X-Git-Url: https://scripts.mit.edu/gitweb/autoinstallsdev/mediawiki.git/blobdiff_plain/19e297c21b10b1b8a3acad5e73fc71dcb35db44a..6932310fd58ebef145fa01eb76edf7150284d8ea:/includes/db/DatabaseSqlite.php

diff --git a/includes/db/DatabaseSqlite.php b/includes/db/DatabaseSqlite.php
deleted file mode 100644
index 503ebdf6..00000000
--- a/includes/db/DatabaseSqlite.php
+++ /dev/null
@@ -1,667 +0,0 @@
-<?php
-/**
- * This is the SQLite database abstraction layer.
- * See maintenance/sqlite/README for development notes and other specific information
- *
- * @file
- * @ingroup Database
- */
-
-/**
- * @ingroup Database
- */
-class DatabaseSqlite extends DatabaseBase {
-
-	private static $fulltextEnabled = null;
-
-	var $mAffectedRows;
-	var $mLastResult;
-	var $mDatabaseFile;
-	var $mName;
-
-	/**
-	 * Constructor.
-	 * Parameters $server, $user and $password are not used.
-	 */
-	function __construct( $server = false, $user = false, $password = false, $dbName = false, $flags = 0 ) {
-		$this->mName = $dbName;
-		parent::__construct( $server, $user, $password, $dbName, $flags );
-		// parent doesn't open when $user is false, but we can work with $dbName
-		if( !$user && $dbName ) {
-			global $wgSharedDB;
-			if( $this->open( $server, $user, $password, $dbName ) && $wgSharedDB ) {
-				$this->attachDatabase( $wgSharedDB );
-			}
-		}
-	}
-
-	function getType() {
-		return 'sqlite';
-	}
-
-	/**
-	 * @todo: check if it should be true like parent class
-	 */
-	function implicitGroupby()   { return false; }
-
-	static function newFromParams( $server, $user, $password, $dbName, $flags = 0 ) {
-		return new DatabaseSqlite( $server, $user, $password, $dbName, $flags );
-	}
-
-	/** Open an SQLite database and return a resource handle to it
-	 *  NOTE: only $dbName is used, the other parameters are irrelevant for SQLite databases
-	 */
-	function open( $server, $user, $pass, $dbName ) {
-		global $wgSQLiteDataDir;
-
-		$fileName = self::generateFileName( $wgSQLiteDataDir, $dbName );
-		if ( !is_readable( $fileName ) ) {
-			$this->mConn = false;
-			throw new DBConnectionError( $this, "SQLite database not accessible" );
-		}
-		$this->openFile( $fileName );
-		return $this->mConn;
-	}
-
-	/**
-	 * Opens a database file
-	 * @return SQL connection or false if failed
-	 */
-	function openFile( $fileName ) {
-		$this->mDatabaseFile = $fileName;
-		try {
-			if ( $this->mFlags & DBO_PERSISTENT ) {
-				$this->mConn = new PDO( "sqlite:$fileName", '', '',
-					array( PDO::ATTR_PERSISTENT => true ) );
-			} else {
-				$this->mConn = new PDO( "sqlite:$fileName", '', '' );
-			}
-		} catch ( PDOException $e ) {
-			$err = $e->getMessage();
-		}
-		if ( !$this->mConn ) {
-			wfDebug( "DB connection error: $err\n" );
-			throw new DBConnectionError( $this, $err );
-		}
-		$this->mOpened = !!$this->mConn;
-		# set error codes only, don't raise exceptions
-		if ( $this->mOpened ) {
-			$this->mConn->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_SILENT );
-			return true;
-		}
-	}
-
-	/**
-	 * Close an SQLite database
-	 */
-	function close() {
-		$this->mOpened = false;
-		if ( is_object( $this->mConn ) ) {
-			if ( $this->trxLevel() ) $this->commit();
-			$this->mConn = null;
-		}
-		return true;
-	}
-
-	/**
-	 * Generates a database file name. Explicitly public for installer.
-	 * @param $dir String: Directory where database resides
-	 * @param $dbName String: Database name
-	 * @return String
-	 */
-	public static function generateFileName( $dir, $dbName ) {
-		return "$dir/$dbName.sqlite";
-	}
-
-	/**
-	 * Check if the searchindext table is FTS enabled.
-	 * @returns false if not enabled.
