<?php
/**
- * This script is the SQLite database abstraction layer
- *
+ * This is the SQLite database abstraction layer.
* See maintenance/sqlite/README for development notes and other specific information
- * @ingroup Database
+ *
* @file
+ * @ingroup Database
*/
/**
*/
class DatabaseSqlite extends DatabaseBase {
+ private static $fulltextEnabled = null;
+
var $mAffectedRows;
var $mLastResult;
var $mDatabaseFile;
var $mName;
/**
- * Constructor
+ * @var PDO
*/
- function __construct( $server = false, $user = false, $password = false, $dbName = false, $failFunction = false, $flags = 0 ) {
- global $wgSQLiteDataDir;
- $this->mFailFunction = $failFunction;
- $this->mFlags = $flags;
- $this->mDatabaseFile = self::generateFileName( $wgSQLiteDataDir, $dbName );
- if( !is_readable( $this->mDatabaseFile ) )
- throw new DBConnectionError( $this, "SQLite database not accessible" );
+ protected $mConn;
+
+ /**
+ * Constructor.
+ * Parameters $server, $user and $password are not used.
+ * @param $server string
+ * @param $user string
+ * @param $password string
+ * @param $dbName string
+ * @param $flags int
+ */
+ function __construct( $server = false, $user = false, $password = false, $dbName = false, $flags = 0 ) {
$this->mName = $dbName;
- $this->open( $server, $user, $password, $dbName );
+ parent::__construct( $server, $user, $password, $dbName, $flags );
+ // parent doesn't open when $user is false, but we can work with $dbName
+ if( $dbName ) {
+ global $wgSharedDB;
+ if( $this->open( $server, $user, $password, $dbName ) && $wgSharedDB ) {
+ $this->attachDatabase( $wgSharedDB );
+ }
+ }
}
/**
- * todo: check if these should be true like parent class
+ * @return string
*/
- function implicitGroupby() { return false; }
- function implicitOrderby() { return false; }
+ function getType() {
+ return 'sqlite';
+ }
- static function newFromParams( $server, $user, $password, $dbName, $failFunction = false, $flags = 0 ) {
- return new DatabaseSqlite( $server, $user, $password, $dbName, $failFunction, $flags );
+ /**
+ * @todo: check if it should be true like parent class
+ *
+ * @return bool
+ */
+ function implicitGroupby() {
+ return false;
}
/** Open an SQLite database and return a resource handle to it
* NOTE: only $dbName is used, the other parameters are irrelevant for SQLite databases
+ *
+ * @param $server
+ * @param $user
+ * @param $pass
+ * @param $dbName
+ *
+ * @return PDO
*/
function open( $server, $user, $pass, $dbName ) {
- $this->mConn = false;
- if ( $dbName ) {
- $file = $this->mDatabaseFile;
- try {
- if ( $this->mFlags & DBO_PERSISTENT ) {
- $this->mConn = new PDO( "sqlite:$file", $user, $pass,
- array( PDO::ATTR_PERSISTENT => true ) );
- } else {
- $this->mConn = new PDO( "sqlite:$file", $user, $pass );
- }
- } catch ( PDOException $e ) {
- $err = $e->getMessage();
- }
- if ( $this->mConn === false ) {
- wfDebug( "DB connection error: $err\n" );
- if ( !$this->mFailFunction ) {
- throw new DBConnectionError( $this, $err );
- } else {
- return false;
- }
+ global $wgSQLiteDataDir;
- }
- $this->mOpened = $this->mConn;
- # set error codes only, don't raise exceptions
- $this->mConn->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_SILENT );
+ $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;
}
/**
- * Close an SQLite database
+ * Opens a database file
+ *
+ * @param $fileName string
+ *
+ * @return PDO|bool SQL connection or false if failed
*/
- function close() {
- $this->mOpened = false;
- if ( is_object( $this->mConn ) ) {
- if ( $this->trxLevel() ) $this->immediateCommit();
- $this->mConn = null;
+ 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;
+ }
+ }
+
+ /**
+ * Does not actually close the connection, just destroys the reference for GC to do its work
+ * @return bool
+ */
+ protected function closeConnection() {
+ $this->mConn = null;
return true;
}
return "$dir/$dbName.sqlite";
}
+ /**
+ * Check if the searchindext table is FTS enabled.
