MediaWiki  master
IDatabase.php
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1 <?php
20 namespace Wikimedia\Rdbms;
21 
22 use Exception;
23 use InvalidArgumentException;
24 use stdClass;
25 use Wikimedia\ScopedCallback;
26 
38 interface IDatabase {
40  public const TRIGGER_IDLE = 1;
42  public const TRIGGER_COMMIT = 2;
44  public const TRIGGER_ROLLBACK = 3;
46  public const TRIGGER_CANCEL = 4;
47 
49  public const TRANSACTION_EXPLICIT = '';
51  public const TRANSACTION_INTERNAL = 'implicit';
52 
54  public const ATOMIC_NOT_CANCELABLE = '';
56  public const ATOMIC_CANCELABLE = 'cancelable';
57 
59  public const FLUSHING_ONE = '';
61  public const FLUSHING_ALL_PEERS = 'flush';
63  public const FLUSHING_INTERNAL = 'flush-internal';
64 
66  public const REMEMBER_NOTHING = '';
68  public const REMEMBER_PRIOR = 'remember';
70  public const RESTORE_PRIOR = 'prior';
72  public const RESTORE_INITIAL = 'initial';
73 
75  public const ESTIMATE_TOTAL = 'total';
77  public const ESTIMATE_DB_APPLY = 'apply';
78 
80  public const LIST_COMMA = 0;
82  public const LIST_AND = 1;
84  public const LIST_SET = 2;
86  public const LIST_NAMES = 3;
88  public const LIST_OR = 4;
89 
91  public const DBO_DEBUG = 1;
93  public const DBO_NOBUFFER = 2;
95  public const DBO_IGNORE = 4;
97  public const DBO_TRX = 8;
99  public const DBO_DEFAULT = 16;
101  public const DBO_PERSISTENT = 32;
103  public const DBO_SYSDBA = 64;
105  public const DBO_DDLMODE = 128;
107  public const DBO_SSL = 256;
109  public const DBO_COMPRESS = 512;
110 
112  public const QUERY_NORMAL = 0;
114  public const QUERY_SILENCE_ERRORS = 1; // b/c for 1.32 query() argument; (int)true = 1
119  public const QUERY_PSEUDO_PERMANENT = 2;
121  public const QUERY_REPLICA_ROLE = 4;
123  public const QUERY_IGNORE_DBO_TRX = 8;
125  public const QUERY_NO_RETRY = 16;
127  public const QUERY_CHANGE_NONE = 32;
129  public const QUERY_CHANGE_TRX = 64 | self::QUERY_IGNORE_DBO_TRX;
131  public const QUERY_CHANGE_ROWS = 128;
133  public const QUERY_CHANGE_SCHEMA = 256 | self::QUERY_IGNORE_DBO_TRX;
134 
136  public const UNION_ALL = true;
138  public const UNION_DISTINCT = false;
139 
141  public const LB_TRX_ROUND_ID = 'trxRoundId';
143  public const LB_READ_ONLY_REASON = 'readOnlyReason';
144 
146  public const ROLE_STREAMING_MASTER = 'streaming-master';
148  public const ROLE_STREAMING_REPLICA = 'streaming-replica';
150  public const ROLE_STATIC_CLONE = 'static-clone';
152  public const ROLE_UNKNOWN = 'unknown';
153 
155  public const ALL_ROWS = '*';
156 
164  public function getServerInfo();
165 
172  public function getTopologyRole();
173 
180  public function getTopologyRootMaster();
181 
190  public function trxLevel();
191 
203  public function trxTimestamp();
204 
209  public function explicitTrxActive();
210 
217  public function assertNoOpenTransactions();
218 
225  public function tablePrefix( $prefix = null );
226 
233  public function dbSchema( $schema = null );
234 
241  public function getLBInfo( $name = null );
242 
251  public function setLBInfo( $nameOrArray, $value = null );
252 
259  public function implicitOrderby();
260 
266  public function lastQuery();
267 
274  public function lastDoneWrites();
275 
280  public function writesPending();
281 
286  public function preCommitCallbacksPending();
287 
296  public function writesOrCallbacksPending();
297 
307  public function pendingWriteQueryDuration( $type = self::ESTIMATE_TOTAL );
308 
315  public function pendingWriteCallers();
316 
323  public function pendingWriteRowsAffected();
324 
328  public function isOpen();
329 
336  public function setFlag( $flag, $remember = self::REMEMBER_NOTHING );
337 
344  public function clearFlag( $flag, $remember = self::REMEMBER_NOTHING );
345 
352  public function restoreFlags( $state = self::RESTORE_PRIOR );
353 
360  public function getFlag( $flag );
361 
369  public function getDomainID();
370 
376  public function getType();
377 
387  public function fetchObject( $res );
388 
398  public function fetchRow( $res );
399 
408  public function numRows( $res );
409 
417  public function numFields( $res );
418 
