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<?php /** * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file */ namespace Wikimedia\Rdbms; use FSLockManager; use LockManager; use NullLockManager; use PDO; use PDOException; use PDOStatement; use RuntimeException; use Wikimedia\Rdbms\Platform\SqlitePlatform; use Wikimedia\Rdbms\Platform\SQLPlatform; use Wikimedia\Rdbms\Replication\ReplicationReporter; /** * This is the SQLite database abstraction layer. * * See docs/sqlite.txt for development notes about MediaWiki's sqlite schema. * * @ingroup Database */ class DatabaseSqlite extends Database { /** @var string|null Directory for SQLite database files listed under their DB name */ protected $dbDir; /** @var string|null Explicit path for the SQLite database file */ protected $dbPath; /** @var string Transaction mode */ protected $trxMode; /** @var PDO|null */ protected $conn; /** @var LockManager|null (hopefully on the same server as the DB) */ protected $lockMgr; /** @var string|null */ private $version; /** @var array List of shared database already attached to this connection */ private $sessionAttachedDbs = []; /** @var string[] See https://www.sqlite.org/lang_transaction.html */ private const VALID_TRX_MODES = [ '', 'DEFERRED', 'IMMEDIATE', 'EXCLUSIVE' ]; /** @var string[][] */ private const VALID_PRAGMAS = [ // Optimizations or requirements regarding fsync() usage 'synchronous' => [ 'EXTRA', 'FULL', 'NORMAL', 'OFF' ], // Optimizations for TEMPORARY tables 'temp_store' => [ 'FILE', 'MEMORY' ], // Optimizations for disk use and page cache 'mmap_size' => 'integer', // How many DB pages to keep in memory 'cache_size' => 'integer', ]; /** @var SQLPlatform */ protected $platform; /** * Additional params include: * - dbDirectory : directory containing the DB and the lock file directory * - dbFilePath : use this to force the path of the DB file * - trxMode : one of (deferred, immediate, exclusive) * @param array $params */ public function __construct( array $params ) { if ( isset( $params['dbFilePath'] ) ) { $this->dbPath = $params['dbFilePath']; if ( !isset( $params['dbname'] ) || $params['dbname'] === '' ) { $params['dbname'] = self::generateDatabaseName( $this->dbPath ); } } elseif ( isset( $params['dbDirectory'] ) ) { $this->dbDir = $params['dbDirectory']; } parent::__construct( $params ); $this->trxMode = strtoupper( $params['trxMode'] ?? '' ); $this->lockMgr = $this->makeLockManager(); $this->platform = new SqlitePlatform( $this, $this->logger, $this->currentDomain, $this->errorLogger ); $this->replicationReporter = new ReplicationReporter( $params['topologyRole'], $this->logger, $params['srvCache'] ); } public static function getAttributes() { return [ self::ATTR_DB_IS_FILE => true, self::ATTR_DB_LEVEL_LOCKING => true ]; } /** * @param string $filename * @param array $p Options map; supports: * - flags : (same as __construct counterpart) * - trxMode : (same as __construct counterpart) * - dbDirectory : (same as __construct counterpart) * @return DatabaseSqlite * @since 1.25 */ public static function newStandaloneInstance( $filename, array $p = [] ) { $p['dbFilePath'] = $filename; $p['schema'] = null; $p['tablePrefix'] = ''; /** @var DatabaseSqlite $db */ $db = ( new DatabaseFactory() )->create( 'sqlite', $p ); '@phan-var DatabaseSqlite $db'; return $db; } /** * @return string */ public function getType() { return 'sqlite'; } protected function open( $server, $user, $password, $db, $schema, $tablePrefix ) { $this->close( __METHOD__ ); // Note that for SQLite, $server, $user, and $pass are ignored if ( $schema !== null ) { throw $this->newExceptionAfterConnectError( "Got schema '$schema'; not supported." ); } if ( $this->dbPath !== null ) { $path = $this->dbPath; } elseif ( $this->dbDir !