+ * @return bool False if not enabled.
+ */
+ function checkForEnabledSearch() {
+ if ( self::$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
+ *
+ * @return ResultWrapper
+ */
+ 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()
+ *
+ * @param $sql string
+ *
+ * @return bool
+ */
+ 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
+ *
+ * @param $sql string
+ *
+ * @return ResultWrapper
*/
- function doQuery( $sql ) {
+ protected function doQuery( $sql ) {
$res = $this->mConn->query( $sql );
if ( $res === false ) {
return false;
return $res;
}
+ /**
+ * @param $res ResultWrapper
+ */
function freeResult( $res ) {
- if ( $res instanceof ResultWrapper )
- $res->result = NULL;
- else
- $res = NULL;
+ if ( $res instanceof ResultWrapper ) {
+ $res->result = null;
+ } else {
+ $res = null;
+ }
}
- function fetchObject($res) {
- if ($res instanceof ResultWrapper)
+ /**
+ * @param $res ResultWrapper
+ * @return
+ */
+ function fetchObject( $res ) {
+ if ( $res instanceof ResultWrapper ) {
$r =& $res->result;
- else
+ } else {
$r =& $res;
+ }
$cur = current( $r );
if ( is_array( $cur ) ) {
next( $r );
$obj = new stdClass;
- foreach ( $cur as $k => $v )
- if ( !is_numeric( $k ) )
+ foreach ( $cur as $k => $v ) {
+ if ( !is_numeric( $k ) ) {
$obj->$k = $v;
+ }
+ }
return $obj;
}
return false;
}
- function fetchRow($res) {
- if ( $res instanceof ResultWrapper )
+ /**
+ * @param $res ResultWrapper
+ * @return bool|mixed
+ */
+ function fetchRow( $res ) {
+ if ( $res instanceof ResultWrapper ) {
$r =& $res->result;
- else
+ } else {
$r =& $res;
-
- $cur = current($r);
- if (is_array($cur)) {
- next($r);
+ }
+ $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
+ *
+ * @param $res ResultWrapper
+ *
+ * @return int
*/
function numRows( $res ) {
$r = $res instanceof ResultWrapper ? $res->result : $res;
return count( $r );
}
+ /**
+ * @param $res ResultWrapper
+ * @return int
+ */
function numFields( $res ) {
$r = $res instanceof ResultWrapper ? $res->result : $res;
return is_array( $r ) ? count( $r[0] ) : 0;
}
+ /**
+ * @param $res ResultWrapper
+ * @param $n
+ * @return bool
+ */
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;
+ return false;
}
/**
* Use MySQL's naming (accounts for prefix etc) but remove surrounding backticks
+ *
+ * @param $name
+ * @param $format String
+ * @return string
*/
- function tableName( $name ) {
- return str_replace( '`', '', parent::tableName( $name ) );
+ function tableName( $name, $format = 'quoted' ) {
+ // table names starting with sqlite_ are reserved
+ if ( strpos( $name, 'sqlite_' ) === 0 ) {
+ return $name;
+ }
+ return str_replace( '"', '', parent::tableName( $name, $format ) );
}
/**
* Index names have DB scope
+ *
+ * @param $index string
+ *
+ * @return string
*/
function indexName( $index ) {
return $index;
/**
* This must be called after nextSequenceVal
+ *
+ * @return int
*/
function insertId() {
return $this->mConn->lastInsertId();
}
+ /**
+ * @param $res ResultWrapper
+ * @param $row
+ */
function dataSeek( $res, $row ) {
- if ( $res instanceof ResultWrapper )
+ if ( $res instanceof ResultWrapper ) {
$r =& $res->result;
- else
+ } else {
$r =& $res;
+ }
reset( $r );
- if ( $row > 0 )
