Inherits Wikimedia\Rdbms\Database.

Collaboration diagram for Wikimedia\Rdbms\DatabaseMySQL:

[legend]

Public Member Functions

__construct (array $params)

Additional $params include:

doLock (string $lockName, string $method, int $timeout)

doLockIsFree (string $lockName, string $method)

doUnlock (string $lockName, string $method)

duplicateTableStructure ( $oldName, $newName, $temporary=false, $fname=__METHOD__)

estimateRowCount ( $tables, $var=' *', $conds='', $fname=__METHOD__, $options=[], $join_conds=[])

Estimate rows in dataset Returns estimated count, based on EXPLAIN output Takes same arguments as Database::select()

fieldInfo ( $table, $field)

getServerVersion ()

getSoftwareLink ()

getType ()

indexInfo ( $table, $index, $fname=__METHOD__)

Get information about an index into an object Returns false if the index does not exist.

insertId ()

Get the sequence-based ID assigned by the last query method call.

lastErrno ()

lastError ()

listTables ( $prefix=null, $fname=__METHOD__)

List all tables on the database.

listViews ( $prefix=null, $fname=__METHOD__)

Lists VIEWs in the database.

namedLocksEnqueue ()

Check to see if a named lock used by lock() use blocking queues.

replace ( $table, $uniqueKeys, $rows, $fname=__METHOD__)

Insert row(s) into a table, in the provided order, while deleting conflicting rows.

selectSQLText ( $table, $vars, $conds='', $fname=__METHOD__, $options=[], $join_conds=[])

Take the same arguments as IDatabase::select() and return the SQL it would use.

serverIsReadOnly ()

Returns: bool Whether this DB server is running in server-side read-only mode

Exceptions

DBError If an error occurs, {

See also: query}

Since: 1.28

setSessionOptions (array $options)

streamStatementEnd (&$sql, &$newLine)

strencode ( $s)

tableExists ( $table, $fname=__METHOD__)

Query whether a given table exists.

upsert ( $table, array $rows, $uniqueKeys, array $set, $fname=__METHOD__)

Upsert row(s) into a table, in the provided order, while updating conflicting rows.

wasDeadlock ()

Determines if the last failure was due to a deadlock.

wasReadOnlyError ()

Determines if the last failure was due to the database being read-only.

Public Member Functions inherited from Wikimedia\Rdbms\Database

__clone ()

Make sure that copies do not share the same client binding handle.

__destruct ()

Run a few simple checks and close dangling connections.

__sleep ()

Called by serialize.

__toString ()

Get a debugging string that mentions the database type, the ID of this instance, and the ID of any underlying connection resource or driver object if one is present.

addIdentifierQuotes ( $s)

Escape a SQL identifier (e.g.

addQuotes ( $s)

Escape and quote a raw value string for use in a SQL query.

affectedRows ()

Get the number of rows affected by the last query method call.

anyChar ()

Returns a token for buildLike() that denotes a '_' to be used in a LIKE query.

anyString ()

Returns a token for buildLike() that denotes a '' to be used in a LIKE query.

begin ( $fname=__METHOD__, $mode=self::TRANSACTION_EXPLICIT)

Begin a transaction.

bitAnd ( $fieldLeft, $fieldRight)

bitNot ( $field)

bitOr ( $fieldLeft, $fieldRight)

buildComparison (string $op, array $conds)

Build a condition comparing multiple values, for use with indexes that cover multiple fields, common when e.g.

buildConcat ( $stringList)

Build a concatenation list to feed into a SQL query.

buildExcludedValue ( $column)

Build a reference to a column value from the conflicting proposed upsert() row.

buildGreatest ( $fields, $values)

Build a GREATEST function statement comparing columns/values.

buildGroupConcatField ( $delim, $table, $field, $conds='', $join_conds=[])

Build a GROUP_CONCAT or equivalent statement for a query.

buildIntegerCast ( $field)

buildLeast ( $fields, $values)

Build a LEAST function statement comparing columns/values.

buildLike ( $param,... $params)

LIKE statement wrapper.

buildSelectSubquery ( $table, $vars, $conds='', $fname=__METHOD__, $options=[], $join_conds=[])

Equivalent to IDatabase::selectSQLText() except wraps the result in Subquery.

buildStringCast ( $field)

buildSubstring ( $input, $startPosition, $length=null)

cancelAtomic ( $fname=__METHOD__, AtomicSectionIdentifier $sectionId=null)

Cancel an atomic section of SQL statements.

clearFlag ( $flag, $remember=self::REMEMBER_NOTHING)

Clear a flag for this connection.

close ( $fname=__METHOD__)

Close the database connection.

commit ( $fname=__METHOD__, $flush=self::FLUSHING_ONE)

Commits a transaction previously started using begin()

conditional ( $cond, $caseTrueExpression, $caseFalseExpression)

Returns an SQL expression for a simple conditional.

connectionErrorLogger ( $errno, $errstr)

Error handler for logging errors during database connection.

databasesAreIndependent ()

Returns true if DBs are assumed to be on potentially different servers.

dbSchema ( $schema=null)

Get/set the db schema.

decodeBlob ( $b)

Some DBMSs return a special placeholder object representing blob fields in result objects.

decodeExpiry ( $expiry, $format=TS_MW)

Decode an expiry time into a DBMS independent format.

delete ( $table, $conds, $fname=__METHOD__)

Delete all rows in a table that match a condition.

deleteJoin ( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname=__METHOD__)

Delete all rows in a table that match a condition which includes a join.

doAtomicSection ( $fname, callable $callback, $cancelable=self::ATOMIC_NOT_CANCELABLE)

Perform an atomic section of reversible SQL statements from a callback.

dropTable ( $table, $fname=__METHOD__)

Delete a table.

encodeBlob ( $b)

Some DBMSs have a special format for inserting into blob fields, they don't allow simple quoted strings to be inserted.

