn ); |
| 1804 | } |
| 1805 | $res = $this->select( |
| 1806 | $srcTable, |
| 1807 | implode( ',', $fields ), |
| 1808 | $conds, |
| 1809 | $fname, |
| 1810 | array_merge( $selectOptions, [ 'FOR UPDATE' ] ), |
| 1811 | $selectJoinConds |
| 1812 | ); |
| 1813 | |
| 1814 | $affectedRowCount = 0; |
| 1815 | $insertId = null; |
| 1816 | if ( $res ) { |
| 1817 | $this->startAtomic( $fname, self::ATOMIC_CANCELABLE ); |
| 1818 | try { |
| 1819 | $rows = []; |
| 1820 | foreach ( $res as $row ) { |
| 1821 | $rows[] = (array)$row; |
| 1822 | } |
| 1823 | // Avoid inserts that are too huge |
| 1824 | $rowBatches = array_chunk( $rows, $this->nonNativeInsertSelectBatchSize ); |
| 1825 | foreach ( $rowBatches as $rows ) { |
| 1826 | $query = $this->platform->dispatchingInsertSqlText( $destTable, $rows, $insertOptions ); |
| 1827 | $this->query( $query, $fname ); |
| 1828 | $affectedRowCount += $this->lastQueryAffectedRows; |
| 1829 | $insertId = $insertId ?: $this->lastQueryInsertId; |
| 1830 | } |
| 1831 | $this->endAtomic( $fname ); |
| 1832 | } catch ( DBError $e ) { |
| 1833 | $this->cancelAtomic( $fname ); |
| 1834 | throw $e; |
| 1835 | } |
| 1836 | } |
| 1837 | $this->lastEmulatedAffectedRows = $affectedRowCount; |
| 1838 | $this->lastEmulatedInsertId = $insertId; |
| 1839 | } |
| 1840 | |
| 1841 | /** |
| 1842 | * Native server-side implementation of insertSelect() for situations where |
| 1843 | * we don't want to select everything into memory |
| 1844 | * |
| 1845 | * @see IDatabase::insertSelect() |
| 1846 | * @param string $destTable Unqualified name of destination table |
| 1847 | * @param string|array $srcTable Unqualified name of source table |
| 1848 | * @param array $varMap |
| 1849 | * @param array $conds |
| 1850 | * @param string $fname |
| 1851 | * @param array $insertOptions |
| 1852 | * @param array $selectOptions |
| 1853 | * @param array $selectJoinConds |
| 1854 | * @since 1.35 |
| 1855 | */ |
| 1856 | protected function doInsertSelectNative( |
| 1857 | $destTable, |
| 1858 | $srcTable, |
| 1859 | array $varMap, |
| 1860 | $conds, |
| 1861 | $fname, |
| 1862 | array $insertOptions, |
| 1863 | array $selectOptions, |
| 1864 | $selectJoinConds |
| 1865 | ) { |
| 1866 | $sql = $this->platform->insertSelectNativeSqlText( |
| 1867 | $destTable, |
| 1868 | $srcTable, |
| 1869 | $varMap, |
| 1870 | $conds, |
| 1871 | $fname, |
| 1872 | $insertOptions, |
| 1873 | $selectOptions, |
| 1874 | $selectJoinConds |
| 1875 | ); |
| 1876 | $query = new Query( |
| 1877 | $sql, |
| 1878 | self::QUERY_CHANGE_ROWS, |
| 1879 | 'INSERT', |
| 1880 | $destTable |
| 1881 | ); |
| 1882 | $this->query( $query, $fname ); |
| 1883 | } |
| 1884 | |
| 1885 | /** |
| 1886 | * Do not use this method outside of Database/DBError classes |
| 1887 | * |
| 1888 | * @param int|string $errno |
| 1889 | * @return bool Whether the given query error was a connection drop |
| 1890 | * @since 1.38 |
| 1891 | */ |
| 1892 | protected function isConnectionError( $errno ) { |
| 1893 | return false; |
| 1894 | } |
| 1895 | |
| 1896 | /** |
| 1897 | * @param int|string $errno |
| 1898 | * @return bool Whether it is known that the last query error only caused statement rollback |
| 1899 | * @note This is for backwards compatibility for callers catching DBError exceptions in |
| 1900 | * order to ignore problems like duplicate key errors or foreign key violations |
| 1901 | * @since 1.39 |
| 1902 | */ |
| 1903 | protected function isKnownStatementRollbackError( $errno ) { |
| 1904 | return false; // don't know; it could have caused a transaction rollback |
| 1905 | } |
| 1906 | |
| 1907 | /** |
| 1908 | * @inheritDoc |
| 1909 | */ |
| 1910 | public function serverIsReadOnly() { |
| 1911 | return false; |
| 1912 | } |
| 1913 | |
| 1914 | final public function onTransactionResolution( callable $callback, $fname = __METHOD__ ) { |
| 1915 | $this->transactionManager->onTransactionResolution( $this, $callback, $fname ); |
| 1916 | } |
| 1917 | |
| 1918 | final public function onTransactionCommitOrIdle( callable $callback, $fname = __METHOD__ ) { |
| 1919 | if ( !$this->trxLevel() && $this->getTransactionRoundId() ) { |
| 1920 | // This DB handle is set to participate in LoadBalancer transaction rounds and |
| 1921 | // an explicit transaction round is active. Start an implicit transaction on this |
| 1922 | // DB handle (setting trxAutomatic) similar to how query() does in such situations. |
| 1923 | $this->begin( __METHOD__, self::TRANSACTION_INTERNAL ); |
| 1924 | } |
| 1925 | |
| 1926 | $this->transactionManager->addPostCommitOrIdleCallback( $callback, $fname ); |
| 1927 | if ( !$this->trxLevel() ) { |
| 1928 | $dbErrors = []; |
| 1929 | $this->runOnTransactionIdleCallbacks( self::TRIGGER_IDLE, $dbErrors ); |
| 1930 | if ( $dbErrors ) { |
| 1931 | throw $dbErrors[0]; |
| 1932 | } |
| 1933 | } |
| 1934 | } |
| 1935 | |
| 1936 | final public function onTransactionPreCommitOrIdle( callable $callback, $fname = __METHOD__ ) { |
| 1937 | if ( !$this->trxLevel() && $this->getTransactionRoundId() ) { |
| 1938 | // This DB handle is set to participate in LoadBalancer transaction rounds and |
| 1939 | // an explicit transaction round is active. Start an implicit transaction on this |
| 1940 | // DB handle (setting trxAutomatic) similar to how query() does in such situations. |
| 1941 | $this->begin( __METHOD__, self::TRANSACTION_INTERNAL ); |
| 1942 | } |
| 1943 | |
| 1944 | if ( $this->trxLevel() ) { |
| 1945 | $this->transactionManager->addPreCommitOrIdleCallback( |
| 1946 | $callback, |
| 1947 | $fname |
| 1948 | ); |
| 1949 | } else { |
| 1950 | // No transaction is active nor will start implicitly, so make one for this callback |
| 1951 | $this->startAtomic( __METHOD__, self::ATOMIC_CANCELABLE ); |
| 1952 | try { |
| 1953 | $callback( $this ); |
| 1954 | } catch ( Throwable $e ) { |
| 1955 | // Avoid confusing error reporting during critical section errors |
| 1956 | if ( !$this->csmError ) { |
| 1957 | $this->cancelAtomic( __METHOD__ ); |
| 1958 | } |
| 1959 | throw $e; |
| 1960 | } |
| 1961 | $this->endAtomic( __METHOD__ ); |
| 1962 | } |
| 1963 | } |
| 1964 | |
| 1965 | final public function onAtomicSectionCancel( callable $callback, $fname = __METHOD__ ) { |
| 1966 | $this->transactionManager->onAtomicSectionCancel( $this, $callback, $fname ); |
| 1967 | } |
| 1968 | |
| 1969 | final public function setTransactionListener( $name, callable $callback = null ) { |
| 1970 | $this->transactionManager->setTransactionListener( $name, $callback ); |
| 1971 | } |
| 1972 | |
| 1973 | /** |
| 1974 | * Whether to disable running of post-COMMIT/ROLLBACK callbacks |
| 1975 | * |
| 1976 | * @internal This method should not be used outside of Database/LoadBalancer |
| 1977 | * |
| 1978 | * @since 1.28 |
| 1979 | * @param bool $suppress |
| 1980 | */ |
| 1981 | final public function setTrxEndCallbackSuppression( $suppress ) { |
| 1982 | $this->transactionManager->setTrxEndCallbackSuppression( $suppress ); |
| 1983 | } |
| 1984 | |
| 1985 | /** |
| 1986 | * Consume and run any "on transaction idle/resolution" callbacks |
| 1987 | * |
| 1988 | * @internal This method should not be used outside of Database/LoadBalancer |
| 1989 | * |
| 1990 | * @since 1.20 |
| 1991 | * @param int $trigger IDatabase::TRIGGER_* constant |
| 1992 | * @param DBError[] &$errors DB exceptions caught [returned] |
| 1993 | * @return int Number of callbacks attempted |
| 1994 | * @throws DBUnexpectedError |
| 1995 | * @throws Throwable Any non-DBError exception thrown by a callback |
| 1996 | */ |
| 1997 | public function runOnTransactionIdleCallbacks( $trigger, array &$errors = [] ) { |
| 1998 | if ( $this->trxLevel() ) { |
| 1999 | throw new DBUnexpectedError( $this, __METHOD__ . ': a transaction is still open' ); |
| 2000 | } |
| 2001 | |
| 2002 | if ( $this->transactionManager->isEndCallbacksSuppressed() ) { |
| 2003 | // Execution deferred by LoadBalancer for explicit execution later |
| 2004 | return 0; |
| 2005 | } |
| 2006 | |
| 2007 | $cs = $this->commenceCriticalSection( __METHOD__ ); |
| 2008 | |
| 2009 | $count = 0; |
| 2010 | $autoTrx = $this->flagsHolder->hasImplicitTrxFlag(); // automatic begin() enabled? |