427  public function fieldName( $res, $n );
428 
438  public function insertId();
439 
447  public function dataSeek( $res, $row );
448 
455  public function lastErrno();
456 
463  public function lastError();
464 
473  public function affectedRows();
474 
482  public function getSoftwareLink();
483 
489  public function getServerVersion();
490 
503  public function close( $fname = __METHOD__, $owner = null );
504 
532  public function query( $sql, $fname = __METHOD__, $flags = 0 );
533 
542  public function freeResult( $res );
543 
550  public function newSelectQueryBuilder();
551 
567  public function selectField(
568  $table, $var, $cond = '', $fname = __METHOD__, $options = [], $join_conds = []
569  );
570 
588  public function selectFieldValues(
589  $table, $var, $cond = '', $fname = __METHOD__, $options = [], $join_conds = []
590  );
591 
769  public function select(
770  $table,
771  $vars,
772  $conds = '',
773  $fname = __METHOD__,
774  $options = [],
775  $join_conds = []
776  );
777 
795  public function selectSQLText(
796  $table,
797  $vars,
798  $conds = '',
799  $fname = __METHOD__,
800  $options = [],
801  $join_conds = []
802  );
803 
820  public function selectRow(
821  $table,
822  $vars,
823  $conds,
824  $fname = __METHOD__,
825  $options = [],
826  $join_conds = []
827  );
828 
851  public function estimateRowCount(
852  $tables, $var = '*', $conds = '', $fname = __METHOD__, $options = [], $join_conds = []
853  );
854 
873  public function selectRowCount(
874  $tables, $var = '*', $conds = '', $fname = __METHOD__, $options = [], $join_conds = []
875  );
876 
889  public function lockForUpdate(
890  $table, $conds = '', $fname = __METHOD__, $options = [], $join_conds = []
891  );
892 
902  public function fieldExists( $table, $field, $fname = __METHOD__ );
903 
913  public function indexExists( $table, $index, $fname = __METHOD__ );
914 
923  public function tableExists( $table, $fname = __METHOD__ );
924 
944  public function insert( $table, $rows, $fname = __METHOD__, $options = [] );
945 
970  public function update( $table, $set, $conds, $fname = __METHOD__, $options = [] );
971 
997  public function makeList( array $a, $mode = self::LIST_COMMA );
998 
1015  public function makeWhereFrom2d( $data, $baseKey, $subKey );
1016 
1026  public function aggregateValue( $valuedata, $valuename = 'value' );
1027 
1032  public function bitNot( $field );
1033 
1039  public function bitAnd( $fieldLeft, $fieldRight );
1040 
1046  public function bitOr( $fieldLeft, $fieldRight );
1047 
1053  public function buildConcat( $stringList );
1054 
1071  public function buildGroupConcatField(
1072  $delim, $table, $field, $conds = '', $join_conds = []
1073  );
1074 
1089  public function buildGreatest( $fields, $values );
1090 
1105  public function buildLeast( $fields, $values );
1106 
1119  public function buildSubString( $input, $startPosition, $length = null );
1120 
1126  public function buildStringCast( $field );
1127 
1133  public function buildIntegerCast( $field );
1134 
1149  public function buildSelectSubquery(
1150  $table,
1151  $vars,
1152  $conds = '',
1153  $fname = __METHOD__,
1154  $options = [],
1155  $join_conds = []
1156  );
1157 
1175  public function limitResult( $sql, $limit, $offset = false );
1176 
1189  public function databasesAreIndependent();
1190 
1202  public function selectDB( $db );
1203 
1216  public function selectDomain( $domain );
1217 
1222  public function getDBname();
1223 
1228  public function getServer();
1229 
1236  public function addQuotes( $s );
1237 
1247  public function addIdentifierQuotes( $s );
1248 
1268  public function buildLike( $param, ...$params );
1269 
1275  public function anyChar();
1276 
1282  public function anyString();
1283 
1300  public function nextSequenceValue( $seqName );
1301 
1329  public function replace( $table, $uniqueKeys, $rows, $fname = __METHOD__ );
1330 
1363  public function upsert(
1364  $table, array $rows, $uniqueKeys, array $set, $fname = __METHOD__
1365  );
1366 
1387  public function deleteJoin(
1388  $delTable,
1389  $joinTable,
1390  $delVar,
1391  $joinVar,