encodeExpiry ( $expiry)

Encode an expiry time into the DBMS dependent format.

endAtomic ( $fname=__METHOD__)

Ends an atomic section of SQL statements.

explicitTrxActive ()

Check whether there is a transaction open at the specific request of a caller.

expr (string $field, string $op, $value)

See Expression::__construct()

factorConds ( $condsArray)

Given an array of condition arrays representing an OR list of AND lists, for example:

fieldExists ( $table, $field, $fname=__METHOD__)

Determines whether a field exists in a table.

flushSession ( $fname=__METHOD__, $flush=self::FLUSHING_ONE)

Release important session-level state (named lock, table locks) as post-rollback cleanup.

flushSnapshot ( $fname=__METHOD__, $flush=self::FLUSHING_ONE)

Commit any transaction but error out if writes or callbacks are pending.

getDBname ()

Get the current database name; null if there isn't one.

getDomainID ()

Return the currently selected domain ID.

getFlag ( $flag)

Returns a boolean whether the flag $flag is set for this connection.

getInfinity ()

Find out when 'infinity' is.

getLag ()

Get the seconds of replication lag on this database server.

getLBInfo ( $name=null)

Get properties passed down from the server info array of the load balancer.

getPrimaryPos ()

Get the replication position of this primary DB server.

getReplicaPos ()

Get the replication position of this replica DB.

getScopedLockAndFlush ( $lockKey, $fname, $timeout)

Acquire a named lock, flush any transaction, and return an RAII style unlocker object.

getServer ()

Get the hostname or IP address of the server.

getServerInfo ()

Get a human-readable string describing the current software version.

getServerName ()

Get the readable name for the server.

getSessionLagStatus ()

Get a cached estimate of the seconds of replication lag on this database server, using the estimate obtained at the start of the current transaction if one is active.

getTableAliases ()

Return current table aliases.

getTopologyBasedServerId ()

Get a non-recycled ID that uniquely identifies this server within the replication topology.

getTopologyRole ()

Get the replication topology role of this server.

implicitOrderby ()

Returns true if this database does an implicit order by when the column has an index For example: SELECT page_title FROM page LIMIT 1.

indexExists ( $table, $index, $fname=__METHOD__)

Determines whether an index exists.

indexUnique ( $table, $index, $fname=__METHOD__)

Determines if a given index is unique.

initConnection ()

Initialize the connection to the database over the wire (or to local files)

insert ( $table, $rows, $fname=__METHOD__, $options=[])

Insert row(s) into a table, in the provided order.

insertSelect ( $destTable, $srcTable, $varMap, $conds, $fname=__METHOD__, $insertOptions=[], $selectOptions=[], $selectJoinConds=[])

INSERT SELECT wrapper.

isOpen ()

isQuotedIdentifier ( $name)

isReadOnly ()

Check if this DB server is marked as read-only according to load balancer info.

lastDoneWrites ()

Get the last time the connection may have been used for a write query.

limitResult ( $sql, $limit, $offset=false)

Construct a LIMIT query with optional offset.

lock ( $lockName, $method, $timeout=5, $flags=0)

Acquire a named lock.Named locks are not related to transactions

Parameters

string	$lockName	Name of lock to acquire
string	$method	Name of the calling method
int	$timeout	Acquisition timeout in seconds (0 means non-blocking)
int	$flags	Bit field of IDatabase::LOCK_* constants

Returns: bool|float|null Success (bool); acquisition time (float/null) if LOCK_TIMESTAMP

Exceptions

DBError If an error occurs, {

See also: query}

lockForUpdate ( $table, $conds='', $fname=__METHOD__, $options=[], $join_conds=[])

Lock all rows meeting the given conditions/options FOR UPDATE.

lockIsFree ( $lockName, $method)

Check to see if a named lock is not locked by any thread (non-blocking)

Parameters

string	$lockName	Name of lock to poll
string	$method	Name of method calling us

Returns: bool

Exceptions

DBError If an error occurs, {

See also: query}

Since: 1.20

makeList (array $a, $mode=self::LIST_COMMA)

Makes an encoded list of strings from an array.

makeWhereFrom2d ( $data, $baseKey, $subKey)

Build a "OR" condition with pairs from a two-dimensional array.

newDeleteQueryBuilder ()

Get a DeleteQueryBuilder bound to this connection.

newInsertQueryBuilder ()

Get a InsertQueryBuilder bound to this connection.

newReplaceQueryBuilder ()

Get a ReplaceQueryBuilder bound to this connection.

newSelectQueryBuilder ()

Get a SelectQueryBuilder bound to this connection.

newUnionQueryBuilder ()

Get a UnionQueryBuilder bound to this connection.

newUpdateQueryBuilder ()

Get an UpdateQueryBuilder bound to this connection.

nextSequenceValue ( $seqName)

Deprecated method, calls should be removed.

onAtomicSectionCancel (callable $callback, $fname=__METHOD__)

Run a callback when the atomic section is cancelled.

onTransactionCommitOrIdle (callable $callback, $fname=__METHOD__)

Run a callback when the current transaction commits or now if there is none.

onTransactionPreCommitOrIdle (callable $callback, $fname=__METHOD__)

Run a callback before the current transaction commits or now if there is none.

onTransactionResolution (callable $callback, $fname=__METHOD__)

Run a callback when the current transaction commits or rolls back.

pendingWriteAndCallbackCallers ()

pendingWriteCallers ()

Get the list of method names that did write queries for this transaction.

pendingWriteQueryDuration ( $type=self::ESTIMATE_TOTAL)

Get the time spend running write queries for this transaction.

ping ()

Ping the server and try to reconnect if it there is no connection.

primaryPosWait (DBPrimaryPos $pos, $timeout)

Wait for the replica server to catch up to a given primary server position.

query ( $sql, $fname=__METHOD__, $flags=0)

Run an SQL query statement and return the result.