| 2011 | // Drain the queues of transaction "idle" and "end" callbacks until they are empty |
| 2012 | do { |
| 2013 | $callbackEntries = $this->transactionManager->consumeEndCallbacks( $trigger ); |
| 2014 | $count += count( $callbackEntries ); |
| 2015 | foreach ( $callbackEntries as $entry ) { |
| 2016 | $this->flagsHolder->clearFlag( self::DBO_TRX ); // make each query its own transaction |
| 2017 | try { |
| 2018 | $entry[0]( $trigger, $this ); |
| 2019 | } catch ( DBError $ex ) { |
| 2020 | call_user_func( $this->errorLogger, $ex ); |
| 2021 | $errors[] = $ex; |
| 2022 | // Some callbacks may use startAtomic/endAtomic, so make sure |
| 2023 | // their transactions are ended so other callbacks don't fail |
| 2024 | if ( $this->trxLevel() ) { |
| 2025 | $this->rollback( __METHOD__, self::FLUSHING_INTERNAL ); |
| 2026 | } |
| 2027 | } finally { |
| 2028 | if ( $autoTrx ) { |
| 2029 | $this->flagsHolder->setFlag( self::DBO_TRX ); // restore automatic begin() |
| 2030 | } else { |
| 2031 | $this->flagsHolder->clearFlag( self::DBO_TRX ); // restore auto-commit |
| 2032 | } |
| 2033 | } |
| 2034 | } |
| 2035 | } while ( $this->transactionManager->countPostCommitOrIdleCallbacks() ); |
| 2036 | |
| 2037 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 2038 | |
| 2039 | return $count; |
| 2040 | } |
| 2041 | |
| 2042 | /** |
| 2043 | * Actually run any "transaction listener" callbacks |
| 2044 | * |
| 2045 | * @internal This method should not be used outside of Database/LoadBalancer |
| 2046 | * |
| 2047 | * @since 1.20 |
| 2048 | * @param int $trigger IDatabase::TRIGGER_* constant |
| 2049 | * @param DBError[] &$errors DB exceptions caught [returned] |
| 2050 | * @throws Throwable Any non-DBError exception thrown by a callback |
| 2051 | */ |
| 2052 | public function runTransactionListenerCallbacks( $trigger, array &$errors = [] ) { |
| 2053 | if ( $this->transactionManager->isEndCallbacksSuppressed() ) { |
| 2054 | // Execution deferred by LoadBalancer for explicit execution later |
| 2055 | return; |
| 2056 | } |
| 2057 | |
| 2058 | // These callbacks should only be registered in setup, thus no iteration is needed |
| 2059 | foreach ( $this->transactionManager->getRecurringCallbacks() as $callback ) { |
| 2060 | try { |
| 2061 | $callback( $trigger, $this ); |
| 2062 | } catch ( DBError $ex ) { |
| 2063 | ( $this->errorLogger )( $ex ); |
| 2064 | $errors[] = $ex; |
| 2065 | } |
| 2066 | } |
| 2067 | } |
| 2068 | |
| 2069 | /** |
| 2070 | * Handle "on transaction idle/resolution" and "transaction listener" callbacks post-COMMIT |
| 2071 | * |
| 2072 | * @throws DBError The first DBError exception thrown by a callback |
| 2073 | * @throws Throwable Any non-DBError exception thrown by a callback |
| 2074 | */ |
| 2075 | private function runTransactionPostCommitCallbacks() { |
| 2076 | $dbErrors = []; |
| 2077 | $this->runOnTransactionIdleCallbacks( self::TRIGGER_COMMIT, $dbErrors ); |
| 2078 | $this->runTransactionListenerCallbacks( self::TRIGGER_COMMIT, $dbErrors ); |
| 2079 | $this->lastEmulatedAffectedRows = 0; // for the sake of consistency |
| 2080 | if ( $dbErrors ) { |
| 2081 | throw $dbErrors[0]; |
| 2082 | } |
| 2083 | } |
| 2084 | |
| 2085 | /** |
| 2086 | * Handle "on transaction idle/resolution" and "transaction listener" callbacks post-ROLLBACK |
| 2087 | * |
| 2088 | * This will suppress and log any DBError exceptions |
| 2089 | * |
| 2090 | * @throws Throwable Any non-DBError exception thrown by a callback |
| 2091 | */ |
| 2092 | private function runTransactionPostRollbackCallbacks() { |
| 2093 | $this->runOnTransactionIdleCallbacks( self::TRIGGER_ROLLBACK ); |
| 2094 | $this->runTransactionListenerCallbacks( self::TRIGGER_ROLLBACK ); |
| 2095 | $this->lastEmulatedAffectedRows = 0; // for the sake of consistency |
| 2096 | } |
| 2097 | |
| 2098 | final public function startAtomic( |
| 2099 | $fname = __METHOD__, |
| 2100 | $cancelable = self::ATOMIC_NOT_CANCELABLE |
| 2101 | ) { |
| 2102 | $cs = $this->commenceCriticalSection( __METHOD__ ); |
| 2103 | |
| 2104 | if ( $this->trxLevel() ) { |
| 2105 | // This atomic section is only one part of a larger transaction |
| 2106 | $sectionOwnsTrx = false; |
| 2107 | } else { |
| 2108 | // Start an implicit transaction (sets trxAutomatic) |
| 2109 | try { |
| 2110 | $this->begin( $fname, self::TRANSACTION_INTERNAL ); |
| 2111 | } catch ( DBError $e ) { |
| 2112 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 2113 | throw $e; |
| 2114 | } |
| 2115 | if ( $this->flagsHolder->hasImplicitTrxFlag() ) { |
| 2116 | // This DB handle participates in LoadBalancer transaction rounds; all atomic |
| 2117 | // sections should be buffered into one transaction (e.g. to keep web requests |
| 2118 | // transactional). Note that an implicit transaction round is considered to be |
| 2119 | // active when no there is no explicit transaction round. |
| 2120 | $sectionOwnsTrx = false; |
| 2121 | } else { |
| 2122 | // This DB handle does not participate in LoadBalancer transaction rounds; |
| 2123 | // each topmost atomic section will use its own transaction. |
| 2124 | $sectionOwnsTrx = true; |
| 2125 | } |
| 2126 | $this->transactionManager->setAutomaticAtomic( $sectionOwnsTrx ); |
| 2127 | } |
| 2128 | |
| 2129 | if ( $cancelable === self::ATOMIC_CANCELABLE ) { |
| 2130 | if ( $sectionOwnsTrx ) { |
| 2131 | // This atomic section is synonymous with the whole transaction; just |
| 2132 | // use full COMMIT/ROLLBACK in endAtomic()/cancelAtomic(), respectively |
| 2133 | $savepointId = self::NOT_APPLICABLE; |
| 2134 | } else { |
| 2135 | // This atomic section is only part of the whole transaction; use a SAVEPOINT |
| 2136 | // query so that its changes can be cancelled without losing the rest of the |
| 2137 | // transaction (e.g. changes from other sections or from outside of sections) |
| 2138 | try { |
| 2139 | $savepointId = $this->transactionManager->nextSavePointId( $this, $fname ); |
| 2140 | $sql = $this->platform->savepointSqlText( $savepointId ); |
| 2141 | $query = new Query( $sql, self::QUERY_CHANGE_TRX, 'SAVEPOINT' ); |
| 2142 | $this->query( $query, $fname ); |
| 2143 | } catch ( DBError $e ) { |
| 2144 | $this->completeCriticalSection( __METHOD__, $cs, $e ); |
| 2145 | throw $e; |
| 2146 | } |
| 2147 | } |
| 2148 | } else { |
| 2149 | $savepointId = null; |
| 2150 | } |
| 2151 | |
| 2152 | $sectionId = new AtomicSectionIdentifier; |
| 2153 | $this->transactionManager->addToAtomicLevels( $fname, $sectionId, $savepointId ); |
| 2154 | |
| 2155 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 2156 | |
| 2157 | return $sectionId; |
| 2158 | } |
| 2159 | |
| 2160 | final public function endAtomic( $fname = __METHOD__ ) { |
| 2161 | [ $savepointId, $sectionId ] = $this->transactionManager->onEndAtomic( $this, $fname ); |
| 2162 | |
| 2163 | $runPostCommitCallbacks = false; |
| 2164 | |
| 2165 | $cs = $this->commenceCriticalSection( __METHOD__ ); |
| 2166 | |
| 2167 | // Remove the last section (no need to re-index the array) |
| 2168 | $this->transactionManager->popAtomicLevel(); |
| 2169 | |
| 2170 | try { |
| 2171 | if ( $this->transactionManager->isClean() ) { |
| 2172 | $this->commit( $fname, self::FLUSHING_INTERNAL ); |
| 2173 | $runPostCommitCallbacks = true; |
| 2174 | } elseif ( $savepointId !== null && $savepointId !== self::NOT_APPLICABLE ) { |
| 2175 | $sql = $this->platform->releaseSavepointSqlText( $savepointId ); |
| 2176 | $query = new Query( $sql, self::QUERY_CHANGE_TRX, 'RELEASE SAVEPOINT' ); |
| 2177 | $this->query( $query, $fname ); |
| 2178 | } |
| 2179 | } catch ( DBError $e ) { |
| 2180 | $this->completeCriticalSection( __METHOD__, $cs, $e ); |
| 2181 | throw $e; |
| 2182 | } |
| 2183 | |
| 2184 | $this->transactionManager->onEndAtomicInCriticalSection( $sectionId ); |
| 2185 | |
| 2186 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 2187 | |
| 2188 | if ( $runPostCommitCallbacks ) { |
| 2189 | $this->runTransactionPostCommitCallbacks(); |
| 2190 | } |
| 2191 | } |
| 2192 | |
| 2193 | final public function cancelAtomic( |
| 2194 | $fname = __METHOD__, |
| 2195 | AtomicSectionIdentifier $sectionId = null |
| 2196 | ) { |
| 2197 | $this->transactionManager->onCancelAtomicBeforeCriticalSection( $this, $fname ); |