- for ( $i = 0; $i < $row; $i++ )
+ if ( $row > 0 ) {
+ for ( $i = 0; $i < $row; $i++ ) {
next( $r );
+ }
+ }
}
+ /**
+ * @return string
+ */
function lastError() {
- if ( !is_object( $this->mConn ) )
+ if ( !is_object( $this->mConn ) ) {
return "Cannot return last error, no db connection";
+ }
$e = $this->mConn->errorInfo();
return isset( $e[2] ) ? $e[2] : '';
}
+ /**
+ * @return string
+ */
function lastErrno() {
if ( !is_object( $this->mConn ) ) {
return "Cannot return last error, no db connection";
}
}
+ /**
+ * @return int
+ */
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
+ *
+ * @return array
*/
function indexInfo( $table, $index, $fname = 'DatabaseSqlite::indexExists' ) {
$sql = 'PRAGMA index_info(' . $this->addQuotes( $this->indexName( $index ) ) . ')';
return $info;
}
+ /**
+ * @param $table
+ * @param $index
+ * @param $fname string
+ * @return bool|null
+ */
function indexUnique( $table, $index, $fname = 'DatabaseSqlite::indexUnique' ) {
$row = $this->selectRow( 'sqlite_master', '*',
array(
/**
* Filter the options used in SELECT statements
+ *
+ * @param $options array
+ *
+ * @return array
*/
function makeSelectOptions( $options ) {
- foreach ( $options as $k => $v )
- if ( is_numeric( $k ) && $v == 'FOR UPDATE' )
+ foreach ( $options as $k => $v ) {
+ if ( is_numeric( $k ) && $v == 'FOR UPDATE' ) {
$options[$k] = '';
+ }
+ }
return parent::makeSelectOptions( $options );
}
/**
- * Based on MySQL method (parent) with some prior SQLite-sepcific adjustments
+ * @param $options array
+ * @return string
*/
- function insert( $table, $a, $fname = 'DatabaseSqlite::insert', $options = array() ) {
- if ( !count( $a ) ) return true;
- if ( !is_array( $options ) ) $options = array( $options );
+ function makeUpdateOptions( $options ) {
+ $options = self::fixIgnore( $options );
+ return parent::makeUpdateOptions( $options );
+ }
+ /**
+ * @param $options array
+ * @return array
+ */
+ static function fixIgnore( $options ) {
# SQLite uses OR IGNORE not just IGNORE
- foreach ( $options as $k => $v )
- if ( $v == 'IGNORE' )
+ foreach ( $options as $k => $v ) {
+ if ( $v == 'IGNORE' ) {
$options[$k] = 'OR IGNORE';
+ }
+ }
+ return $options;
+ }
+
+ /**
+ * @param $options array
+ * @return string
+ */
+ function makeInsertOptions( $options ) {
+ $options = self::fixIgnore( $options );
+ return parent::makeInsertOptions( $options );
+ }
+
+ /**
+ * Based on generic method (parent) with some prior SQLite-sepcific adjustments
+ * @return bool
+ */
+ function insert( $table, $a, $fname = 'DatabaseSqlite::insert', $options = array() ) {
+ if ( !count( $a ) ) {
+ return true;
+ }
# 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 $k => $v )
- if ( !parent::insert( $table, $v, "$fname/multi-row", $options ) )
+ 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;
}
+ /**
+ * @param $table
+ * @param $uniqueIndexes
+ * @param $rows
+ * @param $fname string
+ * @return bool|ResultWrapper
+ */
+ 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 $v ) {
+ if ( !$this->nativeReplace( $table, $v, "$fname/multi-row" ) ) {
+ $ret = false;
+ }
+ }
+ } else {
+ $ret = $this->nativeReplace( $table, $rows, "$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.