reportQueryError ( $error, $errno, $sql, $fname, $ignore=false)

Report a query error.

restoreFlags ( $state=self::RESTORE_PRIOR)

Restore the flags to their prior state before the last setFlag/clearFlag call.

rollback ( $fname=__METHOD__, $flush=self::FLUSHING_ONE)

Rollback a transaction previously started using begin()

runOnTransactionIdleCallbacks ( $trigger, array &$errors=[])

Consume and run any "on transaction idle/resolution" callbacks.

runOnTransactionPreCommitCallbacks ()

runTransactionListenerCallbacks ( $trigger, array &$errors=[])

Actually run any "transaction listener" callbacks.

select ( $table, $vars, $conds='', $fname=__METHOD__, $options=[], $join_conds=[])

Execute a SELECT query constructed using the various parameters provided.

selectDomain ( $domain)

Set the current domain (database, schema, and table prefix)

selectField ( $table, $var, $cond='', $fname=__METHOD__, $options=[], $join_conds=[])

A SELECT wrapper which returns a single field from a single result row.

selectFieldValues ( $table, $var, $cond='', $fname=__METHOD__, $options=[], $join_conds=[])

A SELECT wrapper which returns a list of single field values from result rows.

selectRow ( $table, $vars, $conds, $fname=__METHOD__, $options=[], $join_conds=[])

Wrapper to IDatabase::select() that only fetches one row (via LIMIT)

selectRowCount ( $tables, $var=' *', $conds='', $fname=__METHOD__, $options=[], $join_conds=[])

Get the number of rows in dataset.

sessionLocksPending ()

setFlag ( $flag, $remember=self::REMEMBER_NOTHING)

Set a flag for this connection.

setIndexAliases (array $aliases)

Convert certain index names to alternative names before querying the DB.

setLBInfo ( $nameOrArray, $value=null)

Set the entire array or a particular key of the managing load balancer info array.

setLogger (LoggerInterface $logger)

Set the PSR-3 logger interface to use.

setSchemaVars ( $vars)

Set schema variables to be used when streaming commands from SQL files or stdin.

setTableAliases (array $aliases)

Make certain table names use their own database, schema, and table prefix when passed into SQL queries pre-escaped and without a qualified database name.

setTransactionListener ( $name, callable $callback=null)

Run a callback after each time any transaction commits or rolls back.

setTransactionManager (TransactionManager $transactionManager)

setTrxEndCallbackSuppression ( $suppress)

Whether to disable running of post-COMMIT/ROLLBACK callbacks.

sourceFile ( $filename, callable $lineCallback=null, callable $resultCallback=null, $fname=false, callable $inputCallback=null)

Read and execute SQL commands from a file.

sourceStream ( $fp, callable $lineCallback=null, callable $resultCallback=null, $fname=__METHOD__, callable $inputCallback=null)

Read and execute commands from an open file handle.

startAtomic ( $fname=__METHOD__, $cancelable=self::ATOMIC_NOT_CANCELABLE)

Begin an atomic section of SQL statements.

strreplace ( $orig, $old, $new)

Returns a SQL expression for simple string replacement (e.g.

tableName (string $name, $format='quoted')

Format a table name ready for use in constructing an SQL query.

tableNames (... $tables)

Fetch a number of table names into an associative array.

tableNamesN (... $tables)

Fetch a number of table names into a zero-indexed numerical array.

tablePrefix ( $prefix=null)

Get/set the table prefix.

textFieldSize ( $table, $field)

Returns the size of a text field, or -1 for "unlimited".

timestamp ( $ts=0)

Convert a timestamp in one of the formats accepted by ConvertibleTimestamp to the format used for inserting into timestamp fields in this DBMS.

timestampOrNull ( $ts=null)

Convert a timestamp in one of the formats accepted by ConvertibleTimestamp to the format used for inserting into timestamp fields in this DBMS.

truncate ( $tables, $fname=__METHOD__)

Delete all data in a table(s) and reset any sequences owned by that table(s)

truncateTable ( $table, $fname=__METHOD__)

Delete all data in a table and reset any sequences owned by that table.

trxLevel ()

Gets the current transaction level.

trxStatus ()

trxTimestamp ()

Get the UNIX timestamp of the time that the transaction was established.

unionQueries ( $sqls, $all, $options=[])

Construct a UNION query.

unionSupportsOrderAndLimit ()

Determine if the RDBMS supports ORDER BY and LIMIT for separate subqueries within UNION.

unlock ( $lockName, $method)

Release a lock.Named locks are not related to transactions

Parameters

string	$lockName	Name of lock to release
string	$method	Name of the calling method

Returns: bool Success

Exceptions

DBError If an error occurs, {

See also: query}

update ( $table, $set, $conds, $fname=__METHOD__, $options=[])

Update all rows in a table that match a given condition.

writesOrCallbacksPending ()

Whether there is a transaction open with either possible write queries or unresolved pre-commit/commit/resolution callbacks pending.

writesPending ()

Public Member Functions inherited from Wikimedia\Rdbms\Platform\ISQLPlatform

buildSubString ( $input, $startPosition, $length=null)

Build a SUBSTRING function.