| 2198 | $pos = $this->transactionManager->getPositionFromSectionId( $sectionId ); |
| 2199 | if ( $pos < 0 ) { |
| 2200 | throw new DBUnexpectedError( $this, "Atomic section not found (for $fname)" ); |
| 2201 | } |
| 2202 | |
| 2203 | $cs = $this->commenceCriticalSection( __METHOD__ ); |
| 2204 | $runPostRollbackCallbacks = false; |
| 2205 | [ $savedFname, $excisedSectionIds, $newTopSectionId, $savedSectionId, $savepointId ] = |
| 2206 | $this->transactionManager->cancelAtomic( $pos ); |
| 2207 | |
| 2208 | try { |
| 2209 | if ( $savedFname !== $fname ) { |
| 2210 | $e = new DBUnexpectedError( |
| 2211 | $this, |
| 2212 | "Invalid atomic section ended (got $fname but expected $savedFname)" |
| 2213 | ); |
| 2214 | $this->completeCriticalSection( __METHOD__, $cs, $e ); |
| 2215 | throw $e; |
| 2216 | } |
| 2217 | |
| 2218 | // Remove the last section (no need to re-index the array) |
| 2219 | $this->transactionManager->popAtomicLevel(); |
| 2220 | $excisedSectionIds[] = $savedSectionId; |
| 2221 | $newTopSectionId = $this->transactionManager->currentAtomicSectionId(); |
| 2222 | |
| 2223 | if ( $savepointId !== null ) { |
| 2224 | // Rollback the transaction changes proposed within this atomic section |
| 2225 | if ( $savepointId === self::NOT_APPLICABLE ) { |
| 2226 | // Atomic section started the transaction; rollback the whole transaction |
| 2227 | // and trigger cancellation callbacks for all active atomic sections |
| 2228 | $this->rollback( $fname, self::FLUSHING_INTERNAL ); |
| 2229 | $runPostRollbackCallbacks = true; |
| 2230 | } else { |
| 2231 | // Atomic section nested within the transaction; rollback the transaction |
| 2232 | // to the state prior to this section and trigger its cancellation callbacks |
| 2233 | $sql = $this->platform->rollbackToSavepointSqlText( $savepointId ); |
| 2234 | $query = new Query( $sql, self::QUERY_CHANGE_TRX, 'ROLLBACK TO SAVEPOINT' ); |
| 2235 | $this->query( $query, $fname ); |
| 2236 | $this->transactionManager->setTrxStatusToOk(); // no exception; recovered |
| 2237 | $this->transactionManager->runOnAtomicSectionCancelCallbacks( |
| 2238 | $this, |
| 2239 | self::TRIGGER_CANCEL, |
| 2240 | $excisedSectionIds |
| 2241 | ); |
| 2242 | } |
| 2243 | } else { |
| 2244 | // Put the transaction into an error state if it's not already in one |
| 2245 | $trxError = new DBUnexpectedError( |
| 2246 | $this, |
| 2247 | "Uncancelable atomic section canceled (got $fname)" |
| 2248 | ); |
| 2249 | $this->transactionManager->setTransactionError( $trxError ); |
| 2250 | } |
| 2251 | } finally { |
| 2252 | // Fix up callbacks owned by the sections that were just cancelled. |
| 2253 | // All callbacks should have an owner that is present in trxAtomicLevels. |
| 2254 | $this->transactionManager->modifyCallbacksForCancel( |
| 2255 | $excisedSectionIds, |
| 2256 | $newTopSectionId |
| 2257 | ); |
| 2258 | } |
| 2259 | |
| 2260 | $this->lastEmulatedAffectedRows = 0; // for the sake of consistency |
| 2261 | |
| 2262 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 2263 | |
| 2264 | if ( $runPostRollbackCallbacks ) { |
| 2265 | $this->runTransactionPostRollbackCallbacks(); |
| 2266 | } |
| 2267 | } |
| 2268 | |
| 2269 | final public function doAtomicSection( |
| 2270 | $fname, |
| 2271 | callable $callback, |
| 2272 | $cancelable = self::ATOMIC_NOT_CANCELABLE |
| 2273 | ) { |
| 2274 | $sectionId = $this->startAtomic( $fname, $cancelable ); |
| 2275 | try { |
| 2276 | $res = $callback( $this, $fname ); |
| 2277 | } catch ( Throwable $e ) { |
| 2278 | // Avoid confusing error reporting during critical section errors |
| 2279 | if ( !$this->csmError ) { |
| 2280 | $this->cancelAtomic( $fname, $sectionId ); |
| 2281 | } |
| 2282 | |
| 2283 | throw $e; |
| 2284 | } |
| 2285 | $this->endAtomic( $fname ); |
| 2286 | |
| 2287 | return $res; |
| 2288 | } |
| 2289 | |
| 2290 | final public function begin( $fname = __METHOD__, $mode = self::TRANSACTION_EXPLICIT ) { |
| 2291 | static $modes = [ self::TRANSACTION_EXPLICIT, self::TRANSACTION_INTERNAL ]; |
| 2292 | if ( !in_array( $mode, $modes, true ) ) { |
| 2293 | throw new DBUnexpectedError( $this, "$fname: invalid mode parameter '$mode'" ); |
| 2294 | } |
| 2295 | |
| 2296 | // Protect against mismatched atomic section, transaction nesting, and snapshot loss |
| 2297 | if ( $this->trxLevel() ) { |
| 2298 | $this->transactionManager->onBeginTransaction( $this, $fname ); |
| 2299 | } elseif ( $this->flagsHolder->hasImplicitTrxFlag() && $mode !== self::TRANSACTION_INTERNAL ) { |
| 2300 | $msg = "$fname: implicit transaction expected (DBO_TRX set)"; |
| 2301 | throw new DBUnexpectedError( $this, $msg ); |
| 2302 | } |
| 2303 | |
| 2304 | $this->assertHasConnectionHandle(); |
| 2305 | |
| 2306 | $cs = $this->commenceCriticalSection( __METHOD__ ); |
| 2307 | $timeStart = microtime( true ); |
| 2308 | try { |
| 2309 | $this->doBegin( $fname ); |
| 2310 | } catch ( DBError $e ) { |
| 2311 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 2312 | throw $e; |
| 2313 | } |
| 2314 | $timeEnd = microtime( true ); |
| 2315 | // Treat "BEGIN" as a trivial query to gauge the RTT delay |
| 2316 | $rtt = max( $timeEnd - $timeStart, 0.0 ); |
| 2317 | $this->transactionManager->newTrxId( $mode, $fname, $rtt ); |
| 2318 | $this->replicationReporter->resetReplicationLagStatus( $this ); |
| 2319 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 2320 | } |
| 2321 | |
| 2322 | /** |
| 2323 | * Issues the BEGIN command to the database server. |
| 2324 | * |
| 2325 | * @see Database::begin() |
| 2326 | * @param string $fname |
| 2327 | * @throws DBError |
| 2328 | */ |
| 2329 | protected function doBegin( $fname ) { |
| 2330 | $query = new Query( 'BEGIN', self::QUERY_CHANGE_TRX, 'BEGIN' ); |
| 2331 | $this->query( $query, $fname ); |
| 2332 | } |
| 2333 | |
| 2334 | final public function commit( $fname = __METHOD__, $flush = self::FLUSHING_ONE ) { |
| 2335 | static $modes = [ self::FLUSHING_ONE, self::FLUSHING_ALL_PEERS, self::FLUSHING_INTERNAL ]; |
| 2336 | if ( !in_array( $flush, $modes, true ) ) { |
| 2337 | throw new DBUnexpectedError( $this, "$fname: invalid flush parameter '$flush'" ); |
| 2338 | } |
| 2339 | |
| 2340 | if ( !$this->transactionManager->onCommit( $this, $fname, $flush ) ) { |
| 2341 | return; |
| 2342 | } |
| 2343 | |
| 2344 | $this->assertHasConnectionHandle(); |
| 2345 | |
| 2346 | $this->runOnTransactionPreCommitCallbacks(); |
| 2347 | |
| 2348 | $cs = $this->commenceCriticalSection( __METHOD__ ); |
| 2349 | try { |
| 2350 | if ( $this->trxLevel() ) { |
| 2351 | $query = new Query( 'COMMIT', self::QUERY_CHANGE_TRX, 'COMMIT' ); |
| 2352 | $this->query( $query, $fname ); |
| 2353 | } |
| 2354 | } catch ( DBError $e ) { |
| 2355 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 2356 | throw $e; |
| 2357 | } |
| 2358 | $lastWriteTime = $this->transactionManager->onCommitInCriticalSection( $this ); |
| 2359 | if ( $lastWriteTime ) { |
| 2360 | $this->lastWriteTime = $lastWriteTime; |
| 2361 | } |
| 2362 | // With FLUSHING_ALL_PEERS, callbacks will run when requested by a dedicated phase |
| 2363 | // within LoadBalancer. With FLUSHING_INTERNAL, callbacks will run when requested by |
| 2364 | // the Database caller during a safe point. This avoids isolation and recursion issues. |
| 2365 | if ( $flush === self::FLUSHING_ONE ) { |
| 2366 | $this->runTransactionPostCommitCallbacks(); |
| 2367 | } |
| 2368 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 2369 | } |
| 2370 | |
| 2371 | final public function rollback( $fname = __METHOD__, $flush = self::FLUSHING_ONE ) { |
| 2372 | if ( |
| 2373 | $flush !== self::FLUSHING_INTERNAL && |
| 2374 | $flush !== self::FLUSHING_ALL_PEERS && |
| 2375 | $this->flagsHolder->hasImplicitTrxFlag() |
| 2376 | ) { |
| 2377 | throw new DBUnexpectedError( |
| 2378 | $this, |
| 2379 | "$fname: Expected mass rollback of all peer transactions (DBO_TRX set)" |
| 2380 | ); |
| 2381 | } |
| 2382 | |
| 2383 | if ( !$this->trxLevel() ) { |
| 2384 | $this->transactionManager->setTrxStatusToNone(); |
| 2385 | $this->transactionManager->clearPreEndCallbacks(); |
| 2386 | if ( $this->transactionManager->trxLevel() <= TransactionManager::STATUS_TRX_ERROR ) { |
| 2387 | $this->logger->info( |