== null ) { $path = self::generateFileName( $this->dbDir, $db ); } else { throw $this->newExceptionAfterConnectError( "DB path or directory required" ); } // Check if the database file already exists but is non-readable if ( !self::isProcessMemoryPath( $path ) && is_file( $path ) && !is_readable( $path ) ) { throw $this->newExceptionAfterConnectError( 'SQLite database file is not readable' ); } elseif ( !in_array( $this->trxMode, self::VALID_TRX_MODES, true ) ) { throw $this->newExceptionAfterConnectError( "Got mode '{$this->trxMode}' for BEGIN" ); } $attributes = [ PDO::ATTR_ERRMODE => PDO::ERRMODE_SILENT, // Starting with PHP 8.1, The SQLite PDO returns proper types instead // of strings or null for everything. We cast every non-null value to // string to restore the old behavior. PDO::ATTR_STRINGIFY_FETCHES => true ]; if ( $this->getFlag( self::DBO_PERSISTENT ) ) { // Persistent connections can avoid some schema index reading overhead. // On the other hand, they can cause horrible contention with DBO_TRX. if ( $this->getFlag( self::DBO_TRX ) || $this->getFlag( self::DBO_DEFAULT ) ) { $this->logger->warning( __METHOD__ . ": ignoring DBO_PERSISTENT due to DBO_TRX or DBO_DEFAULT", $this->getLogContext() ); } else { $attributes[PDO::ATTR_PERSISTENT] = true; } } try { // Open the database file, creating it if it does not yet exist $this->conn = new PDO( "sqlite:$path", null, null, $attributes ); } catch ( PDOException $e ) { throw $this->newExceptionAfterConnectError( $e->getMessage() ); } $this->currentDomain = new DatabaseDomain( $db, null, $tablePrefix ); $this->platform->setCurrentDomain( $this->currentDomain ); try { // Enforce LIKE to be case sensitive, just like MySQL $query = new Query( 'PRAGMA case_sensitive_like = 1', self::QUERY_CHANGE_TRX | self::QUERY_NO_RETRY, 'PRAGMA' ); $this->query( $query, __METHOD__ ); // Set any connection-level custom PRAGMA options $pragmas = array_intersect_key( $this->connectionVariables, self::VALID_PRAGMAS ); $pragmas += $this->getDefaultPragmas(); foreach ( $pragmas as $name => $value ) { $allowed = self::VALID_PRAGMAS[$name]; if ( ( is_array( $allowed ) && in_array( $value, $allowed, true ) ) || ( is_string( $allowed ) && gettype( $value ) === $allowed ) ) { $query = new Query( "PRAGMA $name = $value", self::QUERY_CHANGE_TRX | self::QUERY_NO_RETRY, 'PRAGMA', null, "PRAGMA $name = '?'" ); $this->query( $query, __METHOD__ ); } } $this->attachDatabasesFromTableAliases(); } catch ( RuntimeException $e ) { throw $this->newExceptionAfterConnectError( $e->getMessage() ); } } /** * @return array Map of (name => value) for default values to set via PRAGMA */ private function getDefaultPragmas() { $variables = []; if ( !$this->cliMode ) { $variables['temp_store'] = 'MEMORY'; } return $variables; } /** * @return string|null SQLite DB file path * @throws DBUnexpectedError * @since 1.25 */ public function getDbFilePath() { return $this->dbPath ?? self::generateFileName( $this->dbDir, $this->getDBname() ); } /** * @return string|null Lock file directory */ public function getLockFileDirectory() { if ( $this->dbPath !== null && !self::isProcessMemoryPath( $this->dbPath ) ) { return dirname( $this->dbPath ) . '/locks'; } elseif ( $this->dbDir !== null && !self::isProcessMemoryPath( $this->dbDir ) ) { return $this->dbDir . '/locks'; } return null; } /** * Initialize/reset the LockManager instance * * @return LockManager */ private function makeLockManager(): LockManager { $lockDirectory = $this->getLockFileDirectory(); if ( $lockDirectory !== null ) { return new FSLockManager( [ 'domain' => $this->getDomainID(), 'lockDirectory' => $lockDirectory, ] ); } else { return new NullLockManager( [ 'domain' => $this->getDomainID() ] ); } } /** * Does not actually close the connection, just destroys the reference for GC to do its work * @return bool */ protected function closeConnection() { $this->conn = null; // Release all locks, via FSLockManager::__destruct, as the base class expects $this->lockMgr = null; return true; } /** * Generates a database file name. Explicitly public for installer. * @param string $dir Directory where database resides * @param string|null $dbName Database name (or null