Protected Member Functions
	checkInsertWarnings (Query $query, $fname)
	Check for warnings after performing an INSERT query, and throw exceptions if necessary.

	closeConnection ()
	Closes underlying database connection.

	doFlushSession ( $fname)
	Reset the server-side session state for named locks and table locks.

	doHandleSessionLossPreconnect ()
	Reset any additional subclass trx* and session* fields.

	doSelectDomain (DatabaseDomain $domain)

	doSingleStatementQuery (string $sql)
	Run a query and return a QueryStatus instance with the query result information.

	isConnectionError ( $errno)
	Do not use this method outside of Database/DBError classes.

	isInsertSelectSafe (array $insertOptions, array $selectOptions)

	isKnownStatementRollbackError ( $errno)

	isQueryTimeoutError ( $errno)
	Checks whether the cause of the error is detected to be a timeout.

	lastInsertId ()
	Get a row ID from the last insert statement to implicitly assign one within the session.

	open ( $server, $user, $password, $db, $schema, $tablePrefix)
	Open a new connection to the database (closing any existing one)

Protected Member Functions inherited from Wikimedia\Rdbms\Database
	assertHasConnectionHandle ()
	Make sure there is an open connection handle (alive or not)

	commenceCriticalSection (string $fname)
	Demark the start of a critical section of session/transaction state changes.

	completeCriticalSection (string $fname, ?CriticalSectionScope $csm, Throwable $trxError=null)
	Demark the completion of a critical section of session/transaction state changes.

	doBegin ( $fname)
	Issues the BEGIN command to the database server.

	doInsertSelectNative ( $destTable, $srcTable, array $varMap, $conds, $fname, array $insertOptions, array $selectOptions, $selectJoinConds)
	Native server-side implementation of insertSelect() for situations where we don't want to select everything into memory.

	executeQuery ( $sql, $fname, $flags)
	Execute a query without enforcing public (non-Database) caller restrictions.

	getBindingHandle ()
	Get the underlying binding connection handle.

	getInsertIdColumnForUpsert ( $table)

	getLastPHPError ()

	getLogContext (array $extras=[])
	Create a log context to pass to PSR-3 logger functions.

	getReadOnlyReason ()

	getTransactionRoundId ()

	getValueTypesForWithClause ( $table)

	installErrorHandler ()
	Set a custom error handler for logging errors during database connection.

	newExceptionAfterConnectError ( $error)

	registerTempTables (Query $query)
	Register creation and dropping of temporary tables.

	replaceLostConnection ( $lastErrno, $fname)
	Close any existing (dead) database connection and open a new connection.

	restoreErrorHandler ()
	Restore the previous error handler and return the last PHP error for this DB.

Protected Attributes
SQLPlatform	$platform

MysqlReplicationReporter	$replicationReporter

Protected Attributes inherited from Wikimedia\Rdbms\Database
string	$agent
	Agent name for query profiling.

bool	$cliMode
	Whether this PHP instance is for a CLI script.

object resource null	$conn
	Database connection.

array< string, mixed >	$connectionParams
	Connection parameters used by initConnection() and open()

string[] int[] float[]	$connectionVariables
	SQL variables values to use for all new connections.

int null	$connectTimeout
	Maximum seconds to wait on connection attempts.

CriticalSectionProvider null	$csProvider

DatabaseDomain	$currentDomain

string false	$delimiter = ';'
	Current SQL query delimiter.

callable	$deprecationLogger
	Deprecation logging callback.

callable	$errorLogger
	Error logging callback.

DatabaseFlags	$flagsHolder

string	$lastConnectError = ''
	Last error during connection; empty string if none.

int null	$lastEmulatedAffectedRows
	Affected row count for the last query method call; null if unspecified.

int null	$lastEmulatedInsertId
	Insert (row) ID for the last query method call; null if unspecified.

int	$lastQueryAffectedRows = 0
	Affected row count for the last statement to query()

int null	$lastQueryInsertId
	Insert (row) ID for the last statement to query() (null if not supported)

array	$lbInfo = []
	Current LoadBalancer tracking information.

LoggerInterface	$logger

int	$nonNativeInsertSelectBatchSize
	Row batch size to use for emulated INSERT SELECT queries.

SQLPlatform	$platform

callable null	$profiler

int null	$receiveTimeout
	Maximum seconds to wait on receiving query results.

ReplicationReporter	$replicationReporter

string null	$serverName
	Readable name or host/IP of the database server.

array< string, array >	$sessionNamedLocks = []
	Map of (name => (UNIX time,trx ID)) for current lock() mutexes.

array< string, TempTableInfo >	$sessionTempTables = []
	Current temp tables.

bool	$ssl
	Whether to use SSL connections.

bool	$strictWarnings
	Whether to check for warnings.

const	CONN_HOST = 'host'
	Hostname or IP address to use on all connections.

const	CONN_INITIAL_DB = 'dbname'
	Database name to use on initial connection.

const	CONN_INITIAL_SCHEMA = 'schema'
	Schema name to use on initial connection.

const	CONN_INITIAL_TABLE_PREFIX = 'tablePrefix'
	Table prefix to use on initial connection.

const	CONN_PASSWORD = 'password'
	Database server password to use on all connections.

const	CONN_USER = 'user'
	Database server username to use on all connections.

const	DROPPED_CONN_BLAME_THRESHOLD_SEC = 3.0
	Assume that queries taking this long to yield connection loss errors are at fault.

const	ERR_ABORT_QUERY = 2
	Abort query (no retries) due to a statement rollback (session/transaction intact)

const	ERR_ABORT_SESSION = 8
	Abort and reset session due to server-side session-level state loss (locks, temp tables)

const	ERR_ABORT_TRX = 4
	Abort any current transaction, by rolling it back, due to an error during the query.

const	ERR_NONE = 0
	No errors occurred during the query.

const	ERR_RETRY_QUERY = 1
	Retry query due to a connection loss detected while sending the query (session intact)

Additional Inherited Members
Static Public Member Functions inherited from Wikimedia\Rdbms\Database
static	getAttributes ()

static	getCacheSetOptions (?IReadableDatabase ... $dbs)
	Merge the result of getSessionLagStatus() for several DBs using the most pessimistic values to estimate the lag of any data derived from them in combination.