| 2388 | "$fname: acknowledged server-side transaction loss on {db_server}", |
| 2389 | $this->getLogContext() |
| 2390 | ); |
| 2391 | } |
| 2392 | |
| 2393 | return; |
| 2394 | } |
| 2395 | |
| 2396 | $this->assertHasConnectionHandle(); |
| 2397 | |
| 2398 | if ( $this->csmError ) { |
| 2399 | // Since the session state is corrupt, we cannot just rollback the transaction |
| 2400 | // while preserving the non-transaction session state. The handle will remain |
| 2401 | // marked as corrupt until flushSession() is called to reset the connection |
| 2402 | // and deal with any remaining callbacks. |
| 2403 | $this->logger->info( |
| 2404 | "$fname: acknowledged client-side transaction loss on {db_server}", |
| 2405 | $this->getLogContext() |
| 2406 | ); |
| 2407 | |
| 2408 | return; |
| 2409 | } |
| 2410 | |
| 2411 | $cs = $this->commenceCriticalSection( __METHOD__ ); |
| 2412 | if ( $this->trxLevel() ) { |
| 2413 | // Disconnects cause rollback anyway, so ignore those errors |
| 2414 | $query = new Query( |
| 2415 | $this->platform->rollbackSqlText(), |
| 2416 | self::QUERY_SILENCE_ERRORS | self::QUERY_CHANGE_TRX, |
| 2417 | 'ROLLBACK' |
| 2418 | ); |
| 2419 | $this->query( $query, $fname ); |
| 2420 | } |
| 2421 | $this->transactionManager->onRollback( $this ); |
| 2422 | // With FLUSHING_ALL_PEERS, callbacks will run when requested by a dedicated phase |
| 2423 | // within LoadBalancer. With FLUSHING_INTERNAL, callbacks will run when requested by |
| 2424 | // the Database caller during a safe point. This avoids isolation and recursion issues. |
| 2425 | if ( $flush === self::FLUSHING_ONE ) { |
| 2426 | $this->runTransactionPostRollbackCallbacks(); |
| 2427 | } |
| 2428 | $this->completeCriticalSection( __METHOD__, $cs ); |
| 2429 | } |
| 2430 | |
| 2431 | /** |
| 2432 | * @internal Only for tests and highly discouraged |
| 2433 | * @param TransactionManager $transactionManager |
| 2434 | */ |
| 2435 | public function setTransactionManager( TransactionManager $transactionManager ) { |
| 2436 | $this->transactionManager = $transactionManager; |
| 2437 | } |
| 2438 | |
| 2439 | public function flushSession( $fname = __METHOD__, $flush = self::FLUSHING_ONE ) { |
| 2440 | if ( |
| 2441 | $flush !== self::FLUSHING_INTERNAL && |
| 2442 | $flush !== self::FLUSHING_ALL_PEERS && |
| 2443 | $this->flagsHolder->hasImplicitTrxFlag() |
| 2444 | ) { |
| 2445 | throw new DBUnexpectedError( |
| 2446 | $this, |
| 2447 | "$fname: Expected mass flush of all peer connections (DBO_TRX set)" |
| 2448 | ); |
| 2449 | } |
| 2450 | |
| 2451 | if ( $this->csmError ) { |
| 2452 | // If a critical section error occurred, such as Excimer timeout exceptions raised |
| 2453 | // before a query response was marshalled, destroy the connection handle and reset |
| 2454 | // the session state tracking variables. The value of trxLevel() is irrelevant here, |
| 2455 | // and, in fact, might be 1 due to rollback() deferring critical section recovery. |
| 2456 | $this->logger->info( |
| 2457 | "$fname: acknowledged client-side session loss on {db_server}", |
| 2458 | $this->getLogContext() |
| 2459 | ); |
| 2460 | $this->csmError = null; |
| 2461 | $this->csmFname = null; |
| 2462 | $this->replaceLostConnection( 2048, __METHOD__ ); |
| 2463 | |
| 2464 | return; |
| 2465 | } |
| 2466 | |
| 2467 | if ( $this->trxLevel() ) { |
| 2468 | // Any existing transaction should have been rolled back already |
| 2469 | throw new DBUnexpectedError( |
| 2470 | $this, |
| 2471 | "$fname: transaction still in progress (not yet rolled back)" |
| 2472 | ); |
| 2473 | } |
| 2474 | |
| 2475 | if ( $this->transactionManager->sessionStatus() <= TransactionManager::STATUS_SESS_ERROR ) { |
| 2476 | // If the session state was already lost due to either an unacknowledged session |
| 2477 | // state loss error (e.g. dropped connection) or an explicit connection close call, |
| 2478 | // then there is nothing to do here. Note that in such cases, even temporary tables |
| 2479 | // and server-side config variables are lost (invocation of this method is assumed |
| 2480 | // to imply that such losses are tolerable). |
| 2481 | $this->logger->info( |
| 2482 | "$fname: acknowledged server-side session loss on {db_server}", |
| 2483 | $this->getLogContext() |
| 2484 | ); |
| 2485 | } elseif ( $this->isOpen() ) { |
| 2486 | // Connection handle exists; server-side session state must be flushed |
| 2487 | $this->doFlushSession( $fname ); |
| 2488 | $this->sessionNamedLocks = []; |
| 2489 | } |
| 2490 | |
| 2491 | $this->transactionManager->clearSessionError(); |
| 2492 | } |
| 2493 | |
| 2494 | /** |
| 2495 | * Reset the server-side session state for named locks and table locks |
| 2496 | * |
| 2497 | * Connection and query errors will be suppressed and logged |
| 2498 | * |
| 2499 | * @param string $fname |
| 2500 | * @since 1.38 |
| 2501 | */ |
| 2502 | protected function doFlushSession( $fname ) { |
| 2503 | // no-op |
| 2504 | } |
| 2505 | |
| 2506 | public function flushSnapshot( $fname = __METHOD__, $flush = self::FLUSHING_ONE ) { |
| 2507 | $this->transactionManager->onFlushSnapshot( $this, $fname, $flush, $this->getTransactionRoundId() ); |
| 2508 | $this->commit( $fname, self::FLUSHING_INTERNAL ); |
| 2509 | } |
| 2510 | |
| 2511 | public function duplicateTableStructure( |
| 2512 | $oldName, |
| 2513 | $newName, |
| 2514 | $temporary = false, |
| 2515 | $fname = __METHOD__ |
| 2516 | ) { |
| 2517 | throw new RuntimeException( __METHOD__ . ' is not implemented in descendant class' ); |
| 2518 | } |
| 2519 | |
| 2520 | public function listTables( $prefix = null, $fname = __METHOD__ ) { |
| 2521 | throw new RuntimeException( __METHOD__ . ' is not implemented in descendant class' ); |
| 2522 | } |
| 2523 | |
| 2524 | public function affectedRows() { |
| 2525 | $this->lastEmulatedAffectedRows ??= $this->lastQueryAffectedRows; |
| 2526 | |
| 2527 | return $this->lastEmulatedAffectedRows; |
| 2528 | } |
| 2529 | |
| 2530 | public function insertId() { |
| 2531 | if ( $this->lastEmulatedInsertId === null ) { |
| 2532 | // Guard against misuse of this method by checking affectedRows(). Note that calls |
| 2533 | // to insert() with "IGNORE" and calls to insertSelect() might not add any rows. |
| 2534 | if ( $this->affectedRows() ) { |
| 2535 | $this->lastEmulatedInsertId = $this->lastInsertId(); |
| 2536 | } else { |
| 2537 | $this->lastEmulatedInsertId = 0; |
| 2538 | } |
| 2539 | } |
| 2540 | |
| 2541 | return $this->lastEmulatedInsertId; |
| 2542 | } |
| 2543 | |
| 2544 | /** |
| 2545 | * Get a row ID from the last insert statement to implicitly assign one within the session |
| 2546 | * |
| 2547 | * If the statement involved assigning sequence IDs to multiple rows, then the return value |
| 2548 | * will be any one of those values (database-specific). If the statement was an "UPSERT" and |
| 2549 | * some existing rows were updated, then the result will either reflect only IDs of created |
| 2550 | * rows or it will reflect IDs of both created and updated rows (this is database-specific). |
| 2551 | * |
| 2552 | * The result is unspecified if the statement gave an error. |
| 2553 | * |
| 2554 | * @return int Sequence ID, 0 (if none) |
| 2555 | * @throws DBError |
| 2556 | */ |
| 2557 | abstract protected function lastInsertId(); |
| 2558 | |
| 2559 | public function ping() { |
| 2560 | if ( $this->isOpen() ) { |
| 2561 | // If the connection was recently used, assume that it is still good |
| 2562 | if ( ( microtime( true ) - $this->lastPing ) < self::PING_TTL ) { |
| 2563 | return true; |
| 2564 | } |
| 2565 | // Send a trivial query to test the connection, triggering an automatic |
| 2566 | // reconnection attempt if the connection was lost |
| 2567 | $query = new Query( |
| 2568 | self::PING_QUERY, |
| 2569 | self::QUERY_IGNORE_DBO_TRX | self::QUERY_SILENCE_ERRORS | self::QUERY_CHANGE_NONE, |
| 2570 | 'SELECT' |
| 2571 | ); |
| 2572 | $res = $this->query( $query, __METHOD__ ); |
| 2573 | $ok = ( $res !== false ); |
| 2574 | } else { |
| 2575 | // Try to re-establish a connection |
| 2576 | $ok = $this->replaceLostConnection( null, __METHOD__ ); |
| 2577 | } |
| 2578 | |
| 2579 | return $ok; |
| 2580 | } |
| 2581 | |
| 2582 | /** |