from Database::factory, validated here) * @return string * @throws DBUnexpectedError */ public static function generateFileName( $dir, $dbName ) { if ( $dir == '' ) { throw new DBUnexpectedError( null, __CLASS__ . ": no DB directory specified" ); } elseif ( self::isProcessMemoryPath( $dir ) ) { throw new DBUnexpectedError( null, __CLASS__ . ": cannot use process memory directory '$dir'" ); } elseif ( !strlen( $dbName ) ) { throw new DBUnexpectedError( null, __CLASS__ . ": no DB name specified" ); } return "$dir/$dbName.sqlite"; } /** * @param string $path * @return string */ private static function generateDatabaseName( $path ) { if ( preg_match( '/^(:memory:$|file::memory:)/', $path ) ) { // E.g. "file::memory:?cache=shared" => ":memory": return ':memory:'; } elseif ( preg_match( '/^file::([^?]+)\?mode=memory(&|$)/', $path, $m ) ) { // E.g. "file:memdb1?mode=memory" => ":memdb1:" return ":{$m[1]}:"; } else { // E.g. "/home/.../some_db.sqlite3" => "some_db" return preg_replace( '/\.sqlite\d?$/', '', basename( $path ) ); } } /** * @param string $path * @return bool */ private static function isProcessMemoryPath( $path ) { return preg_match( '/^(:memory:$|file:(:memory:|[^?]+\?mode=memory(&|$)))/', $path ); } /** * Returns version of currently supported SQLite fulltext search module or false if none present. * @return string|false */ public static function getFulltextSearchModule() { static $cachedResult = null; if ( $cachedResult !== null ) { return $cachedResult; } $cachedResult = false; $table = 'dummy_search_test'; $db = self::newStandaloneInstance( ':memory:' ); if ( $db->query( "CREATE VIRTUAL TABLE $table USING FTS3(dummy_field)", __METHOD__, IDatabase::QUERY_SILENCE_ERRORS ) ) { $cachedResult = 'FTS3'; } $db->close( __METHOD__ ); return $cachedResult; } /** * Attaches external database to the connection handle * * @see https://sqlite.org/lang_attach.html * * @param string $name Database name to be used in queries like * SELECT foo FROM dbname.table * @param bool|string $file Database file name. If omitted, will be generated * using $name and configured data directory * @param string $fname Calling function name @phan-mandatory-param * @return IResultWrapper */ public function attachDatabase( $name, $file = false, $fname = __METHOD__ ) { $file = is_string( $file ) ? $file : self::generateFileName( $this->dbDir, $name ); $encFile = $this->addQuotes( $file ); $query = new Query( "ATTACH DATABASE $encFile AS $name", self::QUERY_CHANGE_TRX, 'ATTACH' ); return $this->query( $query, $fname ); } protected function doSingleStatementQuery( string $sql ): QueryStatus { $res = $this->getBindingHandle()->query( $sql ); // Note that rowCount() returns 0 for SELECT for SQLite return new QueryStatus( $res instanceof PDOStatement ? new SqliteResultWrapper( $res ) : $res, $res ? $res->rowCount() : 0, $this->lastError(), $this->lastErrno() ); } protected function doSelectDomain( DatabaseDomain $domain ) { if ( $domain->getSchema() !== null ) { throw new DBExpectedError( $this, __CLASS__ . ": domain '{$domain->getId()}' has a schema component" ); } $database = $domain->getDatabase(); // A null database means "don't care" so leave it as is and update the table prefix if ( $database === null ) { $this->currentDomain = new DatabaseDomain( $this->currentDomain->getDatabase(), null, $domain->getTablePrefix() ); $this->platform->setCurrentDomain( $this->currentDomain ); return true; } if ( $database !