1392  $conds,
1393  $fname = __METHOD__
1394  );
1395 
1408  public function delete( $table, $conds, $fname = __METHOD__ );
1409 
1440  public function insertSelect(
1441  $destTable,
1442  $srcTable,
1443  $varMap,
1444  $conds,
1445  $fname = __METHOD__,
1446  $insertOptions = [],
1447  $selectOptions = [],
1448  $selectJoinConds = []
1449  );
1450 
1456  public function unionSupportsOrderAndLimit();
1457 
1467  public function unionQueries( $sqls, $all );
1468 
1496  $table,
1497  $vars,
1498  array $permute_conds,
1499  $extra_conds = '',
1500  $fname = __METHOD__,
1501  $options = [],
1502  $join_conds = []
1503  );
1504 
1515  public function conditional( $cond, $trueVal, $falseVal );
1516 
1525  public function strreplace( $orig, $old, $new );
1526 
1533  public function getServerUptime();
1534 
1542  public function wasDeadlock();
1543 
1551  public function wasLockTimeout();
1552 
1561  public function wasConnectionLoss();
1562 
1568  public function wasReadOnlyError();
1569 
1577  public function wasErrorReissuable();
1578 
1593  public function masterPosWait( DBMasterPos $pos, $timeout );
1594 
1601  public function getReplicaPos();
1602 
1609  public function getMasterPos();
1610 
1615  public function serverIsReadOnly();
1616 
1641  public function onTransactionResolution( callable $callback, $fname = __METHOD__ );
1642 
1678  public function onTransactionCommitOrIdle( callable $callback, $fname = __METHOD__ );
1679 
1688  public function onTransactionIdle( callable $callback, $fname = __METHOD__ );
1689 
1716  public function onTransactionPreCommitOrIdle( callable $callback, $fname = __METHOD__ );
1717 
1741  public function onAtomicSectionCancel( callable $callback, $fname = __METHOD__ );
1742 
1760  public function setTransactionListener( $name, callable $callback = null );
1761 
1836  public function startAtomic( $fname = __METHOD__, $cancelable = self::ATOMIC_NOT_CANCELABLE );
1837 
1849  public function endAtomic( $fname = __METHOD__ );
1850 
1876  public function cancelAtomic( $fname = __METHOD__, AtomicSectionIdentifier $sectionId = null );
1877 
1950  public function doAtomicSection(
1951  $fname, callable $callback, $cancelable = self::ATOMIC_NOT_CANCELABLE
1952  );
1953 
1973  public function begin( $fname = __METHOD__, $mode = self::TRANSACTION_EXPLICIT );
1974 
1993  public function commit( $fname = __METHOD__, $flush = self::FLUSHING_ONE );
1994 
2014  public function rollback( $fname = __METHOD__, $flush = self::FLUSHING_ONE );
2015 
2035  public function flushSnapshot( $fname = __METHOD__, $flush = self::FLUSHING_ONE );
2036 
2048  public function timestamp( $ts = 0 );
2049 
2064  public function timestampOrNull( $ts = null );
2065 
2072  public function ping( &$rtt = null );
2073 
2082  public function getLag();
2083 
2098  public function getSessionLagStatus();
2099 
2105  public function maxListLen();
2106 
2117  public function encodeBlob( $b );
2118 
2128  public function decodeBlob( $b );
2129 
2141  public function setSessionOptions( array $options );
2142 
2150  public function setSchemaVars( $vars );
2151 
2161  public function lockIsFree( $lockName, $method );
2162 
2174  public function lock( $lockName, $method, $timeout = 5 );
2175 
2186  public function unlock( $lockName, $method );
2187 
2209  public function getScopedLockAndFlush( $lockKey, $fname, $timeout );
2210 
2217  public function namedLocksEnqueue();
2218 
2226  public function getInfinity();
2227 
2234  public function encodeExpiry( $expiry );
2235 
2243  public function decodeExpiry( $expiry, $format = TS_MW );
2244 
2254  public function setBigSelects( $value = true );
2255 
2260  public function isReadOnly();
2261 
2275  public function setTableAliases( array $aliases );
2276 
2289  public function setIndexAliases( array $aliases );
2290 
2298  public function __toString();
2299 }
2300 
2304 class_alias( IDatabase::class, 'IDatabase' );
DBO_PERSISTENT
const DBO_PERSISTENT
Definition: defines.php:14
Wikimedia\Rdbms\IDatabase\isOpen
isOpen()
Wikimedia\Rdbms\IDatabase\affectedRows
affectedRows()
Get the number of rows affected by the last write query.