| 2583 | * Close any existing (dead) database connection and open a new connection |
| 2584 | * |
| 2585 | * @param int|null $lastErrno |
| 2586 | * @param string $fname |
| 2587 | * @return bool True if new connection is opened successfully, false if error |
| 2588 | */ |
| 2589 | protected function replaceLostConnection( $lastErrno, $fname ) { |
| 2590 | if ( $this->conn ) { |
| 2591 | $this->closeConnection(); |
| 2592 | $this->conn = null; |
| 2593 | $this->handleSessionLossPreconnect(); |
| 2594 | } |
| 2595 | |
| 2596 | try { |
| 2597 | $this->open( |
| 2598 | $this->connectionParams[self::CONN_HOST], |
| 2599 | $this->connectionParams[self::CONN_USER], |
| 2600 | $this->connectionParams[self::CONN_PASSWORD], |
| 2601 | $this->currentDomain->getDatabase(), |
| 2602 | $this->currentDomain->getSchema(), |
| 2603 | $this->tablePrefix() |
| 2604 | ); |
| 2605 | $this->lastPing = microtime( true ); |
| 2606 | $ok = true; |
| 2607 | |
| 2608 | $this->logger->warning( |
| 2609 | $fname . ': lost connection to {db_server} with error {errno}; reconnected', |
| 2610 | $this->getLogContext( [ |
| 2611 | 'exception' => new RuntimeException(), |
| 2612 | 'db_log_category' => 'connection', |
| 2613 | 'errno' => $lastErrno |
| 2614 | ] ) |
| 2615 | ); |
| 2616 | } catch ( DBConnectionError $e ) { |
| 2617 | $ok = false; |
| 2618 | |
| 2619 | $this->logger->error( |
| 2620 | $fname . ': lost connection to {db_server} with error {errno}; reconnection failed: {connect_msg}', |
| 2621 | $this->getLogContext( [ |
| 2622 | 'exception' => new RuntimeException(), |
| 2623 | 'db_log_category' => 'connection', |
| 2624 | 'errno' => $lastErrno, |
| 2625 | 'connect_msg' => $e->getMessage() |
| 2626 | ] ) |
| 2627 | ); |
| 2628 | } |
| 2629 | |
| 2630 | // Handle callbacks in trxEndCallbacks, e.g. onTransactionResolution(). |
| 2631 | // If callback suppression is set then the array will remain unhandled. |
| 2632 | $this->runOnTransactionIdleCallbacks( self::TRIGGER_ROLLBACK ); |
| 2633 | // Handle callbacks in trxRecurringCallbacks, e.g. setTransactionListener(). |
| 2634 | // If callback suppression is set then the array will remain unhandled. |
| 2635 | $this->runTransactionListenerCallbacks( self::TRIGGER_ROLLBACK ); |
| 2636 | |
| 2637 | return $ok; |
| 2638 | } |
| 2639 | |
| 2640 | /** |
| 2641 | * Merge the result of getSessionLagStatus() for several DBs |
| 2642 | * using the most pessimistic values to estimate the lag of |
| 2643 | * any data derived from them in combination |
| 2644 | * |
| 2645 | * This is information is useful for caching modules |
| 2646 | * |
| 2647 | * @see WANObjectCache::set() |
| 2648 | * @see WANObjectCache::getWithSetCallback() |
| 2649 | * |
| 2650 | * @param IReadableDatabase|null ...$dbs |
| 2651 | * Note: For backward compatibility, it is allowed for null values |
| 2652 | * to be passed among the parameters. This is deprecated since 1.36, |
| 2653 | * only IReadableDatabase objects should be passed. |
| 2654 | * |
| 2655 | * @return array Map of values: |
| 2656 | * - lag: highest lag of any of the DBs or false on error (e.g. replication stopped) |
| 2657 | * - since: oldest UNIX timestamp of any of the DB lag estimates |
| 2658 | * - pending: whether any of the DBs have uncommitted changes |
| 2659 | * @throws DBError |
| 2660 | * @since 1.27 |
| 2661 | */ |
| 2662 | public static function getCacheSetOptions( ?IReadableDatabase ...$dbs ) { |
| 2663 | $res = [ 'lag' => 0, 'since' => INF, 'pending' => false ]; |
| 2664 | |
| 2665 | foreach ( func_get_args() as $db ) { |
| 2666 | if ( $db instanceof IReadableDatabase ) { |
| 2667 | $status = $db->getSessionLagStatus(); |
| 2668 | |
| 2669 | if ( $status['lag'] === false ) { |
| 2670 | $res['lag'] = false; |
| 2671 | } elseif ( $res['lag'] !== false ) { |
| 2672 | $res['lag'] = max( $res['lag'], $status['lag'] ); |
| 2673 | } |
| 2674 | $res['since'] = min( $res['since'], $status['since'] ); |
| 2675 | } |
| 2676 | |
| 2677 | if ( $db instanceof IDatabaseForOwner ) { |
| 2678 | $res['pending'] = $res['pending'] ?: $db->writesPending(); |
| 2679 | } |
| 2680 | } |
| 2681 | |
| 2682 | return $res; |
| 2683 | } |
| 2684 | |
| 2685 | public function encodeBlob( $b ) { |
| 2686 | return $b; |
| 2687 | } |
| 2688 | |
| 2689 | public function decodeBlob( $b ) { |
| 2690 | if ( $b instanceof Blob ) { |
| 2691 | $b = $b->fetch(); |
| 2692 | } |
| 2693 | return $b; |
| 2694 | } |
| 2695 | |
| 2696 | public function setSessionOptions( array $options ) { |
| 2697 | } |
| 2698 | |
| 2699 | public function sourceFile( |
| 2700 | $filename, |
| 2701 | callable $lineCallback = null, |
| 2702 | callable $resultCallback = null, |
| 2703 | $fname = false, |
| 2704 | callable $inputCallback = null |
| 2705 | ) { |
| 2706 | AtEase::suppressWarnings(); |
| 2707 | $fp = fopen( $filename, 'r' ); |
| 2708 | AtEase::restoreWarnings(); |
| 2709 | |
| 2710 | if ( $fp === false ) { |
| 2711 | throw new RuntimeException( "Could not open \"{$filename}\"" ); |
| 2712 | } |
| 2713 | |
| 2714 | if ( !$fname ) { |
| 2715 | $fname = __METHOD__ . "( $filename )"; |
| 2716 | } |
| 2717 | |
| 2718 | try { |
| 2719 | return $this->sourceStream( |
| 2720 | $fp, |
| 2721 | $lineCallback, |
| 2722 | $resultCallback, |
| 2723 | $fname, |
| 2724 | $inputCallback |
| 2725 | ); |
| 2726 | } finally { |
| 2727 | fclose( $fp ); |
| 2728 | } |
| 2729 | } |
| 2730 | |
| 2731 | public function sourceStream( |
| 2732 | $fp, |
| 2733 | callable $lineCallback = null, |
| 2734 | callable $resultCallback = null, |
| 2735 | $fname = __METHOD__, |
| 2736 | callable $inputCallback = null |
| 2737 | ) { |
| 2738 | $delimiterReset = new ScopedCallback( |
| 2739 | function ( $delimiter ) { |
| 2740 | $this->delimiter = $delimiter; |
| 2741 | }, |
| 2742 | [ $this->delimiter ] |
| 2743 | ); |
| 2744 | $cmd = ''; |
| 2745 | |
| 2746 | while ( !feof( $fp ) ) { |
| 2747 | if ( $lineCallback ) { |
| 2748 | call_user_func( $lineCallback ); |
| 2749 | } |
| 2750 | |
| 2751 | $line = trim( fgets( $fp ) ); |
| 2752 | |
| 2753 | if ( $line == '' ) { |
| 2754 | continue; |
| 2755 | } |
| 2756 | |
| 2757 | if ( $line[0] == '-' && $line[1] == '-' ) { |
| 2758 | continue; |
| 2759 | } |
| 2760 | |
| 2761 | if ( $cmd != '' ) { |
| 2762 | $cmd .= ' '; |
| 2763 | } |
| 2764 | |
| 2765 | $done = $this->streamStatementEnd( $cmd, $line ); |
| 2766 | |
| 2767 | $cmd .= "$line\n"; |
| 2768 | |
| 2769 | if ( $done || feof( $fp ) ) { |
| 2770 | $cmd = $this->platform->replaceVars( $cmd ); |
| 2771 | |
| 2772 | if ( $inputCallback ) { |
| 2773 | $callbackResult = $inputCallback( $cmd ); |
| 2774 | |
| 2775 | if ( is_string( $callbackResult ) || !$callbackResult ) { |
| 2776 | $cmd = $callbackResult; |
| 2777 | } |
| 2778 | } |
| 2779 | |
| 2780 | if ( $cmd ) { |
| 2781 | $res = $this->query( $cmd, $fname ); |
| 2782 | |
| 2783 | if ( $resultCallback ) { |
| 2784 | $resultCallback( $res, $this ); |
| 2785 | } |
| 2786 | |
| 2787 | if ( $res === false ) { |
| 2788 | $err = $this->lastError(); |
| 2789 | |
| 2790 | return "Query \"{$cmd}\" failed with error code \"$err\".\n"; |
| 2791 | } |
| 2792 | } |
| 2793 | $cmd = ''; |
| 2794 | } |
| 2795 | } |
| 2796 | |
| 2797 | ScopedCallback::consume( $delimiterReset ); |
| 2798 | return true; |
| 2799 | } |
| 2800 | |
| 2801 | /** |
| 2802 | * Called by sourceStream() to check if we've reached a statement end |
| 2803 | * |
| 2804 | * @param string &$sql SQL assembled so far |
| 2805 | * @param string &$newLine New line about to be added to $sql |
| 2806 | * @return bool Whether $newLine contains end of the statement |
| 2807 | */ |
| 2808 | public function streamStatementEnd( &$sql, &$newLine ) { |
| 2809 | if ( $this->delimiter ) { |
| 2810 | $prev = $newLine; |
| 2811 | $newLine = preg_replace( |
| 2812 | '/' . preg_quote( $this->delimiter, '/' ) . '$/', |
| 2813 | '', |
| 2814 | $newLine |
| 2815 | ); |
| 2816 | if ( $newLine != $prev ) { |
| 2817 | return true; |
| 2818 | } |
| 2819 | } |
| 2820 | |
| 2821 | return false; |
| 2822 | } |
| 2823 | |
| 2824 | /** |
| 2825 | * @inheritDoc |
| 2826 | */ |
| 2827 | public function lockIsFree( $lockName, $method ) { |
| 2828 | // RDBMs methods for checking named locks may or may not count this thread itself. |