-	 */
-	function checkForEnabledSearch() {
-		if ( self::$fulltextEnabled === null ) {
-			self::$fulltextEnabled = false;
-			$table = $this->tableName( 'searchindex' );
-			$res = $this->query( "SELECT sql FROM sqlite_master WHERE tbl_name = '$table'", __METHOD__ );
-			if ( $res ) {
-				$row = $res->fetchRow();
-				self::$fulltextEnabled = stristr($row['sql'], 'fts' ) !== false;
-			}
-		}
-		return self::$fulltextEnabled;
-	}
-
-	/**
-	 * Returns version of currently supported SQLite fulltext search module or false if none present.
-	 * @return String
-	 */
-	static function getFulltextSearchModule() {
-		static $cachedResult = null;
-		if ( $cachedResult !== null ) {
-			return $cachedResult;
-		}
-		$cachedResult = false;
-		$table = 'dummy_search_test';
-		
-		$db = new DatabaseSqliteStandalone( ':memory:' );
-
-		if ( $db->query( "CREATE VIRTUAL TABLE $table USING FTS3(dummy_field)", __METHOD__, true ) ) {
-			$cachedResult = 'FTS3';
-		}
-		$db->close();
-		return $cachedResult;
-	}
-
-	/**
-	 * Attaches external database to our connection, see http://sqlite.org/lang_attach.html
-	 * for details.
-	 * @param $name String: database name to be used in queries like SELECT foo FROM dbname.table
-	 * @param $file String: database file name. If omitted, will be generated using $name and $wgSQLiteDataDir
-	 * @param $fname String: calling function name
-	 */
-	function attachDatabase( $name, $file = false, $fname = 'DatabaseSqlite::attachDatabase' ) {
-		global $wgSQLiteDataDir;
-		if ( !$file ) {
-			$file = self::generateFileName( $wgSQLiteDataDir, $name );
-		}
-		$file = $this->addQuotes( $file );
-		return $this->query( "ATTACH DATABASE $file AS $name", $fname );
-	}
-
-	/**
-	 * @see DatabaseBase::isWriteQuery()
-	 */
-	function isWriteQuery( $sql ) {
-		return parent::isWriteQuery( $sql ) && !preg_match( '/^ATTACH\b/i', $sql );
-	}
-
-	/**
-	 * SQLite doesn't allow buffered results or data seeking etc, so we'll use fetchAll as the result
-	 */
-	function doQuery( $sql ) {
-		$res = $this->mConn->query( $sql );
-		if ( $res === false ) {
-			return false;
-		} else {
-			$r = $res instanceof ResultWrapper ? $res->result : $res;
-			$this->mAffectedRows = $r->rowCount();
-			$res = new ResultWrapper( $this, $r->fetchAll() );
-		}
-		return $res;
-	}
-
-	function freeResult( $res ) {
-		if ( $res instanceof ResultWrapper ) {
-			$res->result = null;
-		} else {
-			$res = null;
-		}
-	}
-
-	function fetchObject( $res ) {
-		if ( $res instanceof ResultWrapper ) {
-			$r =& $res->result;
-		} else {
-			$r =& $res;
-		}
-
-		$cur = current( $r );
-		if ( is_array( $cur ) ) {
-			next( $r );
-			$obj = new stdClass;
-			foreach ( $cur as $k => $v ) {
-				if ( !is_numeric( $k ) ) {
-					$obj->$k = $v;
-				}
-			}
-
-			return $obj;
-		}
-		return false;
-	}
-
-	function fetchRow( $res ) {
-		if ( $res instanceof ResultWrapper ) {
-			$r =& $res->result;
-		} else {
-			$r =& $res;
-		}
-		$cur = current( $r );
-		if ( is_array( $cur ) ) {
-			next( $r );
-			return $cur;
-		}
-		return false;
-	}
-
-	/**
-	 * The PDO::Statement class implements the array interface so count() will work
-	 */
-	function numRows( $res ) {
-		$r = $res instanceof ResultWrapper ? $res->result : $res;
-		return count( $r );
-	}
-
-	function numFields( $res ) {
-		$r = $res instanceof ResultWrapper ? $res->result : $res;
-		return is_array( $r ) ? count( $r[0] ) : 0;
-	}
-
-	function fieldName( $res, $n ) {
-		$r = $res instanceof ResultWrapper ? $res->result : $res;
-		if ( is_array( $r ) ) {
-			$keys = array_keys( $r[0] );
-			return $keys[$n];
-		}
-		return  false;
-	}
-
-	/**
-	 * Use MySQL's naming (accounts for prefix etc) but remove surrounding backticks
-	 */
-	function tableName( $name ) {
-		// table names starting with sqlite_ are reserved
-		if ( strpos( $name, 'sqlite_' ) === 0 ) return $name;
-		return str_replace( '`', '', parent::tableName( $name ) );
-	}
-
-	/**
-	 * Index names have DB scope