== $this->getDBname() ) { throw new DBExpectedError( $this, __CLASS__ . ": cannot change database (got '$database')" ); } // Update that domain fields on success (no exception thrown) $this->currentDomain = $domain; $this->platform->setCurrentDomain( $domain ); return true; } protected function lastInsertId() { // PDO::lastInsertId yields a string :( return (int)$this->getBindingHandle()->lastInsertId(); } /** * @return string */ public function lastError() { if ( is_object( $this->conn ) ) { $e = $this->conn->errorInfo(); return $e[2] ?? $this->lastConnectError; } return 'No database connection'; } /** * @return int */ public function lastErrno() { if ( is_object( $this->conn ) ) { $info = $this->conn->errorInfo(); if ( isset( $info[1] ) ) { return $info[1]; } } return 0; } public function tableExists( $table, $fname = __METHOD__ ) { [ $db, $pt ] = $this->platform->getDatabaseAndTableIdentifier( $table ); if ( isset( $this->sessionTempTables[$db][$pt] ) ) { return true; // already known to exist } $encTable = $this->addQuotes( $pt ); $query = new Query( "SELECT 1 FROM sqlite_master WHERE type='table' AND name=$encTable", self::QUERY_IGNORE_DBO_TRX | self::QUERY_CHANGE_NONE, 'SELECT' ); $res = $this->query( $query, __METHOD__ ); return (bool)$res->numRows(); } public function indexInfo( $table, $index, $fname = __METHOD__ ) { $indexName = $this->platform->indexName( $index ); $components = $this->platform->qualifiedTableComponents( $table ); $tableRaw = end( $components ); $query = new Query( 'PRAGMA index_list(' . $this->addQuotes( $tableRaw ) . ')', self::QUERY_IGNORE_DBO_TRX | self::QUERY_CHANGE_NONE, 'PRAGMA' ); $res = $this->query( $query, $fname ); foreach ( $res as $row ) { if ( $row->name === $indexName ) { return [ 'unique' => (bool)$row->unique ]; } } return false; } public function replace( $table, $uniqueKeys, $rows, $fname = __METHOD__ ) { $this->platform->normalizeUpsertParams( $uniqueKeys, $rows ); if ( !$rows ) { return; } $encTable = $this->tableName( $table ); [ $sqlColumns, $sqlTuples ] = $this->platform->makeInsertLists( $rows ); // https://sqlite.org/lang_insert.html // Note that any auto-increment columns on conflicting rows will be reassigned // due to combined DELETE+INSERT semantics. This will be reflected in insertId(). $query = new Query( "REPLACE INTO $encTable ($sqlColumns) VALUES $sqlTuples", self::QUERY_CHANGE_ROWS, 'REPLACE', $table ); $this->query( $query, $fname ); } protected function isConnectionError( $errno ) { return $errno == 17; // SQLITE_SCHEMA; } protected function isKnownStatementRollbackError( $errno ) { // ON CONFLICT ROLLBACK clauses make it so that SQLITE_CONSTRAINT error is // ambiguous with regard to whether it implies a ROLLBACK or an ABORT happened. // https://sqlite.org/lang_createtable.html#uniqueconst // https://sqlite.org/lang_conflict.html return false; } public function serverIsReadOnly() { $this->assertHasConnectionHandle(); $path = $this->getDbFilePath(); return ( !self::isProcessMemoryPath( $path ) && !is_writable( $path ) ); } /** * @return string Wikitext of a link to the server software's web site */ public function getSoftwareLink() { return "[{{int:version-db-sqlite-url}} SQLite]"; } /** * @return string Version information from the database */ public function getServerVersion() { if ( $this->version === null ) { $this->version = $this->getBindingHandle()->getAttribute( PDO::ATTR_SERVER_VERSION ); } return $this->version; } /** * Get information about a given field * Returns false if the field does not exist. * * @param string $table * @param string $field * @return SQLiteField|false False on failure */ public function fieldInfo( $table, $field ) { $components = $this->platform->qualifiedTableComponents( $table ); $tableRaw = end( $components ); $query = new Query( 'PRAGMA table_info(' . $this->addQuotes( $tableRaw ) . ')', self::QUERY_IGNORE_DBO_TRX | self::QUERY_CHANGE_NONE, 'PRAGMA' ); $res = $this->query( $query, __METHOD__ ); foreach ( $res as $row ) { if ( $row->name == $field ) { return new SQLiteField( $row, $tableRaw ); } } return false; } protected function doBegin( $fname = '' ) { if ( $this->trxMode != '' ) { $sql = "BEGIN {$this->trxMode}"; } else { $sql = 'BEGIN'; } $query = new Query( $sql, self::QUERY_CHANGE_TRX, 'BEGIN' ); $this->query( $query, $fname ); } /** * @param string $s * @return string */ public function strencode( $s ) { return substr( $this->addQuotes( $s ), 1, -1 ); } /** * @param string $b * @return Blob */ public function encodeBlob( $b ) { return new Blob( $b ); } /** * @param Blob|string $b * @return string */ public function decodeBlob( $b ) { if ( $b instanceof Blob ) { $b = $b->fetch(); } if ( $b === null ) { // An empty blob is decoded as null in PHP before PHP 8.1. // It was probably fixed as a side-effect of caa710037e663fd78f67533b29611183090068b2 $b = ''; } return $b; } public function addQuotes( $s ) { if ( $s instanceof RawSQLValue ) { return $s->toSql(); } if ( $s instanceof Blob ) { return "x'" . bin2hex( $s->fetch() ) . "'"; } elseif ( is_bool( $s ) ) { return (string)(int)$s; } elseif ( is_int( $s ) ) { return (string)$s; } elseif ( strpos( (string)$s, "\0" ) !== false ) { // SQLite doesn't support \0 in strings, so use the hex representation as a workaround. // This is a known limitation of SQLite's mprintf function which PDO // should work around, but doesn't. I have reported this to php.net as bug #63419: // https://bugs.php.net/bug.php?id=63419 // There was already a similar report for SQLite3::escapeString, bug #62361: // https://bugs.php.net/bug.php?id=62361 // There is an additional bug regarding sorting this data after insert // on older versions of sqlite shipped with ubuntu 12.04 // https://phabricator.wikimedia.org/T74367 $this->logger->debug( __FUNCTION__ . ': Quoting value containing null byte. ' . 'For consistency all binary data should have been ' . 'first processed with self::encodeBlob()' ); return "x'" . bin2hex( (string)$s ) . "'"; } else { return $this->getBindingHandle()->quote( (string)$s ); } } public function doLockIsFree( string $lockName, string $method ) { // Only locks by this thread will be checked return true; } public function doLock( string $lockName, string $method, int $timeout ) { $status = $this->lockMgr->lock( [ $lockName ], LockManager::LOCK_EX, $timeout ); if ( $this->lockMgr instanceof FSLockManager && $status->hasMessage( 'lockmanager-fail-openlock' ) ) { throw new DBError( $this, "Cannot create directory \"{$this->getLockFileDirectory()}\"" ); } return $status->isOK() ? microtime( true ) : null; } public function doUnlock( string $lockName, string $method ) { return $this->lockMgr->unlock( [ $lockName ], LockManager::LOCK_EX )->isGood(); } /** * @param string $oldName * @param string $newName * @param bool $temporary * @param string $fname * @return bool|IResultWrapper * @throws RuntimeException */ public function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = __METHOD__ ) { $query = new Query( "SELECT sql FROM sqlite_master WHERE tbl_name=" . $this->addQuotes( $oldName ) . " AND type='table'", self::QUERY_IGNORE_DBO_TRX | self::QUERY_CHANGE_NONE, 'SELECT' ); $res = $this->query( $query, $fname ); $obj = $res->fetchObject(); if ( !$obj ) { throw new RuntimeException( "Couldn't retrieve structure for table $oldName" ); } $sqlCreateTable = $obj->sql; $sqlCreateTable = preg_replace( '/(?<=\W)"?' . preg_quote( trim( $this->platform->addIdentifierQuotes( $oldName ), '"' ), '/' ) . '"?(?=\W)/', $this->platform->addIdentifierQuotes( $newName ), $sqlCreateTable, 1 ); $flags = self::QUERY_CHANGE_SCHEMA | self::QUERY_PSEUDO_PERMANENT; if ( $temporary ) { if ( preg_match( '/^\\s*CREATE\\s+VIRTUAL\\s+TABLE\b/i', $sqlCreateTable ) ) { $this->logger->debug( "Table $oldName is virtual, can't create a temporary duplicate." ); } else { $sqlCreateTable = str_replace( 'CREATE TABLE', 'CREATE TEMPORARY TABLE', $sqlCreateTable ); } } $query = new Query( $sqlCreateTable, $flags, $temporary ? 'CREATE TEMPORARY' : 'CREATE', // Use a dot to avoid double-prefixing in Database::getTempTableWrites() '.' . $newName ); $res = $this->query( $query, $fname ); $query = new Query( 'PRAGMA INDEX_LIST(' . $this->addQuotes( $oldName ) . ')', self::QUERY_IGNORE_DBO_TRX | self::QUERY_CHANGE_NONE, 'PRAGMA' ); // Take over indexes $indexList = $this->query( $query, $fname ); foreach ( $indexList as $index ) { if ( strpos( $index->name, 'sqlite_autoindex' ) === 0 ) { continue; } if ( $index->unique ) { $sqlIndex = 'CREATE UNIQUE INDEX'; } else { $sqlIndex = 'CREATE INDEX'; } // Try to come up with a new index name, given indexes have database scope in SQLite $indexName = $newName . '_' . $index->name; $sqlIndex .