Wikimedia\Rdbms\IDatabase\setBigSelects
setBigSelects( $value=true)
Allow or deny "big selects" for this session only.
Wikimedia\Rdbms\IDatabase\getServer
getServer()
Get the server hostname or IP address.
Wikimedia\Rdbms\IDatabase\getServerVersion
getServerVersion()
A string describing the current software version, like from mysql_get_server_info()
Wikimedia\Rdbms\IDatabase\onAtomicSectionCancel
onAtomicSectionCancel(callable $callback, $fname=__METHOD__)
Run a callback when the atomic section is cancelled.
Wikimedia\Rdbms\IDatabase\maxListLen
maxListLen()
Return the maximum number of items allowed in a list, or 0 for unlimited.
Wikimedia\Rdbms\IDatabase\getInfinity
getInfinity()
Find out when 'infinity' is.
Wikimedia\Rdbms\IDatabase\insertSelect
insertSelect( $destTable, $srcTable, $varMap, $conds, $fname=__METHOD__, $insertOptions=[], $selectOptions=[], $selectJoinConds=[])
INSERT SELECT wrapper.
Wikimedia\Rdbms\IDatabase\unionQueries
unionQueries( $sqls, $all)
Construct a UNION query.
Wikimedia\Rdbms\IDatabase\pendingWriteQueryDuration
pendingWriteQueryDuration( $type=self::ESTIMATE_TOTAL)
Get the time spend running write queries for this transaction.
Wikimedia\Rdbms\IDatabase\tablePrefix
tablePrefix( $prefix=null)
Get/set the table prefix.
Wikimedia\Rdbms\IDatabase\writesPending
writesPending()
Wikimedia\Rdbms\IDatabase\rollback
rollback( $fname=__METHOD__, $flush=self::FLUSHING_ONE)
Rollback a transaction previously started using begin()
Wikimedia\Rdbms\IDatabase\replace
replace( $table, $uniqueKeys, $rows, $fname=__METHOD__)
Insert row(s) into a table, deleting all conflicting rows beforehand.
Wikimedia\Rdbms\IDatabase\numRows
numRows( $res)
Get the number of rows in a query result.
Wikimedia\Rdbms\IDatabase\setLBInfo
setLBInfo( $nameOrArray, $value=null)
Set the entire array or a particular key of the managing load balancer info array.
Wikimedia\Rdbms\IDatabase\cancelAtomic
cancelAtomic( $fname=__METHOD__, AtomicSectionIdentifier $sectionId=null)
Cancel an atomic section of SQL statements.
Wikimedia\Rdbms\IDatabase\ping
ping(&$rtt=null)
Ping the server and try to reconnect if it there is no connection.
Wikimedia\Rdbms\IDatabase\numFields
numFields( $res)
Get the number of fields in a result object.
Wikimedia\Rdbms\IDatabase\bitNot
bitNot( $field)
Wikimedia\Rdbms\IDatabase\getMasterPos
getMasterPos()
Get the position of this master.
Wikimedia\Rdbms\IDatabase\wasErrorReissuable
wasErrorReissuable()
Determines if the last query error was due to something outside of the query itself.
Wikimedia\Rdbms\IDatabase\encodeExpiry
encodeExpiry( $expiry)
Encode an expiry time into the DBMS dependent format.
Wikimedia\Rdbms\IDatabase\upsert
upsert( $table, array $rows, $uniqueKeys, array $set, $fname=__METHOD__)
Upsert the given row(s) into a table.
Wikimedia\Rdbms\IDatabase\lastError
lastError()
Get a description of the last error.
DBO_DEBUG
const DBO_DEBUG
Definition: defines.php:9
Wikimedia\Rdbms\IDatabase\endAtomic
endAtomic( $fname=__METHOD__)
Ends an atomic section of SQL statements.
Wikimedia\Rdbms\IDatabase\trxLevel
trxLevel()
Gets the current transaction level.
Wikimedia\Rdbms\IDatabase\implicitOrderby
implicitOrderby()
Returns true if this database does an implicit order by when the column has an index For example: SEL...
Wikimedia\Rdbms
Definition: ChronologyProtector.php:24
Wikimedia\Rdbms\IDatabase\getServerInfo
getServerInfo()
Get a human-readable string describing the current software version.
Wikimedia\Rdbms\DBMasterPos
An object representing a master or replica DB position in a replicated setup.
Definition: DBMasterPos.php:14
Wikimedia\Rdbms\IDatabase\trxTimestamp
trxTimestamp()
Get the UNIX timestamp of the time that the transaction was established.