-	 */
-	function indexName( $index ) {
-		return $index;
-	}
-
-	/**
-	 * This must be called after nextSequenceVal
-	 */
-	function insertId() {
-		return $this->mConn->lastInsertId();
-	}
-
-	function dataSeek( $res, $row ) {
-		if ( $res instanceof ResultWrapper ) {
-			$r =& $res->result;
-		} else {
-			$r =& $res;
-		}
-		reset( $r );
-		if ( $row > 0 ) {
-			for ( $i = 0; $i < $row; $i++ ) {
-				next( $r );
-			}
-		}
-	}
-
-	function lastError() {
-		if ( !is_object( $this->mConn ) ) {
-			return "Cannot return last error, no db connection";
-		}
-		$e = $this->mConn->errorInfo();
-		return isset( $e[2] ) ? $e[2] : '';
-	}
-
-	function lastErrno() {
-		if ( !is_object( $this->mConn ) ) {
-			return "Cannot return last error, no db connection";
-		} else {
-			$info = $this->mConn->errorInfo();
-			return $info[1];
-		}
-	}
-
-	function affectedRows() {
-		return $this->mAffectedRows;
-	}
-
-	/**
-	 * Returns information about an index
-	 * Returns false if the index does not exist
-	 * - if errors are explicitly ignored, returns NULL on failure
-	 */
-	function indexInfo( $table, $index, $fname = 'DatabaseSqlite::indexExists' ) {
-		$sql = 'PRAGMA index_info(' . $this->addQuotes( $this->indexName( $index ) ) . ')';
-		$res = $this->query( $sql, $fname );
-		if ( !$res ) {
-			return null;
-		}
-		if ( $res->numRows() == 0 ) {
-			return false;
-		}
-		$info = array();
-		foreach ( $res as $row ) {
-			$info[] = $row->name;
-		}
-		return $info;
-	}
-
-	function indexUnique( $table, $index, $fname = 'DatabaseSqlite::indexUnique' ) {
-		$row = $this->selectRow( 'sqlite_master', '*',
-			array(
-				'type' => 'index',
-				'name' => $this->indexName( $index ),
-			), $fname );
-		if ( !$row || !isset( $row->sql ) ) {
-			return null;
-		}
-
-		// $row->sql will be of the form CREATE [UNIQUE] INDEX ...
-		$indexPos = strpos( $row->sql, 'INDEX' );
-		if ( $indexPos === false ) {
-			return null;
-		}
-		$firstPart = substr( $row->sql, 0, $indexPos );
-		$options = explode( ' ', $firstPart );
-		return in_array( 'UNIQUE', $options );
-	}
-
-	/**
-	 * Filter the options used in SELECT statements
-	 */
-	function makeSelectOptions( $options ) {
-		foreach ( $options as $k => $v ) {
-			if ( is_numeric( $k ) && $v == 'FOR UPDATE' ) {
-				$options[$k] = '';
-			}
-		}
-		return parent::makeSelectOptions( $options );
-	}
-
-	/**
-	 * Based on generic method (parent) with some prior SQLite-sepcific adjustments
-	 */
-	function insert( $table, $a, $fname = 'DatabaseSqlite::insert', $options = array() ) {
-		if ( !count( $a ) ) {
-			return true;
-		}
-		if ( !is_array( $options ) ) {
-			$options = array( $options );
-		}
-
-		# SQLite uses OR IGNORE not just IGNORE
-		foreach ( $options as $k => $v ) {
-			if ( $v == 'IGNORE' ) {
-				$options[$k] = 'OR IGNORE';
-			}
-		}
-
-		# SQLite can't handle multi-row inserts, so divide up into multiple single-row inserts
-		if ( isset( $a[0] ) && is_array( $a[0] ) ) {
-			$ret = true;
-			foreach ( $a as $v ) {
-				if ( !parent::insert( $table, $v, "$fname/multi-row", $options ) ) {
-					$ret = false;
-				}
-			}
-		} else {
-			$ret = parent::insert( $table, $a, "$fname/single-row", $options );
-		}
-
-		return $ret;
-	}
-
-	function replace( $table, $uniqueIndexes, $rows, $fname = 'DatabaseSqlite::replace' ) {
-		if ( !count( $rows ) ) return true;
-
-		# SQLite can't handle multi-row replaces, so divide up into multiple single-row queries
-		if ( isset( $rows[0] ) && is_array( $rows[0] ) ) {
-			$ret = true;
-			foreach ( $rows as $v ) {
-				if ( !parent::replace( $table, $uniqueIndexes, $v, "$fname/multi-row" ) ) {
-					$ret = false;
-				}
-			}
-		} else {
-			$ret = parent::replace( $table, $uniqueIndexes, $rows, "$fname/single-row" );
-		}
-
-		return $ret;
-	}
-
-	/**
-	 * Returns the size of a text field, or -1 for "unlimited"
-	 * In SQLite this is SQLITE_MAX_LENGTH, by default 1GB. No way to query it though.