| 2829 | // In MySQL, IS_FREE_LOCK() returns 0 if the thread already has the lock. This is |
| 2830 | // the behavior chosen by the interface for this method. |
| 2831 | if ( isset( $this->sessionNamedLocks[$lockName] ) ) { |
| 2832 | $lockIsFree = false; |
| 2833 | } else { |
| 2834 | $lockIsFree = $this->doLockIsFree( $lockName, $method ); |
| 2835 | } |
| 2836 | |
| 2837 | return $lockIsFree; |
| 2838 | } |
| 2839 | |
| 2840 | /** |
| 2841 | * @see lockIsFree() |
| 2842 | * |
| 2843 | * @param string $lockName |
| 2844 | * @param string $method |
| 2845 | * @return bool Success |
| 2846 | * @throws DBError |
| 2847 | */ |
| 2848 | protected function doLockIsFree( string $lockName, string $method ) { |
| 2849 | return true; // not implemented |
| 2850 | } |
| 2851 | |
| 2852 | /** |
| 2853 | * @inheritDoc |
| 2854 | */ |
| 2855 | public function lock( $lockName, $method, $timeout = 5, $flags = 0 ) { |
| 2856 | $lockTsUnix = $this->doLock( $lockName, $method, $timeout ); |
| 2857 | if ( $lockTsUnix !== null ) { |
| 2858 | $locked = true; |
| 2859 | $this->sessionNamedLocks[$lockName] = [ |
| 2860 | 'ts' => $lockTsUnix, |
| 2861 | 'trxId' => $this->transactionManager->getTrxId() |
| 2862 | ]; |
| 2863 | } else { |
| 2864 | $locked = false; |
| 2865 | $this->logger->info( |
| 2866 | __METHOD__ . ": failed to acquire lock '{lockname}'", |
| 2867 | [ |
| 2868 | 'lockname' => $lockName, |
| 2869 | 'db_log_category' => 'locking' |
| 2870 | ] |
| 2871 | ); |
| 2872 | } |
| 2873 | |
| 2874 | return $this->flagsHolder::contains( $flags, self::LOCK_TIMESTAMP ) ? $lockTsUnix : $locked; |
| 2875 | } |
| 2876 | |
| 2877 | /** |
| 2878 | * @see lock() |
| 2879 | * |
| 2880 | * @param string $lockName |
| 2881 | * @param string $method |
| 2882 | * @param int $timeout |
| 2883 | * @return float|null UNIX timestamp of lock acquisition; null on failure |
| 2884 | * @throws DBError |
| 2885 | */ |
| 2886 | protected function doLock( string $lockName, string $method, int $timeout ) { |
| 2887 | return microtime( true ); // not implemented |
| 2888 | } |
| 2889 | |
| 2890 | /** |
| 2891 | * @inheritDoc |
| 2892 | */ |
| 2893 | public function unlock( $lockName, $method ) { |
| 2894 | if ( !isset( $this->sessionNamedLocks[$lockName] ) ) { |
| 2895 | $released = false; |
| 2896 | $this->logger->warning( |
| 2897 | __METHOD__ . ": trying to release unheld lock '$lockName'\n", |
| 2898 | [ 'db_log_category' => 'locking' ] |
| 2899 | ); |
| 2900 | } else { |
| 2901 | $released = $this->doUnlock( $lockName, $method ); |
| 2902 | if ( $released ) { |
| 2903 | unset( $this->sessionNamedLocks[$lockName] ); |
| 2904 | } else { |
| 2905 | $this->logger->warning( |
| 2906 | __METHOD__ . ": failed to release lock '$lockName'\n", |
| 2907 | [ 'db_log_category' => 'locking' ] |
| 2908 | ); |
| 2909 | } |
| 2910 | } |
| 2911 | |
| 2912 | return $released; |
| 2913 | } |
| 2914 | |
| 2915 | /** |
| 2916 | * @see unlock() |
| 2917 | * |
| 2918 | * @param string $lockName |
| 2919 | * @param string $method |
| 2920 | * @return bool Success |
| 2921 | * @throws DBError |
| 2922 | */ |
| 2923 | protected function doUnlock( string $lockName, string $method ) { |
| 2924 | return true; // not implemented |
| 2925 | } |
| 2926 | |
| 2927 | public function getScopedLockAndFlush( $lockKey, $fname, $timeout ) { |
| 2928 | $this->transactionManager->onGetScopedLockAndFlush( $this, $fname ); |
| 2929 | |
| 2930 | if ( !$this->lock( $lockKey, $fname, $timeout ) ) { |
| 2931 | return null; |
| 2932 | } |
| 2933 | |
| 2934 | $unlocker = new ScopedCallback( function () use ( $lockKey, $fname ) { |
| 2935 | // Note that the callback can be reached due to an exception making the calling |
| 2936 | // function end early. If the transaction/session is in an error state, avoid log |
| 2937 | // spam and confusing replacement of an original DBError with one about unlock(). |
| 2938 | // Unlock query will fail anyway; avoid possibly triggering errors in rollback() |
| 2939 | if ( |
| 2940 | $this->transactionManager->sessionStatus() <= TransactionManager::STATUS_SESS_ERROR || |
| 2941 | $this->transactionManager->trxStatus() <= TransactionManager::STATUS_TRX_ERROR |
| 2942 | ) { |
| 2943 | return; |
| 2944 | } |
| 2945 | if ( $this->trxLevel() ) { |
| 2946 | $this->onTransactionResolution( |
| 2947 | function () use ( $lockKey, $fname ) { |
| 2948 | $this->unlock( $lockKey, $fname ); |
| 2949 | }, |
| 2950 | $fname |
| 2951 | ); |
| 2952 | } else { |
| 2953 | $this->unlock( $lockKey, $fname ); |
| 2954 | } |
| 2955 | } ); |
| 2956 | |
| 2957 | $this->commit( $fname, self::FLUSHING_INTERNAL ); |
| 2958 | |
| 2959 | return $unlocker; |
| 2960 | } |
| 2961 | |
| 2962 | public function dropTable( $table, $fname = __METHOD__ ) { |
| 2963 | if ( !$this->tableExists( $table, $fname ) ) { |
| 2964 | return false; |
| 2965 | } |
| 2966 | |
| 2967 | $query = new Query( |
| 2968 | $this->platform->dropTableSqlText( $table ), |
| 2969 | self::QUERY_CHANGE_SCHEMA, |
| 2970 | 'DROP', |
| 2971 | $table |
| 2972 | ); |
| 2973 | $this->query( $query, $fname ); |
| 2974 | |
| 2975 | return true; |
| 2976 | } |
| 2977 | |
| 2978 | public function truncateTable( $table, $fname = __METHOD__ ) { |
| 2979 | $sql = "TRUNCATE TABLE " . $this->tableName( $table ); |
| 2980 | $query = new Query( $sql, self::QUERY_CHANGE_SCHEMA, 'TRUNCATE', $table ); |
| 2981 | $this->query( $query, $fname ); |
| 2982 | } |
| 2983 | |
| 2984 | public function isReadOnly() { |
| 2985 | return ( $this->getReadOnlyReason() !== null ); |
| 2986 | } |
| 2987 | |
| 2988 | /** |
| 2989 | * @return array|null Tuple of (reason string, "role" or "lb") if read-only; null otherwise |
| 2990 | */ |
| 2991 | protected function getReadOnlyReason() { |
| 2992 | $reason = $this->replicationReporter->getTopologyBasedReadOnlyReason(); |
| 2993 | if ( $reason ) { |
| 2994 | return $reason; |
| 2995 | } |
| 2996 | |
| 2997 | $reason = $this->getLBInfo( self::LB_READ_ONLY_REASON ); |
| 2998 | if ( is_string( $reason ) ) { |
| 2999 | return [ $reason, 'lb' ]; |
| 3000 | } |
| 3001 | |
| 3002 | return null; |
| 3003 | } |
| 3004 | |
| 3005 | /** |
| 3006 | * Get the underlying binding connection handle |
| 3007 | * |
| 3008 | * Makes sure the connection resource is set (disconnects and ping() failure can unset it). |
| 3009 | * This catches broken callers than catch and ignore disconnection exceptions. |
| 3010 | * Unlike checking isOpen(), this is safe to call inside of open(). |
| 3011 | * |
| 3012 | * @return mixed |
| 3013 | * @throws DBUnexpectedError |
| 3014 | * @since 1.26 |
| 3015 | */ |
| 3016 | protected function getBindingHandle() { |
| 3017 | if ( !$this->conn ) { |
| 3018 | throw new DBUnexpectedError( |
| 3019 | $this, |
| 3020 | 'DB connection was already closed or the connection dropped' |
| 3021 | ); |
| 3022 | } |
| 3023 | |
| 3024 | return $this->conn; |
| 3025 | } |
| 3026 | |
| 3027 | /** |
| 3028 | * Demark the start of a critical section of session/transaction state changes |
| 3029 | * |
| 3030 | * Use this to disable potentially DB handles due to corruption from highly unexpected |
| 3031 | * exceptions (e.g. from zend timers or coding errors) preempting execution of methods. |
| 3032 | * |
| 3033 | * Callers must demark completion of the critical section with completeCriticalSection(). |
| 3034 | * Callers should handle DBError exceptions that do not cause object state corruption by |
| 3035 | * catching them, calling completeCriticalSection(), and then rethrowing them. |
| 3036 | * |
| 3037 | * @code |
| 3038 | * $cs = $this->commenceCriticalSection( __METHOD__ ); |
| 3039 | * try { |
| 3040 | * //...send a query that changes the session/transaction state... |
| 3041 | * } catch ( DBError $e ) { |
| 3042 | * $this->completeCriticalSection( __METHOD__, $cs ); |
| 3043 | * throw $expectedException; |
| 3044 | * } |
| 3045 | * try { |
| 3046 | * //...send another query that changes the session/transaction state... |
| 3047 | * } catch ( DBError $trxError ) { |
| 3048 | * // Require ROLLBACK before allowing any other queries from outside callers |
| 3049 | * $this->completeCriticalSection( __METHOD__, $cs, $trxError ); |
| 3050 | * throw $expectedException; |