$s
$s
Definition: mergeMessageFileList.php:184
DBO_SSL
const DBO_SSL
Definition: defines.php:17
DBO_IGNORE
const DBO_IGNORE
Definition: defines.php:11
Wikimedia\Rdbms\IDatabase\decodeBlob
decodeBlob( $b)
Some DBMSs return a special placeholder object representing blob fields in result objects.
Wikimedia\Rdbms\IDatabase\getSessionLagStatus
getSessionLagStatus()
Get the replica DB lag when the current transaction started or a general lag estimate if not transact...
Wikimedia\Rdbms\IDatabase\selectField
selectField( $table, $var, $cond='', $fname=__METHOD__, $options=[], $join_conds=[])
A SELECT wrapper which returns a single field from a single result row.
Wikimedia\Rdbms\IDatabase\getLag
getLag()
Get the amount of replication lag for this database server.
Wikimedia\Rdbms\IDatabase\buildGreatest
buildGreatest( $fields, $values)
Build a GREATEST function statement comparing columns/values.
Wikimedia\Rdbms\IDatabase\onTransactionCommitOrIdle
onTransactionCommitOrIdle(callable $callback, $fname=__METHOD__)
Run a callback as soon as there is no transaction pending.
Wikimedia\Rdbms\IDatabase\isReadOnly
isReadOnly()
$res
$res
Definition: testCompression.php:57
DBO_TRX
const DBO_TRX
Definition: defines.php:12
Wikimedia\Rdbms\IDatabase\dbSchema
dbSchema( $schema=null)
Get/set the db schema.
Wikimedia\Rdbms\IDatabase\tableExists
tableExists( $table, $fname=__METHOD__)
Query whether a given table exists.
LIST_AND
const LIST_AND
Definition: Defines.php:48
Wikimedia\Rdbms\IDatabase
Basic database interface for live and lazy-loaded relation database handles.
Definition: IDatabase.php:38
Wikimedia\Rdbms\IDatabase\fieldName
fieldName( $res, $n)
Get a field name in a result object.
Wikimedia\Rdbms\IDatabase\lastDoneWrites
lastDoneWrites()
Get the last time the connection may have been used for a write query.
DBO_NOBUFFER
const DBO_NOBUFFER
Definition: defines.php:10
Wikimedia\Rdbms\IDatabase\update
update( $table, $set, $conds, $fname=__METHOD__, $options=[])
Update all rows in a table that match a given condition.
Wikimedia\Rdbms\IDatabase\fetchObject
fetchObject( $res)
Fetch the next row from the given result object, in object form.
Wikimedia\Rdbms\IDatabase\getServerUptime
getServerUptime()
Determines how long the server has been up.
Wikimedia\Rdbms\IDatabase\lock
lock( $lockName, $method, $timeout=5)
Acquire a named lock.
Wikimedia\Rdbms\IDatabase\buildSelectSubquery
buildSelectSubquery( $table, $vars, $conds='', $fname=__METHOD__, $options=[], $join_conds=[])
Equivalent to IDatabase::selectSQLText() except wraps the result in Subquery.
Wikimedia\Rdbms\IDatabase\unionSupportsOrderAndLimit
unionSupportsOrderAndLimit()
Determine if the RDBMS supports ORDER BY and LIMIT for separate subqueries within UNION.
Wikimedia\Rdbms\IDatabase\getSoftwareLink
getSoftwareLink()
Returns a wikitext style link to the DB's website (e.g.
Wikimedia\Rdbms\IDatabase\timestamp
timestamp( $ts=0)
Convert a timestamp in one of the formats accepted by ConvertibleTimestamp to the format used for ins...
LIST_OR
const LIST_OR
Definition: Defines.php:51
Wikimedia\Rdbms\IDatabase\freeResult
freeResult( $res)
Free a result object returned by query() or select()
Wikimedia\Rdbms\IDatabase\encodeBlob
encodeBlob( $b)
Some DBMSs have a special format for inserting into blob fields, they don't allow simple quoted strin...
Wikimedia\Rdbms\IDatabase\deleteJoin
deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname=__METHOD__)
DELETE where the condition is a join.
Wikimedia\Rdbms\IDatabase\__toString
__toString()
Get a debugging string that mentions the database type, the ID of this instance, and the ID of any un...
Wikimedia\Rdbms\IDatabase\getTopologyRole
getTopologyRole()
Get the replication topology role of this server.
Wikimedia\Rdbms\IDatabase\lockForUpdate
lockForUpdate( $table, $conds='', $fname=__METHOD__, $options=[], $join_conds=[])
Lock all rows meeting the given conditions/options FOR UPDATE.