Public Attributes inherited from Wikimedia\Rdbms\IDatabase
const	LOCK_TIMESTAMP = 1
	Flag to return the lock acquisition timestamp (null if not acquired)

Public Attributes inherited from Wikimedia\Rdbms\Platform\ISQLPlatform
const	QUERY_PSEUDO_PERMANENT = 2
	Track a TEMPORARY table CREATE as if it was for a permanent table (for testing)

Public Attributes inherited from Wikimedia\Rdbms\Database\IDatabaseFlags
const	DBO_COMPRESS = 512
	Enable compression in connection protocol.

const	DBO_DDLMODE = 128
	Schema file mode; was used by Oracle.

const	DBO_DEBUG = 1
	Enable debug logging of all SQL queries.

const	DBO_DEFAULT = 16
	Join load balancer transaction rounds (which control DBO_TRX) in non-CLI mode.

const	DBO_GAUGE = 1024
	Optimize connection for guaging server state (e.g.

const	DBO_IGNORE = 4
	Unused since 1.31.

const	DBO_NOBUFFER = 2
	Unused since 1.34.

const	DBO_PERSISTENT = 32
	Use DB persistent connections if possible.

const	DBO_SSL = 256
	Enable SSL/TLS in connection protocol.

const	DBO_SYSDBA = 64
	DBA session mode; was used by Oracle.

const	DBO_TRX = 8
	Automatically start a transaction before running a query if none is active.

const	REMEMBER_NOTHING = ''
	Do not remember the prior flags.

const	REMEMBER_PRIOR = 'remember'
	Remember the prior flags.

const	RESTORE_INITIAL = 'initial'
	Restore to the initial flag state.

const	RESTORE_PRIOR = 'prior'
	Restore to the prior flag state.

Detailed Description

Definition at line 42 of file DatabaseMySQL.php.

Constructor & Destructor Documentation

◆ __construct()

Wikimedia\Rdbms\DatabaseMySQL::__construct ( array $params )

Additional $params include:

lagDetectionMethod : set to one of (Seconds_Behind_Master,pt-heartbeat). pt-heartbeat assumes the table is at heartbeat.heartbeat and uses UTC timestamps in the heartbeat.ts column. (https://www.percona.com/doc/percona-toolkit/2.2/pt-heartbeat.html)
lagDetectionOptions : if using pt-heartbeat, this can be set to an array map. The "conds" key overrides the WHERE clause used to find the relevant row in the heartbeat table, e.g. ['shard' => 's1']. By default, the row used is the newest row having a server_id matching that of the immediate replication source server for the given replica.
useGTIDs : use GTID methods like MASTER_GTID_WAIT() when possible.
sslKeyPath : path to key file [default: null]
sslCertPath : path to certificate file [default: null]
sslCAFile: path to a single certificate authority PEM file [default: null]
sslCAPath : parth to certificate authority PEM directory [default: null]
sslCiphers : array list of allowable ciphers [default: null]
Parameters

array $params

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 87 of file DatabaseMySQL.php.

References $params.

Member Function Documentation

◆ checkInsertWarnings()

Wikimedia\Rdbms\DatabaseMySQL::checkInsertWarnings	(	Query	$query,
			$fname )

protected

Check for warnings after performing an INSERT query, and throw exceptions if necessary.

Parameters

Query	$query
string	$fname

Returns: void

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 256 of file DatabaseMySQL.php.

References Wikimedia\Rdbms\Query\getSQL(), and Wikimedia\Rdbms\Database\reportQueryError().

◆ closeConnection()

Wikimedia\Rdbms\DatabaseMySQL::closeConnection ( )

protected

Closes underlying database connection.

Returns: bool Whether connection was closed successfully

Since: 1.20

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 854 of file DatabaseMySQL.php.

◆ doFlushSession()

Wikimedia\Rdbms\DatabaseMySQL::doFlushSession ( $fname )

protected

Reset the server-side session state for named locks and table locks.

Connection and query errors will be suppressed and logged

Parameters

string $fname

Since: 1.38

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 544 of file DatabaseMySQL.php.

◆ doHandleSessionLossPreconnect()

Wikimedia\Rdbms\DatabaseMySQL::doHandleSessionLossPreconnect ( )

protected

Reset any additional subclass trx* and session* fields.

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 862 of file DatabaseMySQL.php.

◆ doLock()

Wikimedia\Rdbms\DatabaseMySQL::doLock	(	string	$lockName,
		string	$method,
		int	$timeout )

See also: lock()

Parameters

string	$lockName
string	$method
int	$timeout

Returns: float|null UNIX timestamp of lock acquisition; null on failure

Exceptions

DBError

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 524 of file DatabaseMySQL.php.

◆ doLockIsFree()

Wikimedia\Rdbms\DatabaseMySQL::doLockIsFree	(	string	$lockName,
		string	$method )

See also: lockIsFree()

Parameters

string	$lockName
string	$method

Returns: bool Success

Exceptions

DBError

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 516 of file DatabaseMySQL.php.

◆ doSelectDomain()

Wikimedia\Rdbms\DatabaseMySQL::doSelectDomain ( DatabaseDomain $domain )

protected

Parameters

DatabaseDomain $domain

Exceptions

DBConnectionError
DBError

Since: 1.32

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 178 of file DatabaseMySQL.php.

References Wikimedia\Rdbms\Database\addIdentifierQuotes(), Wikimedia\Rdbms\Database\executeQuery(), Wikimedia\Rdbms\DatabaseDomain\getDatabase(), Wikimedia\Rdbms\Database\getDBname(), Wikimedia\Rdbms\DatabaseDomain\getSchema(), Wikimedia\Rdbms\DatabaseDomain\getTablePrefix(), and Wikimedia\Rdbms\Database\reportQueryError().

◆ doSingleStatementQuery()

Wikimedia\Rdbms\DatabaseMySQL::doSingleStatementQuery ( string $sql )

protected

Run a query and return a QueryStatus instance with the query result information.

This is meant to handle the basic command of actually sending a query to the server via the driver. No implicit transaction, reconnection, nor retry logic should happen here. The higher level query() method is designed to handle those sorts of concerns. This method should not trigger such higher level methods.