| 3051 | * } |
| 3052 | * // ...update session state fields of $this... |
| 3053 | * $this->completeCriticalSection( __METHOD__, $cs ); |
| 3054 | * @endcode |
| 3055 | * |
| 3056 | * @see Database::completeCriticalSection() |
| 3057 | * |
| 3058 | * @since 1.36 |
| 3059 | * @param string $fname Caller name |
| 3060 | * @return CriticalSectionScope|null RAII-style monitor (topmost sections only) |
| 3061 | * @throws DBUnexpectedError If an unresolved critical section error already exists |
| 3062 | */ |
| 3063 | protected function commenceCriticalSection( string $fname ) { |
| 3064 | if ( $this->csmError ) { |
| 3065 | throw new DBUnexpectedError( |
| 3066 | $this, |
| 3067 | "Cannot execute $fname critical section while session state is out of sync.\n\n" . |
| 3068 | $this->csmError->getMessage() . "\n" . |
| 3069 | $this->csmError->getTraceAsString() |
| 3070 | ); |
| 3071 | } |
| 3072 | |
| 3073 | if ( $this->csmId ) { |
| 3074 | $csm = null; // fold into the outer critical section |
| 3075 | } elseif ( $this->csProvider ) { |
| 3076 | $csm = $this->csProvider->scopedEnter( |
| 3077 | $fname, |
| 3078 | null, // emergency limit (default) |
| 3079 | null, // emergency callback (default) |
| 3080 | function () use ( $fname ) { |
| 3081 | // Mark a critical section as having been aborted by an error |
| 3082 | $e = new RuntimeException( "A critical section from {$fname} has failed" ); |
| 3083 | $this->csmError = $e; |
| 3084 | $this->csmId = null; |
| 3085 | } |
| 3086 | ); |
| 3087 | $this->csmId = $csm->getId(); |
| 3088 | $this->csmFname = $fname; |
| 3089 | } else { |
| 3090 | $csm = null; // not supported |
| 3091 | } |
| 3092 | |
| 3093 | return $csm; |
| 3094 | } |
| 3095 | |
| 3096 | /** |
| 3097 | * Demark the completion of a critical section of session/transaction state changes |
| 3098 | * |
| 3099 | * @see Database::commenceCriticalSection() |
| 3100 | * |
| 3101 | * @since 1.36 |
| 3102 | * @param string $fname Caller name |
| 3103 | * @param CriticalSectionScope|null $csm RAII-style monitor (topmost sections only) |
| 3104 | * @param Throwable|null $trxError Error that requires setting STATUS_TRX_ERROR (if any) |
| 3105 | */ |
| 3106 | protected function completeCriticalSection( |
| 3107 | string $fname, |
| 3108 | ?CriticalSectionScope $csm, |
| 3109 | Throwable $trxError = null |
| 3110 | ) { |
| 3111 | if ( $csm !== null ) { |
| 3112 | if ( $this->csmId === null ) { |
| 3113 | throw new LogicException( "$fname critical section is not active" ); |
| 3114 | } elseif ( $csm->getId() !== $this->csmId ) { |
| 3115 | throw new LogicException( |
| 3116 | "$fname critical section is not the active ({$this->csmFname}) one" |
| 3117 | ); |
| 3118 | } |
| 3119 | |
| 3120 | $csm->exit(); |
| 3121 | $this->csmId = null; |
| 3122 | } |
| 3123 | |
| 3124 | if ( $trxError ) { |
| 3125 | $this->transactionManager->setTransactionError( $trxError ); |
| 3126 | } |
| 3127 | } |
| 3128 | |
| 3129 | public function __toString() { |
| 3130 | $id = spl_object_id( $this ); |
| 3131 | |
| 3132 | $description = $this->getType() . ' object #' . $id; |
| 3133 | // phpcs:ignore MediaWiki.Usage.ForbiddenFunctions.is_resource |
| 3134 | if ( is_resource( $this->conn ) ) { |
| 3135 | $description .= ' (' . (string)$this->conn . ')'; // "resource id #<ID>" |
| 3136 | } elseif ( is_object( $this->conn ) ) { |
| 3137 | $handleId = spl_object_id( $this->conn ); |
| 3138 | $description .= " (handle id #$handleId)"; |
| 3139 | } |
| 3140 | |
| 3141 | return $description; |
| 3142 | } |
| 3143 | |
| 3144 | /** |
| 3145 | * Make sure that copies do not share the same client binding handle |
| 3146 | * @throws DBConnectionError |
| 3147 | */ |
| 3148 | public function __clone() { |
| 3149 | $this->logger->warning( |
| 3150 | "Cloning " . static::class . " is not recommended; forking connection", |
| 3151 | [ |
| 3152 | 'exception' => new RuntimeException(), |
| 3153 | 'db_log_category' => 'connection' |
| 3154 | ] |
| 3155 | ); |
| 3156 | |
| 3157 | if ( $this->isOpen() ) { |
| 3158 | // Open a new connection resource without messing with the old one |
| 3159 | $this->conn = null; |
| 3160 | $this->transactionManager->clearEndCallbacks(); |
| 3161 | $this->handleSessionLossPreconnect(); // no trx or locks anymore |
| 3162 | $this->open( |
| 3163 | $this->connectionParams[self::CONN_HOST], |
| 3164 | $this->connectionParams[self::CONN_USER], |
| 3165 | $this->connectionParams[self::CONN_PASSWORD], |
| 3166 | $this->currentDomain->getDatabase(), |
| 3167 | $this->currentDomain->getSchema(), |
| 3168 | $this->tablePrefix() |
| 3169 | ); |
| 3170 | $this->lastPing = microtime( true ); |
| 3171 | } |
| 3172 | } |
| 3173 | |
| 3174 | /** |
| 3175 | * Called by serialize. Throw an exception when DB connection is serialized. |
| 3176 | * This causes problems on some database engines because the connection is |
| 3177 | * not restored on unserialize. |
| 3178 | * @return never |
| 3179 | */ |
| 3180 | public function __sleep() { |
| 3181 | throw new RuntimeException( 'Database serialization may cause problems, since ' . |
| 3182 | 'the connection is not restored on wakeup' ); |
| 3183 | } |
| 3184 | |
| 3185 | /** |
| 3186 | * Run a few simple checks and close dangling connections |
| 3187 | */ |
| 3188 | public function __destruct() { |
| 3189 | if ( $this->transactionManager ) { |
| 3190 | // Tests mock this class and disable constructor. |
| 3191 | $this->transactionManager->onDestruct(); |
| 3192 | } |
| 3193 | |
| 3194 | $danglingWriters = $this->pendingWriteAndCallbackCallers(); |
| 3195 | if ( $danglingWriters ) { |
| 3196 | $fnames = implode( ', ', $danglingWriters ); |
| 3197 | trigger_error( "DB transaction writes or callbacks still pending ($fnames)" ); |
| 3198 | } |
| 3199 | |
| 3200 | if ( $this->conn ) { |
| 3201 | // Avoid connection leaks. Normally, resources close at script completion. |
| 3202 | // The connection might already be closed in PHP by now, so suppress warnings. |
| 3203 | AtEase::suppressWarnings(); |
| 3204 | $this->closeConnection(); |
| 3205 | AtEase::restoreWarnings(); |
| 3206 | $this->conn = null; |
| 3207 | } |
| 3208 | } |
| 3209 | |
| 3210 | /* Start of methods delegated to DatabaseFlags. Avoid using them outside of rdbms library */ |
| 3211 | |
| 3212 | public function setFlag( $flag, $remember = self::REMEMBER_NOTHING ) { |
| 3213 | $this->flagsHolder->setFlag( $flag, $remember ); |
| 3214 | } |
| 3215 | |
| 3216 | public function clearFlag( $flag, $remember = self::REMEMBER_NOTHING ) { |
| 3217 | $this->flagsHolder->clearFlag( $flag, $remember ); |
| 3218 | } |
| 3219 | |
| 3220 | public function restoreFlags( $state = self::RESTORE_PRIOR ) { |
| 3221 | $this->flagsHolder->restoreFlags( $state ); |
| 3222 | } |
| 3223 | |
| 3224 | public function getFlag( $flag ) { |
| 3225 | return $this->flagsHolder->getFlag( $flag ); |
| 3226 | } |
| 3227 | |
| 3228 | /* End of methods delegated to DatabaseFlags. */ |
| 3229 | |
| 3230 | /* Start of methods delegated to TransactionManager. Avoid using them outside of rdbms library */ |
| 3231 | |
| 3232 | final public function trxLevel() { |
| 3233 | // FIXME: A lot of tests disable constructor leading to trx manager being |
| 3234 | // null and breaking, this is unacceptable but hopefully this should |
| 3235 | // happen less by moving these functions to the transaction manager class. |
| 3236 | if ( !$this->transactionManager ) { |
| 3237 | $this->transactionManager = new TransactionManager( new NullLogger() ); |
| 3238 | } |
| 3239 | return $this->transactionManager->trxLevel(); |
| 3240 | } |
| 3241 | |
| 3242 | public function trxTimestamp() { |
| 3243 | return $this->transactionManager->trxTimestamp(); |
| 3244 | } |
| 3245 | |
| 3246 | public function trxStatus() { |
| 3247 | return $this->transactionManager->trxStatus(); |
| 3248 | } |
| 3249 | |
| 3250 | public function writesPending() { |
| 3251 | return $this->transactionManager->writesPending(); |
| 3252 | } |
| 3253 | |
| 3254 | public function writesOrCallbacksPending() { |
| 3255 | return $this->transactionManager->writesOrCallbacksPending(); |
| 3256 | } |
| 3257 | |
| 3258 | public function pendingWriteQueryDuration( $type = self::ESTIMATE_TOTAL ) { |