LIST_SET
const LIST_SET
Definition: Defines.php:49
Wikimedia\Rdbms\IDatabase\databasesAreIndependent
databasesAreIndependent()
Returns true if DBs are assumed to be on potentially different servers.
Wikimedia\Rdbms\IDatabase\close
close( $fname=__METHOD__, $owner=null)
Close the database connection.
Wikimedia\Rdbms\IDatabase\limitResult
limitResult( $sql, $limit, $offset=false)
Construct a LIMIT query with optional offset.
Wikimedia\Rdbms\IDatabase\wasDeadlock
wasDeadlock()
Determines if the last failure was due to a deadlock.
Wikimedia\Rdbms\IDatabase\anyChar
anyChar()
Returns a token for buildLike() that denotes a '_' to be used in a LIKE query.
Wikimedia\Rdbms\IDatabase\preCommitCallbacksPending
preCommitCallbacksPending()
Wikimedia\Rdbms\IDatabase\query
query( $sql, $fname=__METHOD__, $flags=0)
Run an SQL query and return the result.
Wikimedia\Rdbms\IDatabase\decodeExpiry
decodeExpiry( $expiry, $format=TS_MW)
Decode an expiry time into a DBMS independent format.
Wikimedia\Rdbms\IDatabase\setIndexAliases
setIndexAliases(array $aliases)
Convert certain index names to alternative names before querying the DB.
Wikimedia\Rdbms\IDatabase\wasLockTimeout
wasLockTimeout()
Determines if the last failure was due to a lock timeout.
Wikimedia\Rdbms\IDatabase\buildLeast
buildLeast( $fields, $values)
Build a LEAST function statement comparing columns/values.
Wikimedia\Rdbms\IDatabase\assertNoOpenTransactions
assertNoOpenTransactions()
Assert that all explicit transactions or atomic sections have been closed.
LIST_COMMA
const LIST_COMMA
Definition: Defines.php:47
Wikimedia\Rdbms\IDatabase\setTableAliases
setTableAliases(array $aliases)
Make certain table names use their own database, schema, and table prefix when passed into SQL querie...
Wikimedia\Rdbms\IDatabase\buildSubString
buildSubString( $input, $startPosition, $length=null)
Build a SUBSTRING function.
DBO_COMPRESS
const DBO_COMPRESS
Definition: defines.php:18
Wikimedia\Rdbms\IDatabase\unlock
unlock( $lockName, $method)
Release a lock.
Wikimedia\Rdbms\IDatabase\lastQuery
lastQuery()
Get the last query that sent on account of IDatabase::query()
Wikimedia\Rdbms\IDatabase\selectRow
selectRow( $table, $vars, $conds, $fname=__METHOD__, $options=[], $join_conds=[])
Wrapper to IDatabase::select() that only fetches one row (via LIMIT)
DBO_DDLMODE
const DBO_DDLMODE
Definition: defines.php:16
Wikimedia\Rdbms\IDatabase\getScopedLockAndFlush
getScopedLockAndFlush( $lockKey, $fname, $timeout)
Acquire a named lock, flush any transaction, and return an RAII style unlocker object.
Wikimedia\Rdbms\IDatabase\selectRowCount
selectRowCount( $tables, $var=' *', $conds='', $fname=__METHOD__, $options=[], $join_conds=[])
Get the number of rows in dataset.
Wikimedia\Rdbms\IDatabase\explicitTrxActive
explicitTrxActive()
Wikimedia\Rdbms\IDatabase\buildStringCast
buildStringCast( $field)
Wikimedia\Rdbms\IDatabase\getDomainID
getDomainID()
Return the currently selected domain ID.
Wikimedia\Rdbms\IDatabase\buildConcat
buildConcat( $stringList)
Build a concatenation list to feed into a SQL query.
Wikimedia\Rdbms\IDatabase\wasConnectionLoss
wasConnectionLoss()
Determines if the last query error was due to a dropped connection.
Wikimedia\Rdbms\IDatabase\setTransactionListener
setTransactionListener( $name, callable $callback=null)
Run a callback after each time any transaction commits or rolls back.
Wikimedia\Rdbms\AtomicSectionIdentifier
Class used for token representing identifiers for atomic sections from IDatabase instances.
Definition: AtomicSectionIdentifier.php:26
Wikimedia\Rdbms\IDatabase\getDBname
getDBname()
Get the current DB name.
Wikimedia\Rdbms\IDatabase\wasReadOnlyError
wasReadOnlyError()
Determines if the last failure was due to the database being read-only.
Wikimedia\Rdbms\IDatabase\strreplace
strreplace( $orig, $old, $new)
Returns a SQL expression for simple string replacement (e.g.