The lastError() and lastErrno() methods should meaningfully reflect what error, if any, occurred during the last call to this method. Methods like executeQuery(), query(), select(), insert(), update(), delete(), and upsert() implement their calls to doQuery() such that an immediately subsequent call to lastError()/lastErrno() meaningfully reflects any error that occurred during that public query method call.

For SELECT queries, the result field contains either:

a) A driver-specific IResultWrapper describing the query results
b) False, on any query failure

For non-SELECT queries, the result field contains either:

a) A driver-specific IResultWrapper, only on success
b) True, only on success (e.g. no meaningful result other than "OK")
c) False, on any query failure

Parameters

string $sql Single-statement SQL query

Returns: QueryStatus

Since: 1.39

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 751 of file DatabaseMySQL.php.

◆ doUnlock()

Wikimedia\Rdbms\DatabaseMySQL::doUnlock	(	string	$lockName,
		string	$method )

See also: unlock()

Parameters

string	$lockName
string	$method

Returns: bool Success

Exceptions

DBError

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 532 of file DatabaseMySQL.php.

◆ duplicateTableStructure()

Wikimedia\Rdbms\DatabaseMySQL::duplicateTableStructure	(	$oldName,
		$newName,
		$temporary = false,
		$fname = __METHOD__ )

Parameters

string	$oldName
string	$newName
bool	$temporary
string	$fname

Returns: bool

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 654 of file DatabaseMySQL.php.

◆ estimateRowCount()

Wikimedia\Rdbms\DatabaseMySQL::estimateRowCount	(	$tables,
		$var = '*',
		$conds = '',
		$fname = __METHOD__,
		$options = [],
		$join_conds = [] )

Estimate rows in dataset Returns estimated count, based on EXPLAIN output Takes same arguments as Database::select()

Parameters

string \| array	$tables
string \| array	$var
string \| array	$conds
string	$fname
string \| array	$options
array	$join_conds

Returns: int

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 298 of file DatabaseMySQL.php.

◆ fieldInfo()

Wikimedia\Rdbms\DatabaseMySQL::fieldInfo	(		$table,
			$field )

Parameters

string	$table
string	$field

Returns: MySQLField|false

Implements Wikimedia\Rdbms\IMaintainableDatabase.

Definition at line 359 of file DatabaseMySQL.php.

◆ getServerVersion()

Wikimedia\Rdbms\DatabaseMySQL::getServerVersion ( )

Returns: string

Implements Wikimedia\Rdbms\IReadableDatabase.

Definition at line 463 of file DatabaseMySQL.php.

◆ getSoftwareLink()

Wikimedia\Rdbms\DatabaseMySQL::getSoftwareLink ( )

Returns: string

Implements Wikimedia\Rdbms\IReadableDatabase.

Definition at line 429 of file DatabaseMySQL.php.

◆ getType()

Wikimedia\Rdbms\DatabaseMySQL::getType ( )

Returns: string

Implements Wikimedia\Rdbms\IReadableDatabase.

Definition at line 115 of file DatabaseMySQL.php.

◆ indexInfo()

Wikimedia\Rdbms\DatabaseMySQL::indexInfo	(	$table,
		$index,
		$fname = __METHOD__ )

Get information about an index into an object Returns false if the index does not exist.

Parameters

string	$table
string	$index
string	$fname

Returns: bool|array|null False or null on failure

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 383 of file DatabaseMySQL.php.

◆ insertId()

Wikimedia\Rdbms\DatabaseMySQL::insertId ( )

Get the sequence-based ID assigned by the last query method call.

This method should only be called when all the following hold true:

(a) A method call was made to insert(), upsert(), replace(), or insertSelect()
(b) The method call attempts to insert exactly one row
(c) The method call omits the value of exactly one auto-increment column
(d) The method call succeeded
(e) No subsequent method calls were made, with the exception of affectedRows(), lastErrno(), lastError(), and getType()

In all other cases, the return value is unspecified.

When the query method is either insert() with "IGNORE", upsert(), or insertSelect(), callers should first check affectedRows() before calling this method, making sure that the query method actually created a row. Otherwise, an ID from a previous insert might be incorrectly assumed to belong to last insert.

Returns: int

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 867 of file DatabaseMySQL.php.

◆ isConnectionError()

Wikimedia\Rdbms\DatabaseMySQL::isConnectionError ( $errno )

protected

Do not use this method outside of Database/DBError classes.

Parameters

int | string $errno

Returns: bool Whether the given query error was a connection drop

Since: 1.38

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 623 of file DatabaseMySQL.php.

◆ isInsertSelectSafe()

Wikimedia\Rdbms\DatabaseMySQL::isInsertSelectSafe	(	array	$insertOptions,
		array	$selectOptions )

protected

Parameters

array	$insertOptions
array	$selectOptions

Returns: bool Whether an INSERT SELECT with these options will be replication safe

Since: 1.31

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 233 of file DatabaseMySQL.php.

◆ isKnownStatementRollbackError()

Wikimedia\Rdbms\DatabaseMySQL::isKnownStatementRollbackError ( $errno )

protected

Parameters

int | string $errno

Returns: bool Whether it is known that the last query error only caused statement rollback

Note: This is for backwards compatibility for callers catching DBError exceptions in order to ignore problems like duplicate key errors or foreign key violations

Since: 1.39

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 637 of file DatabaseMySQL.php.

◆ isQueryTimeoutError()

Wikimedia\Rdbms\DatabaseMySQL::isQueryTimeoutError ( $errno )

protected

Checks whether the cause of the error is detected to be a timeout.

It returns false by default, and not all engines support detecting this yet. If this returns false, it will be treated as a generic query error.

Parameters

int | string $errno Error number

Returns: bool

Since: 1.39

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 630 of file DatabaseMySQL.php.

◆ lastErrno()

Wikimedia\Rdbms\DatabaseMySQL::lastErrno ( )

Returns: int

Implements Wikimedia\Rdbms\IReadableDatabase.