-	 */
-	function textFieldSize( $table, $field ) {
-		return - 1;
-	}
-
-	function unionSupportsOrderAndLimit() {
-		return false;
-	}
-
-	function unionQueries( $sqls, $all ) {
-		$glue = $all ? ' UNION ALL ' : ' UNION ';
-		return implode( $glue, $sqls );
-	}
-
-	public function unixTimestamp( $field ) {
-		return $field;
-	}
-
-	function wasDeadlock() {
-		return $this->lastErrno() == 5; // SQLITE_BUSY
-	}
-
-	function wasErrorReissuable() {
-		return $this->lastErrno() ==  17; // SQLITE_SCHEMA;
-	}
-
-	function wasReadOnlyError() {
-		return $this->lastErrno() == 8; // SQLITE_READONLY;
-	}
-
-	/**
-	 * @return string wikitext of a link to the server software's web site
-	 */
-	public static function getSoftwareLink() {
-		return "[http://sqlite.org/ SQLite]";
-	}
-
-	/**
-	 * @return string Version information from the database
-	 */
-	function getServerVersion() {
-		$ver = $this->mConn->getAttribute( PDO::ATTR_SERVER_VERSION );
-		return $ver;
-	}
-
-	/**
-	 * @return string User-friendly database information
-	 */
-	public function getServerInfo() {
-		return wfMsg( self::getFulltextSearchModule() ? 'sqlite-has-fts' : 'sqlite-no-fts', $this->getServerVersion() );
-	}
-
-	/**
-	 * Get information about a given field
-	 * Returns false if the field does not exist.
-	 */
-	function fieldInfo( $table, $field ) {
-		$tableName = $this->tableName( $table );
-		$sql = 'PRAGMA table_info(' . $this->addQuotes( $tableName ) . ')';
-		$res = $this->query( $sql, __METHOD__ );
-		foreach ( $res as $row ) {
-			if ( $row->name == $field ) {
-				return new SQLiteField( $row, $tableName );
-			}
-		}
-		return false;
-	}
-
-	function begin( $fname = '' ) {
-		if ( $this->mTrxLevel == 1 ) $this->commit();
-		$this->mConn->beginTransaction();
-		$this->mTrxLevel = 1;
-	}
-
-	function commit( $fname = '' ) {
-		if ( $this->mTrxLevel == 0 ) return;
-		$this->mConn->commit();
-		$this->mTrxLevel = 0;
-	}
-
-	function rollback( $fname = '' ) {
-		if ( $this->mTrxLevel == 0 ) return;
-		$this->mConn->rollBack();
-		$this->mTrxLevel = 0;
-	}
-
-	function limitResultForUpdate( $sql, $num ) {
-		return $this->limitResult( $sql, $num );
-	}
-
-	function strencode( $s ) {
-		return substr( $this->addQuotes( $s ), 1, - 1 );
-	}
-
-	function encodeBlob( $b ) {
-		return new Blob( $b );
-	}
-
-	function decodeBlob( $b ) {
-		if ( $b instanceof Blob ) {
-			$b = $b->fetch();
-		}
-		return $b;
-	}
-
-	function addQuotes( $s ) {
-		if ( $s instanceof Blob ) {
-			return "x'" . bin2hex( $s->fetch() ) . "'";
-		} else {
-			return $this->mConn->quote( $s );
-		}
-	}
-
-	function buildLike() {
-		$params = func_get_args();
-		if ( count( $params ) > 0 && is_array( $params[0] ) ) {
-			$params = $params[0];
-		}
-		return parent::buildLike( $params ) . "ESCAPE '\' ";
-	}
-
-	public function getSearchEngine() {
-		return "SearchSqlite";
-	}
-
-	/**
-	 * No-op version of deadlockLoop
-	 */
-	public function deadlockLoop( /*...*/ ) {
-		$args = func_get_args();
-		$function = array_shift( $args );
-		return call_user_func_array( $function, $args );
-	}
-
-	protected function replaceVars( $s ) {
-		$s = parent::replaceVars( $s );
-		if ( preg_match( '/^\s*(CREATE|ALTER) TABLE/i', $s ) ) {
-			// CREATE TABLE hacks to allow schema file sharing with MySQL
-
-			// binary/varbinary column type -> blob
-			$s = preg_replace( '/\b(var)?binary(\(\d+\))/i', 'BLOB', $s );