+ *
+ * @return int
*/
function textFieldSize( $table, $field ) {
- return - 1;
+ return -1;
}
+ /**
+ * @return bool
+ */
function unionSupportsOrderAndLimit() {
return false;
}
+ /**
+ * @param $sqls
+ * @param $all
+ * @return string
+ */
function unionQueries( $sqls, $all ) {
$glue = $all ? ' UNION ALL ' : ' UNION ';
return implode( $glue, $sqls );
}
+ /**
+ * @return bool
+ */
function wasDeadlock() {
- return $this->lastErrno() == SQLITE_BUSY;
+ return $this->lastErrno() == 5; // SQLITE_BUSY
}
+ /**
+ * @return bool
+ */
function wasErrorReissuable() {
- return $this->lastErrno() == SQLITE_SCHEMA;
+ return $this->lastErrno() == 17; // SQLITE_SCHEMA;
}
+ /**
+ * @return bool
+ */
function wasReadOnlyError() {
- return $this->lastErrno() == SQLITE_READONLY;
+ return $this->lastErrno() == 8; // SQLITE_READONLY;
}
/**
* @return string wikitext of a link to the server software's web site
*/
- function getSoftwareLink() {
+ public static function getSoftwareLink() {
return "[http://sqlite.org/ SQLite]";
}
}
/**
- * Query whether a given column exists in the mediawiki schema
+ * @return string User-friendly database information
*/
- function fieldExists( $table, $field, $fname = '' ) {
- $info = $this->fieldInfo( $table, $field );
- return (bool)$info;
+ 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.
+ *
+ * @param $table string
+ * @param $field string
+ * @return SQLiteField|bool False on failure
*/
function fieldInfo( $table, $field ) {
$tableName = $this->tableName( $table );
}
function begin( $fname = '' ) {
- if ( $this->mTrxLevel == 1 ) $this->commit();
+ if ( $this->mTrxLevel == 1 ) {
+ $this->commit( __METHOD__ );
+ }
$this->mConn->beginTransaction();
$this->mTrxLevel = 1;
}
function commit( $fname = '' ) {
- if ( $this->mTrxLevel == 0 ) return;
+ if ( $this->mTrxLevel == 0 ) {
+ return;
+ }
$this->mConn->commit();
$this->mTrxLevel = 0;
}
function rollback( $fname = '' ) {
- if ( $this->mTrxLevel == 0 ) return;
+ if ( $this->mTrxLevel == 0 ) {
+ return;
+ }
$this->mConn->rollBack();
$this->mTrxLevel = 0;
}
+ /**
+ * @param $sql
+ * @param $num
+ * @return string
+ */
function limitResultForUpdate( $sql, $num ) {
return $this->limitResult( $sql, $num );
}
+ /**
+ * @param $s string
+ * @return string
+ */
function strencode( $s ) {
return substr( $this->addQuotes( $s ), 1, - 1 );
}
+ /**
+ * @param $b
+ * @return Blob
+ */
function encodeBlob( $b ) {
return new Blob( $b );
}
+ /**
+ * @param $b Blob|string
+ * @return string
+ */
function decodeBlob( $b ) {
if ( $b instanceof Blob ) {
$b = $b->fetch();
return $b;
}
+ /**
+ * @param $s Blob|string
+ * @return string
+ */
function addQuotes( $s ) {
if ( $s instanceof Blob ) {
return "x'" . bin2hex( $s->fetch() ) . "'";
}
}
- function quote_ident( $s ) {
- return $s;
- }
-
+ /**
+ * @return string
+ */
function buildLike() {
$params = func_get_args();
if ( count( $params ) > 0 && is_array( $params[0] ) ) {
}
/**
- * How lagged is this slave?