Definition at line 880 of file DatabaseMySQL.php.

◆ lastError()

Wikimedia\Rdbms\DatabaseMySQL::lastError ( )

Returns: string

Implements Wikimedia\Rdbms\IReadableDatabase.

Definition at line 219 of file DatabaseMySQL.php.

References Wikimedia\Rdbms\Database\$lastConnectError.

Referenced by Wikimedia\Rdbms\DatabaseMySQL\open().

◆ lastInsertId()

Wikimedia\Rdbms\DatabaseMySQL::lastInsertId ( )

protected

Get a row ID from the last insert statement to implicitly assign one within the session.

If the statement involved assigning sequence IDs to multiple rows, then the return value will be any one of those values (database-specific). If the statement was an "UPSERT" and some existing rows were updated, then the result will either reflect only IDs of created rows or it will reflect IDs of both created and updated rows (this is database-specific).

The result is unspecified if the statement gave an error.

Returns: int Sequence ID, 0 (if none)

Exceptions

DBError

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 858 of file DatabaseMySQL.php.

◆ listTables()

Wikimedia\Rdbms\DatabaseMySQL::listTables	(		$prefix = null,
			$fname = __METHOD__ )

List all tables on the database.

Parameters

string \| null	$prefix	Only show tables with this prefix, e.g. mw_
string	$fname	Calling function name

Returns: array

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 678 of file DatabaseMySQL.php.

References Wikimedia\Rdbms\IExpression\LIKE.

◆ listViews()

Wikimedia\Rdbms\DatabaseMySQL::listViews	(		$prefix = null,
			$fname = __METHOD__ )

Lists VIEWs in the database.

Since: 1.22

Deprecated: since 1.42

Parameters

string \| null	$prefix	Only show VIEWs with this prefix, eg. unit_test_, or $wgDBprefix. Default: null, would return all views.
string	$fname	Name of calling function

Returns: array

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 706 of file DatabaseMySQL.php.

References Wikimedia\Rdbms\IExpression\LIKE, and wfDeprecated().

◆ namedLocksEnqueue()

Wikimedia\Rdbms\DatabaseMySQL::namedLocksEnqueue ( )

Check to see if a named lock used by lock() use blocking queues.

Returns: bool

Since: 1.26

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 540 of file DatabaseMySQL.php.

◆ open()

Wikimedia\Rdbms\DatabaseMySQL::open	(	$server,
		$user,
		$password,
		$db,
		$schema,
		$tablePrefix )

protected

Open a new connection to the database (closing any existing one)

Parameters

string | null $server Server host/address and optional port {

See also: connectionParams}

Parameters

string | null $user User name {

See also: connectionParams}

Parameters

string | null $password User password {

See also: connectionParams}

Parameters

string \| null	$db	Database name
string \| null	$schema	Database schema name
string	$tablePrefix

Exceptions

DBConnectionError

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 119 of file DatabaseMySQL.php.

References Wikimedia\Rdbms\Database\addQuotes(), Wikimedia\Rdbms\Database\close(), Wikimedia\Rdbms\Database\executeQuery(), Wikimedia\Rdbms\Database\installErrorHandler(), Wikimedia\Rdbms\DatabaseMySQL\lastError(), Wikimedia\Rdbms\Database\newExceptionAfterConnectError(), Wikimedia\Rdbms\Database\reportQueryError(), and Wikimedia\Rdbms\Database\restoreErrorHandler().

◆ replace()

Wikimedia\Rdbms\DatabaseMySQL::replace	(	$table,
		$uniqueKeys,
		$rows,
		$fname = __METHOD__ )

Insert row(s) into a table, in the provided order, while deleting conflicting rows.

Conflicts are determined by the provided unique indexes. Note that it is possible for the provided rows to conflict even among themselves; it is preferable for the caller to de-duplicate such input beforehand.

Note some important implications of the deletion semantics:

If the table has an AUTOINCREMENT column and $rows omit that column, then any conflicting existing rows will be replaced with newer having higher values for that column, even if nothing else changed.
There might be worse contention than upsert() due to the use of gap-locking. This does not apply to RDBMS types that use predicate locking nor those that just lock the whole table or databases anyway.

This operation will be seen by affectedRows()/insertId() as one query statement, regardless of how many statements are actually sent by the class implementation.

Access: internal: callers outside of rdbms library should use ReplaceQueryBuilder instead.

Parameters

string	$table	The table name
string \| string[] \| string[][]	$uniqueKeys	Column name or non-empty list of column name lists that define all applicable unique keys on the table. There must only be one such key. Each unique key on the table is "applicable" unless either: It involves an AUTOINCREMENT column for which no values are assigned in $rows It involves a UUID column for which newly generated UUIDs are assigned in $rows
array \| array[]	$rows	Row(s) to insert, in the form of either: A string-keyed map of (column name => value) defining a new row. Values are treated as literals and quoted appropriately; null is interpreted as NULL. Columns belonging to a key in $uniqueKeys must be defined here and non-null. An integer-keyed list of such string-keyed maps, defining a list of new rows. The keys in each map must be identical to each other and in the same order. The rows must not collide with each other.
string	$fname	Calling function name (use METHOD) for logs/profiling

Exceptions

DBError If an error occurs, {

See also: query}

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 587 of file DatabaseMySQL.php.

◆ selectSQLText()

Wikimedia\Rdbms\DatabaseMySQL::selectSQLText	(	$table,
		$vars,
		$conds = '',
		$fname = __METHOD__,
		$options = [],
		$join_conds = [] )

Take the same arguments as IDatabase::select() and return the SQL it would use.

This can be useful for making UNION queries, where the SQL text of each query is needed. In general, however, callers outside of Database classes should just use select().

See also: IDatabase::select()

Parameters

string \| array	$table	Table name(s)
string \| array	$vars	Field names
string \| array	$conds	Conditions
string	$fname	Caller function name
string \| array	$options	Query options
string \| array	$join_conds	Join conditions

Returns: string SQL query string

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 722 of file DatabaseMySQL.php.