| 3259 | return $this->transactionManager->pendingWriteQueryDuration( $type ); |
| 3260 | } |
| 3261 | |
| 3262 | public function pendingWriteCallers() { |
| 3263 | if ( !$this->transactionManager ) { |
| 3264 | return []; |
| 3265 | } |
| 3266 | return $this->transactionManager->pendingWriteCallers(); |
| 3267 | } |
| 3268 | |
| 3269 | public function pendingWriteAndCallbackCallers() { |
| 3270 | if ( !$this->transactionManager ) { |
| 3271 | return []; |
| 3272 | } |
| 3273 | return $this->transactionManager->pendingWriteAndCallbackCallers(); |
| 3274 | } |
| 3275 | |
| 3276 | public function runOnTransactionPreCommitCallbacks() { |
| 3277 | return $this->transactionManager->runOnTransactionPreCommitCallbacks( $this ); |
| 3278 | } |
| 3279 | |
| 3280 | public function explicitTrxActive() { |
| 3281 | return $this->transactionManager->explicitTrxActive(); |
| 3282 | } |
| 3283 | |
| 3284 | /* End of methods delegated to TransactionManager. */ |
| 3285 | |
| 3286 | /* Start of methods delegated to SQLPlatform. Avoid using them outside of rdbms library */ |
| 3287 | |
| 3288 | public function implicitOrderby() { |
| 3289 | return $this->platform->implicitOrderby(); |
| 3290 | } |
| 3291 | |
| 3292 | public function selectSQLText( |
| 3293 | $tables, $vars, $conds = '', $fname = __METHOD__, $options = [], $join_conds = [] |
| 3294 | ) { |
| 3295 | return $this->platform->selectSQLText( $tables, $vars, $conds, $fname, $options, $join_conds ); |
| 3296 | } |
| 3297 | |
| 3298 | public function buildComparison( string $op, array $conds ): string { |
| 3299 | return $this->platform->buildComparison( $op, $conds ); |
| 3300 | } |
| 3301 | |
| 3302 | public function makeList( array $a, $mode = self::LIST_COMMA ) { |
| 3303 | return $this->platform->makeList( $a, $mode ); |
| 3304 | } |
| 3305 | |
| 3306 | public function makeWhereFrom2d( $data, $baseKey, $subKey ) { |
| 3307 | return $this->platform->makeWhereFrom2d( $data, $baseKey, $subKey ); |
| 3308 | } |
| 3309 | |
| 3310 | public function factorConds( $condsArray ) { |
| 3311 | return $this->platform->factorConds( $condsArray ); |
| 3312 | } |
| 3313 | |
| 3314 | public function bitNot( $field ) { |
| 3315 | return $this->platform->bitNot( $field ); |
| 3316 | } |
| 3317 | |
| 3318 | public function bitAnd( $fieldLeft, $fieldRight ) { |
| 3319 | return $this->platform->bitAnd( $fieldLeft, $fieldRight ); |
| 3320 | } |
| 3321 | |
| 3322 | public function bitOr( $fieldLeft, $fieldRight ) { |
| 3323 | return $this->platform->bitOr( $fieldLeft, $fieldRight ); |
| 3324 | } |
| 3325 | |
| 3326 | public function buildConcat( $stringList ) { |
| 3327 | return $this->platform->buildConcat( $stringList ); |
| 3328 | } |
| 3329 | |
| 3330 | public function buildGreatest( $fields, $values ) { |
| 3331 | return $this->platform->buildGreatest( $fields, $values ); |
| 3332 | } |
| 3333 | |
| 3334 | public function buildLeast( $fields, $values ) { |
| 3335 | return $this->platform->buildLeast( $fields, $values ); |
| 3336 | } |
| 3337 | |
| 3338 | public function buildSubstring( $input, $startPosition, $length = null ) { |
| 3339 | return $this->platform->buildSubstring( $input, $startPosition, $length ); |
| 3340 | } |
| 3341 | |
| 3342 | public function buildStringCast( $field ) { |
| 3343 | return $this->platform->buildStringCast( $field ); |
| 3344 | } |
| 3345 | |
| 3346 | public function buildIntegerCast( $field ) { |
| 3347 | return $this->platform->buildIntegerCast( $field ); |
| 3348 | } |
| 3349 | |
| 3350 | public function tableName( string $name, $format = 'quoted' ) { |
| 3351 | return $this->platform->tableName( $name, $format ); |
| 3352 | } |
| 3353 | |
| 3354 | public function tableNames( ...$tables ) { |
| 3355 | return $this->platform->tableNames( ...$tables ); |
| 3356 | } |
| 3357 | |
| 3358 | public function tableNamesN( ...$tables ) { |
| 3359 | return $this->platform->tableNamesN( ...$tables ); |
| 3360 | } |
| 3361 | |
| 3362 | public function addIdentifierQuotes( $s ) { |
| 3363 | return $this->platform->addIdentifierQuotes( $s ); |
| 3364 | } |
| 3365 | |
| 3366 | public function isQuotedIdentifier( $name ) { |
| 3367 | return $this->platform->isQuotedIdentifier( $name ); |
| 3368 | } |
| 3369 | |
| 3370 | public function buildLike( $param, ...$params ) { |
| 3371 | return $this->platform->buildLike( $param, ...$params ); |
| 3372 | } |
| 3373 | |
| 3374 | public function anyChar() { |
| 3375 | return $this->platform->anyChar(); |
| 3376 | } |
| 3377 | |
| 3378 | public function anyString() { |
| 3379 | return $this->platform->anyString(); |
| 3380 | } |
| 3381 | |
| 3382 | public function limitResult( $sql, $limit, $offset = false ) { |
| 3383 | return $this->platform->limitResult( $sql, $limit, $offset ); |
| 3384 | } |
| 3385 | |
| 3386 | public function unionSupportsOrderAndLimit() { |
| 3387 | return $this->platform->unionSupportsOrderAndLimit(); |
| 3388 | } |
| 3389 | |
| 3390 | public function unionQueries( $sqls, $all, $options = [] ) { |
| 3391 | return $this->platform->unionQueries( $sqls, $all, $options ); |
| 3392 | } |
| 3393 | |
| 3394 | public function conditional( $cond, $caseTrueExpression, $caseFalseExpression ) { |
| 3395 | return $this->platform->conditional( $cond, $caseTrueExpression, $caseFalseExpression ); |
| 3396 | } |
| 3397 | |
| 3398 | public function strreplace( $orig, $old, $new ) { |
| 3399 | return $this->platform->strreplace( $orig, $old, $new ); |
| 3400 | } |
| 3401 | |
| 3402 | public function timestamp( $ts = 0 ) { |
| 3403 | return $this->platform->timestamp( $ts ); |
| 3404 | } |
| 3405 | |
| 3406 | public function timestampOrNull( $ts = null ) { |
| 3407 | return $this->platform->timestampOrNull( $ts ); |
| 3408 | } |
| 3409 | |
| 3410 | public function getInfinity() { |
| 3411 | return $this->platform->getInfinity(); |
| 3412 | } |
| 3413 | |
| 3414 | public function encodeExpiry( $expiry ) { |
| 3415 | return $this->platform->encodeExpiry( $expiry ); |
| 3416 | } |
| 3417 | |
| 3418 | public function decodeExpiry( $expiry, $format = TS_MW ) { |
| 3419 | return $this->platform->decodeExpiry( $expiry, $format ); |
| 3420 | } |
| 3421 | |
| 3422 | public function setTableAliases( array $aliases ) { |
| 3423 | $this->platform->setTableAliases( $aliases ); |
| 3424 | } |
| 3425 | |
| 3426 | public function getTableAliases() { |
| 3427 | return $this->platform->getTableAliases(); |
| 3428 | } |
| 3429 | |
| 3430 | public function setIndexAliases( array $aliases ) { |
| 3431 | $this->platform->setIndexAliases( $aliases ); |
| 3432 | } |
| 3433 | |
| 3434 | public function buildGroupConcatField( |
| 3435 | $delim, $tables, $field, $conds = '', $join_conds = [] |
| 3436 | ) { |
| 3437 | return $this->platform->buildGroupConcatField( $delim, $tables, $field, $conds, $join_conds ); |
| 3438 | } |
| 3439 | |
| 3440 | public function buildSelectSubquery( |
| 3441 | $tables, $vars, $conds = '', $fname = __METHOD__, |
| 3442 | $options = [], $join_conds = [] |
| 3443 | ) { |
| 3444 | return $this->platform->buildSelectSubquery( $tables, $vars, $conds, $fname, $options, $join_conds ); |
| 3445 | } |
| 3446 | |
| 3447 | public function buildExcludedValue( $column ) { |
| 3448 | return $this->platform->buildExcludedValue( $column ); |
| 3449 | } |
| 3450 | |
| 3451 | public function setSchemaVars( $vars ) { |
| 3452 | $this->platform->setSchemaVars( $vars ); |
| 3453 | } |
| 3454 | |
| 3455 | /* End of methods delegated to SQLPlatform. */ |
| 3456 | |
| 3457 | /* Start of methods delegated to ReplicationReporter. */ |
| 3458 | public function primaryPosWait( DBPrimaryPos $pos, $timeout ) { |
| 3459 | return $this->replicationReporter->primaryPosWait( $this, $pos, $timeout ); |
| 3460 | } |
| 3461 | |
| 3462 | public function getPrimaryPos() { |
| 3463 | return $this->replicationReporter->getPrimaryPos( $this ); |
| 3464 | } |
| 3465 | |
| 3466 | public function getLag() { |
| 3467 | return $this->replicationReporter->getLag( $this ); |
| 3468 | } |
| 3469 | |
| 3470 | public function getSessionLagStatus() { |
| 3471 | return $this->replicationReporter->getSessionLagStatus( $this ); |
| 3472 | } |
| 3473 | |
| 3474 | /* End of methods delegated to ReplicationReporter. */ |
| 3475 | } |