-			// no such thing as unsigned
-			$s = preg_replace( '/\b(un)?signed\b/i', '', $s );
-			// INT -> INTEGER
-			$s = preg_replace( '/\b(tiny|small|medium|big|)int(\s*\(\s*\d+\s*\)|\b)/i', 'INTEGER', $s );
-			// floating point types -> REAL
-			$s = preg_replace( '/\b(float|double(\s+precision)?)(\s*\(\s*\d+\s*(,\s*\d+\s*)?\)|\b)/i', 'REAL', $s );
-			// varchar -> TEXT
-			$s = preg_replace( '/\b(var)?char\s*\(.*?\)/i', 'TEXT', $s );
-			// TEXT normalization
-			$s = preg_replace( '/\b(tiny|medium|long)text\b/i', 'TEXT', $s );
-			// BLOB normalization
-			$s = preg_replace( '/\b(tiny|small|medium|long|)blob\b/i', 'BLOB', $s );
-			// BOOL -> INTEGER
-			$s = preg_replace( '/\bbool(ean)?\b/i', 'INTEGER', $s );
-			// DATETIME -> TEXT
-			$s = preg_replace( '/\b(datetime|timestamp)\b/i', 'TEXT', $s );
-			// No ENUM type
-			$s = preg_replace( '/\benum\s*\([^)]*\)/i', 'TEXT', $s );
-			// binary collation type -> nothing
-			$s = preg_replace( '/\bbinary\b/i', '', $s );
-			// auto_increment -> autoincrement
-			$s = preg_replace( '/\bauto_increment\b/i', 'AUTOINCREMENT', $s );
-			// No explicit options
-			$s = preg_replace( '/\)[^);]*(;?)\s*$/', ')\1', $s );
-			// AUTOINCREMENT should immedidately follow PRIMARY KEY
-			$s = preg_replace( '/primary key (.*?) autoincrement/i', 'PRIMARY KEY AUTOINCREMENT $1', $s );
-		} elseif ( preg_match( '/^\s*CREATE (\s*(?:UNIQUE|FULLTEXT)\s+)?INDEX/i', $s ) ) {
-			// No truncated indexes
-			$s = preg_replace( '/\(\d+\)/', '', $s );
-			// No FULLTEXT
-			$s = preg_replace( '/\bfulltext\b/i', '', $s );
-		}
-		return $s;
-	}
-
-	/*
-	 * Build a concatenation list to feed into a SQL query
-	 */
-	function buildConcat( $stringList ) {
-		return '(' . implode( ') || (', $stringList ) . ')';
-	}
-
-	function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseSqlite::duplicateTableStructure' ) {
-		$res = $this->query( "SELECT sql FROM sqlite_master WHERE tbl_name='$oldName' AND type='table'", $fname );
-		$obj = $this->fetchObject( $res );
-		if ( !$obj ) {
-			throw new MWException( "Couldn't retrieve structure for table $oldName" );
-		}
-		$sql = $obj->sql;
-		$sql = preg_replace( '/\b' . preg_quote( $oldName ) . '\b/', $newName, $sql, 1 );
-		return $this->query( $sql, $fname );
-	}
-
-} // end DatabaseSqlite class
-
-/**
- * This class allows simple acccess to a SQLite database independently from main database settings
- * @ingroup Database
- */
-class DatabaseSqliteStandalone extends DatabaseSqlite {
-	public function __construct( $fileName, $flags = 0 ) {
-		$this->mFlags = $flags;
-		$this->tablePrefix( null );
-		$this->openFile( $fileName );
-	}
-}
-
-/**
- * @ingroup Database
- */
-class SQLiteField implements Field {
-	private $info, $tableName;
-	function __construct( $info, $tableName ) {
-		$this->info = $info;
-		$this->tableName = $tableName;
-	}
-
-	function name() {
-		return $this->info->name;
-	}
-
-	function tableName() {
-		return $this->tableName;
-	}
-
-	function defaultValue() {
-		if ( is_string( $this->info->dflt_value ) ) {
-			// Typically quoted
-			if ( preg_match( '/^\'(.*)\'$', $this->info->dflt_value ) ) {
-				return str_replace( "''", "'", $this->info->dflt_value );
-			}
-		}
-		return $this->info->dflt_value;
-	}
-
-	function isNullable() {
-		return !$this->info->notnull;
-	}
-
-	function type() {
-		return $this->info->type;
-	}
-
-} // end SQLiteField