Wikimedia\Rdbms\IDatabase\bitOr
bitOr( $fieldLeft, $fieldRight)
Wikimedia\Rdbms\IDatabase\pendingWriteCallers
pendingWriteCallers()
Get the list of method names that did write queries for this transaction.
Wikimedia\Rdbms\IDatabase\fetchRow
fetchRow( $res)
Fetch the next row from the given result object, in associative array form.
DBO_SYSDBA
const DBO_SYSDBA
Definition: defines.php:15
Wikimedia\Rdbms\IDatabase\anyString
anyString()
Returns a token for buildLike() that denotes a '' to be used in a LIKE query.
Wikimedia\Rdbms\IDatabase\getReplicaPos
getReplicaPos()
Get the replication position of this replica DB.
Wikimedia\Rdbms\IDatabase\getFlag
getFlag( $flag)
Returns a boolean whether the flag $flag is set for this connection.
Wikimedia\Rdbms\IDatabase\masterPosWait
masterPosWait(DBMasterPos $pos, $timeout)
Wait for the replica DB to catch up to a given master position.
Wikimedia\Rdbms\IDatabase\insert
insert( $table, $rows, $fname=__METHOD__, $options=[])
Insert the given row(s) into a table.
Wikimedia\Rdbms\IDatabase\onTransactionIdle
onTransactionIdle(callable $callback, $fname=__METHOD__)
Alias for onTransactionCommitOrIdle() for backwards-compatibility.
Wikimedia\Rdbms\IDatabase\bitAnd
bitAnd( $fieldLeft, $fieldRight)
Wikimedia\Rdbms\IDatabase\lockIsFree
lockIsFree( $lockName, $method)
Check to see if a named lock is not locked by any thread (non-blocking)
Wikimedia\Rdbms\IDatabase\selectDB
selectDB( $db)
Change the current database.
Wikimedia\Rdbms\IDatabase\doAtomicSection
doAtomicSection( $fname, callable $callback, $cancelable=self::ATOMIC_NOT_CANCELABLE)
Perform an atomic section of reversable SQL statements from a callback.
Wikimedia\Rdbms\IDatabase\lastErrno
lastErrno()
Get the last error number.
Wikimedia\Rdbms\IDatabase\fieldExists
fieldExists( $table, $field, $fname=__METHOD__)
Determines whether a field exists in a table.
Wikimedia\Rdbms\IDatabase\aggregateValue
aggregateValue( $valuedata, $valuename='value')
Return aggregated value alias.
Wikimedia\Rdbms\IDatabase\selectSQLText
selectSQLText( $table, $vars, $conds='', $fname=__METHOD__, $options=[], $join_conds=[])
Take the same arguments as IDatabase::select() and return the SQL it would use.
Wikimedia\Rdbms\IDatabase\setSchemaVars
setSchemaVars( $vars)
Set schema variables to be used when streaming commands from SQL files or stdin.
Wikimedia\Rdbms\IDatabase\addQuotes
addQuotes( $s)
Escape and quote a raw value string for use in a SQL query.
Wikimedia\Rdbms\IDatabase\unionConditionPermutations
unionConditionPermutations( $table, $vars, array $permute_conds, $extra_conds='', $fname=__METHOD__, $options=[], $join_conds=[])
Construct a UNION query for permutations of conditions.
Wikimedia\Rdbms\IDatabase\selectDomain
selectDomain( $domain)
Set the current domain (database, schema, and table prefix)
Wikimedia\Rdbms\IDatabase\onTransactionPreCommitOrIdle
onTransactionPreCommitOrIdle(callable $callback, $fname=__METHOD__)
Run a callback before the current transaction commits or now if there is none.
Wikimedia\Rdbms\IDatabase\makeWhereFrom2d
makeWhereFrom2d( $data, $baseKey, $subKey)
Build a partial where clause from a 2-d array such as used for LinkBatch.
Wikimedia\Rdbms\IDatabase\selectFieldValues
selectFieldValues( $table, $var, $cond='', $fname=__METHOD__, $options=[], $join_conds=[])
A SELECT wrapper which returns a list of single field values from result rows.
Wikimedia\Rdbms\IDatabase\getType
getType()
Get the type of the DBMS (e.g.
Wikimedia\Rdbms\IDatabase\getTopologyRootMaster
getTopologyRootMaster()
Get the host (or address) of the root master server for the replication topology.
Wikimedia\Rdbms\IDatabase\select
select( $table, $vars, $conds='', $fname=__METHOD__, $options=[], $join_conds=[])
Execute a SELECT query constructed using the various parameters provided.