◆ serverIsReadOnly()

Wikimedia\Rdbms\DatabaseMySQL::serverIsReadOnly ( )

Returns: bool Whether this DB server is running in server-side read-only mode

Exceptions

DBError If an error occurs, {

See also: query}

Since: 1.28

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 416 of file DatabaseMySQL.php.

◆ setSessionOptions()

Wikimedia\Rdbms\DatabaseMySQL::setSessionOptions ( array $options )

Parameters

array $options

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 479 of file DatabaseMySQL.php.

◆ streamStatementEnd()

Wikimedia\Rdbms\DatabaseMySQL::streamStatementEnd	(	&	$sql,
		&	$newLine )

Parameters

string	&$sql
string	&$newLine

Returns: bool

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 507 of file DatabaseMySQL.php.

◆ strencode()

Wikimedia\Rdbms\DatabaseMySQL::strencode ( $s )

Parameters

string $s

Returns: string

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 412 of file DatabaseMySQL.php.

◆ tableExists()

Wikimedia\Rdbms\DatabaseMySQL::tableExists	(		$table,
			$fname = __METHOD__ )

Query whether a given table exists.

Parameters

string	$table
string	$fname

Returns: bool

Exceptions

DBError If an error occurs, {

See also: query}

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 329 of file DatabaseMySQL.php.

◆ upsert()

Wikimedia\Rdbms\DatabaseMySQL::upsert	(		$table,
		array	$rows,
			$uniqueKeys,
		array	$set,
			$fname = __METHOD__ )

Upsert row(s) into a table, in the provided order, while updating conflicting rows.

Conflicts are determined by the provided unique indexes. Note that it is possible for the provided rows to conflict even among themselves; it is preferable for the caller to de-duplicate such input beforehand.

This operation will be seen by affectedRows()/insertId() as one query statement, regardless of how many statements are actually sent by the class implementation.

Access: internal: callers outside of rdbms library should use InsertQueryBuilder instead.

Parameters

string	$table	Table name
array \| array[]	$rows	Row(s) to insert, in the form of either: A string-keyed map of (column name => value) defining a new row. Values are treated as literals and quoted appropriately; null is interpreted as NULL. Columns belonging to a key in $uniqueKeys must be defined here and non-null. An integer-keyed list of such string-keyed maps, defining a list of new rows. The keys in each map must be identical to each other and in the same order. The rows must not collide with each other.
string \| string[] \| string[][]	$uniqueKeys	Column name or non-empty list of column name lists that define all applicable unique keys on the table. There must only be one such key. Each unique key on the table is "applicable" unless either: It involves an AUTOINCREMENT column for which no values are assigned in $rows It involves a UUID column for which newly generated UUIDs are assigned in $rows
array	$set	Combination map/list where each string-keyed entry maps a column to a literal assigned value and each integer-keyed value is a SQL assignment expression of the form "<unquoted alphanumeric column> = <SQL expression>". The (column => value) entries are convenient due to automatic value quoting and conversion of null to NULL. The SQL assignment entries are useful for updates like "column = column + X". All of the assignments have no defined execution order, so callers should make sure that they not depend on each other. Do not modify AUTOINCREMENT or UUID columns in assignments, even if they are just "secondary" unique keys. For multi-row upserts, use buildExcludedValue() to reference the value of a column from the corresponding row in $rows that conflicts with the current row.
string	$fname	Calling function name (use METHOD) for logs/profiling

Exceptions

DBError If an error occurs, {

See also: query}

Since: 1.22

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 563 of file DatabaseMySQL.php.

◆ wasDeadlock()

Wikimedia\Rdbms\DatabaseMySQL::wasDeadlock ( )

Determines if the last failure was due to a deadlock.

Returns: bool

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 609 of file DatabaseMySQL.php.

◆ wasReadOnlyError()

Wikimedia\Rdbms\DatabaseMySQL::wasReadOnlyError ( )

Determines if the last failure was due to the database being read-only.

Returns: bool

Reimplemented from Wikimedia\Rdbms\Database.

Definition at line 618 of file DatabaseMySQL.php.

Member Data Documentation

◆ $platform

SQLPlatform Wikimedia\Rdbms\DatabaseMySQL::$platform

protected

Definition at line 61 of file DatabaseMySQL.php.

◆ $replicationReporter

MysqlReplicationReporter Wikimedia\Rdbms\DatabaseMySQL::$replicationReporter

protected

Definition at line 64 of file DatabaseMySQL.php.

The documentation for this class was generated from the following file:

includes/libs/rdbms/database/DatabaseMySQL.php

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ __construct()

Member Function Documentation

◆ checkInsertWarnings()

◆ closeConnection()

◆ doFlushSession()

◆ doHandleSessionLossPreconnect()

◆ doLock()

◆ doLockIsFree()

◆ doSelectDomain()

◆ doSingleStatementQuery()

◆ doUnlock()

◆ duplicateTableStructure()

◆ estimateRowCount()

◆ fieldInfo()

◆ getServerVersion()

◆ getSoftwareLink()

◆ getType()

◆ indexInfo()

◆ insertId()

◆ isConnectionError()

◆ isInsertSelectSafe()

◆ isKnownStatementRollbackError()

◆ isQueryTimeoutError()

◆ lastErrno()

◆ lastError()

◆ lastInsertId()

◆ listTables()

◆ listViews()

◆ namedLocksEnqueue()

◆ open()

◆ replace()

◆ selectSQLText()

◆ serverIsReadOnly()

◆ setSessionOptions()

◆ streamStatementEnd()

◆ strencode()

◆ tableExists()

◆ upsert()

◆ wasDeadlock()

◆ wasReadOnlyError()

Member Data Documentation

◆ $platform

◆ $replicationReporter