= ' ' . $this->platform->addIdentifierQuotes( $indexName ) . ' ON ' . $this->platform->addIdentifierQuotes( $newName ); $query = new Query( 'PRAGMA INDEX_INFO(' . $this->addQuotes( $index->name ) . ')', self::QUERY_IGNORE_DBO_TRX | self::QUERY_CHANGE_NONE, 'PRAGMA' ); $indexInfo = $this->query( $query, $fname ); $fields = []; foreach ( $indexInfo as $indexInfoRow ) { $fields[$indexInfoRow->seqno] = $this->addQuotes( $indexInfoRow->name ); } $sqlIndex .= '(' . implode( ',', $fields ) . ')'; $query = new Query( $sqlIndex, self::QUERY_CHANGE_SCHEMA | self::QUERY_PSEUDO_PERMANENT, 'CREATE', $newName ); $this->query( $query, __METHOD__ ); } return $res; } /** * List all tables on the database * * @param string|null $prefix Only show tables with this prefix, e.g. mw_ * @param string $fname Calling function name * * @return array */ public function listTables( $prefix = null, $fname = __METHOD__ ) { $query = new Query( "SELECT name FROM sqlite_master WHERE type = 'table'", self::QUERY_IGNORE_DBO_TRX | self::QUERY_CHANGE_NONE, 'SELECT' ); $result = $this->query( $query, $fname ); $endArray = []; foreach ( $result as $table ) { $vars = get_object_vars( $table ); $table = array_pop( $vars ); if ( !$prefix || strpos( $table, $prefix ) === 0 ) { if ( strpos( $table, 'sqlite_' ) !== 0 ) { $endArray[] = $table; } } } return $endArray; } public function truncateTable( $table, $fname = __METHOD__ ) { $this->startAtomic( $fname ); // Use "truncate" optimization; https://www.sqlite.org/lang_delete.html $query = new Query( "DELETE FROM " . $this->tableName( $table ), self::QUERY_CHANGE_SCHEMA, 'DELETE', $table ); $this->query( $query, $fname ); $encMasterTable = $this->platform->addIdentifierQuotes( 'sqlite_sequence' ); $encSequenceName = $this->addQuotes( $this->tableName( $table, 'raw' ) ); $query = new Query( "DELETE FROM $encMasterTable WHERE name = $encSequenceName", self::QUERY_CHANGE_SCHEMA, 'DELETE', 'sqlite_sequence' ); $this->query( $query, $fname ); $this->endAtomic( $fname ); } public function setTableAliases( array $aliases ) { parent::setTableAliases( $aliases ); if ( $this->isOpen() ) { $this->attachDatabasesFromTableAliases(); } } /** * Issue ATTATCH statements for all unattached foreign DBs in table aliases */ private function attachDatabasesFromTableAliases() { foreach ( $this->platform->getTableAliases() as $params ) { if ( $params['dbname'] !== $this->getDBname() && !isset( $this->sessionAttachedDbs[$params['dbname']] ) ) { $this->attachDatabase( $params['dbname'], false, __METHOD__ ); $this->sessionAttachedDbs[$params['dbname']] = true; } } } public function databasesAreIndependent() { return true; } protected function doHandleSessionLossPreconnect() { $this->sessionAttachedDbs = []; // Release all locks, via FSLockManager::__destruct, as the base class expects; $this->lockMgr = null; // Create a new lock manager instance $this->lockMgr = $this->makeLockManager(); } protected function doFlushSession( $fname ) { // Release all locks, via FSLockManager::__destruct, as the base class expects $this->lockMgr = null; // Create a new lock manager instance $this->lockMgr = $this->makeLockManager(); } /** * @return PDO */ protected function getBindingHandle() { return parent::getBindingHandle(); } protected function getInsertIdColumnForUpsert( $table ) { $components = $this->platform->qualifiedTableComponents( $table ); $tableRaw = end( $components ); $query = new Query( 'PRAGMA table_info(' . $this->addQuotes( $tableRaw ) . ')', self::QUERY_IGNORE_DBO_TRX | self::QUERY_CHANGE_NONE, 'PRAGMA' ); $res = $this->query( $query, __METHOD__ ); foreach ( $res as $row ) { if ( $row->pk && strtolower( $row->type ) === 'integer' ) { return $row->name; } } return null; } }
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