Wikimedia\Rdbms\IDatabase\getLBInfo
getLBInfo( $name=null)
Get properties passed down from the server info array of the load balancer.
Wikimedia\Rdbms\IDatabase\newSelectQueryBuilder
newSelectQueryBuilder()
Create an empty SelectQueryBuilder which can be used to run queries against this connection.
Wikimedia\Rdbms\IDatabase\timestampOrNull
timestampOrNull( $ts=null)
Convert a timestamp in one of the formats accepted by ConvertibleTimestamp to the format used for ins...
Wikimedia\Rdbms\IDatabase\buildGroupConcatField
buildGroupConcatField( $delim, $table, $field, $conds='', $join_conds=[])
Build a GROUP_CONCAT or equivalent statement for a query.
Wikimedia\Rdbms\IDatabase\serverIsReadOnly
serverIsReadOnly()
Wikimedia\Rdbms\IDatabase\estimateRowCount
estimateRowCount( $tables, $var=' *', $conds='', $fname=__METHOD__, $options=[], $join_conds=[])
Estimate the number of rows in dataset.
Wikimedia\Rdbms\IDatabase\dataSeek
dataSeek( $res, $row)
Change the position of the cursor in a result object.
Wikimedia\Rdbms\IDatabase\buildIntegerCast
buildIntegerCast( $field)
LIST_NAMES
const LIST_NAMES
Definition: Defines.php:50
Wikimedia\Rdbms\IDatabase\insertId
insertId()
Get the inserted value of an auto-increment row.
Wikimedia\Rdbms\IDatabase\onTransactionResolution
onTransactionResolution(callable $callback, $fname=__METHOD__)
Run a callback as soon as the current transaction commits or rolls back.
Wikimedia\Rdbms\IDatabase\addIdentifierQuotes
addIdentifierQuotes( $s)
Escape a SQL identifier (e.g.
Wikimedia\Rdbms\IDatabase\setSessionOptions
setSessionOptions(array $options)
Override database's default behavior.
Wikimedia\Rdbms\IDatabase\conditional
conditional( $cond, $trueVal, $falseVal)
Returns an SQL expression for a simple conditional.
Wikimedia\Rdbms\IDatabase\buildLike
buildLike( $param,... $params)
LIKE statement wrapper.
DBO_DEFAULT
const DBO_DEFAULT
Definition: defines.php:13
Wikimedia\Rdbms\IDatabase\setFlag
setFlag( $flag, $remember=self::REMEMBER_NOTHING)
Set a flag for this connection.
Wikimedia\Rdbms\IDatabase\nextSequenceValue
nextSequenceValue( $seqName)
Deprecated method, calls should be removed.
Wikimedia\Rdbms\IDatabase\makeList
makeList(array $a, $mode=self::LIST_COMMA)
Makes an encoded list of strings from an array.
Wikimedia\Rdbms\IDatabase\restoreFlags
restoreFlags( $state=self::RESTORE_PRIOR)
Restore the flags to their prior state before the last setFlag/clearFlag call.
Wikimedia\Rdbms\IDatabase\begin
begin( $fname=__METHOD__, $mode=self::TRANSACTION_EXPLICIT)
Begin a transaction.
Wikimedia\Rdbms\IDatabase\commit
commit( $fname=__METHOD__, $flush=self::FLUSHING_ONE)
Commits a transaction previously started using begin()
Wikimedia\Rdbms\IDatabase\indexExists
indexExists( $table, $index, $fname=__METHOD__)
Determines whether an index exists.
Wikimedia\Rdbms\IDatabase\flushSnapshot
flushSnapshot( $fname=__METHOD__, $flush=self::FLUSHING_ONE)
Commit any transaction but error out if writes or callbacks are pending.
Wikimedia\Rdbms\IDatabase\clearFlag
clearFlag( $flag, $remember=self::REMEMBER_NOTHING)
Clear a flag for this connection.
Wikimedia\Rdbms\IDatabase\pendingWriteRowsAffected
pendingWriteRowsAffected()
Get the number of affected rows from pending write queries.
Wikimedia\Rdbms\IDatabase\namedLocksEnqueue
namedLocksEnqueue()
Check to see if a named lock used by lock() use blocking queues.
$type
$type
Definition: testCompression.php:52
Wikimedia\Rdbms\IDatabase\startAtomic
startAtomic( $fname=__METHOD__, $cancelable=self::ATOMIC_NOT_CANCELABLE)
Begin an atomic section of SQL statements.
Wikimedia\Rdbms\IDatabase\writesOrCallbacksPending
writesOrCallbacksPending()
Whether there is a transaction open with either possible write queries or unresolved pre-commit/commi...