- */
- public function getLag() {
- return 0;
- }
-
- /**
- * Called by the installer script (when modified according to the MediaWikiLite installation instructions)
- * - this is the same way PostgreSQL works, MySQL reads in tables.sql and interwiki.sql using dbsource (which calls db->sourceFile)
+ * @return string
*/
- public function setup_database() {
- global $IP;
-
- # Process common MySQL/SQLite table definitions
- $err = $this->sourceFile( "$IP/maintenance/tables.sql" );
- if ( $err !== true ) {
- $this->reportQueryError( $err, 0, $sql, __FUNCTION__ );
- exit( 1 );
- }
-
- # Use DatabasePostgres's code to populate interwiki from MySQL template
- $f = fopen( "$IP/maintenance/interwiki.sql", 'r' );
- if ( $f == false ) dieout( "<li>Could not find the interwiki.sql file" );
- $sql = "INSERT INTO interwiki(iw_prefix,iw_url,iw_local) VALUES ";
- while ( !feof( $f ) ) {
- $line = fgets( $f, 1024 );
- $matches = array();
- if ( !preg_match( '/^\s*(\(.+?),(\d)\)/', $line, $matches ) ) continue;
- $this->query( "$sql $matches[1],$matches[2])" );
- }
- }
-
public function getSearchEngine() {
- return "SearchEngineDummy";
+ return "SearchSqlite";
}
/**
* No-op version of deadlockLoop
+ * @return mixed
*/
public function deadlockLoop( /*...*/ ) {
$args = func_get_args();
return call_user_func_array( $function, $args );
}
+ /**
+ * @param $s string
+ * @return string
+ */
protected function replaceVars( $s ) {
$s = parent::replaceVars( $s );
- if ( preg_match( '/^\s*CREATE TABLE/i', $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\1', $s );
+ $s = preg_replace( '/\b(var)?binary(\(\d+\))/i', 'BLOB', $s );
// no such thing as unsigned
- $s = preg_replace( '/\bunsigned\b/i', '', $s );
- // INT -> INTEGER for primary keys
- $s = preg_replacE( '/\bint\b/i', 'integer', $s );
+ $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( '/enum\([^)]*\)/i', 'blob', $s );
+ $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 );
+ $s = preg_replace( '/\bauto_increment\b/i', 'AUTOINCREMENT', $s );
// No explicit options
- $s = preg_replace( '/\)[^)]*$/', ')', $s );
+ $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 );
return $s;
}
- /*
+ /**
* Build a concatenation list to feed into a SQL query
+ *
+ * @param $stringList array
+ *
+ * @return string
*/
function buildConcat( $stringList ) {
return '(' . implode( ') || (', $stringList ) . ')';
}
+ /**
+ * @throws MWException
+ * @param $oldName
+ * @param $newName
+ * @param $temporary bool
+ * @param $fname string
+ * @return bool|ResultWrapper
+ */
+ function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseSqlite::duplicateTableStructure' ) {
+ $res = $this->query( "SELECT sql FROM sqlite_master WHERE tbl_name=" . $this->addQuotes( $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( '/(?<=\W)"?' . preg_quote( trim( $this->addIdentifierQuotes( $oldName ), '"' ) ) . '"?(?=\W)/', $this->addIdentifierQuotes( $newName ), $sql, 1 );
+ if ( $temporary ) {
+ if ( preg_match( '/^\\s*CREATE\\s+VIRTUAL\\s+TABLE\b/i', $sql ) ) {
+ wfDebug( "Table $oldName is virtual, can't create a temporary duplicate.\n" );
+ } else {
+ $sql = str_replace( 'CREATE TABLE', 'CREATE TEMPORARY TABLE', $sql );
+ }
+ }
+ return $this->query( $sql, $fname );
+ }
+
+
+ /**
+ * List all tables on the database
+ *
+ * @param $prefix string Only show tables with this prefix, e.g. mw_
+ * @param $fname String: calling function name
+ *
+ * @return array
+ */
+ function listTables( $prefix = null, $fname = 'DatabaseSqlite::listTables' ) {
+ $result = $this->select(
+ 'sqlite_master',
+ 'name',
+ "type='table'"
+ );
+
+ $endArray = array();
+
+ 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;
+ }
+
} // 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 {
+class SQLiteField implements Field {
private $info, $tableName;
function __construct( $info, $tableName ) {
$this->info = $info;
return $this->info->dflt_value;
}
- function maxLength() {
- return -1;
- }
-
- function nullable() {
- // SQLite dynamic types are always nullable
- return true;
+ /**
+ * @return bool
+ */
+ function isNullable() {
+ return !$this->info->notnull;
}
- # isKey(), isMultipleKey() not implemented, MySQL-specific concept.
- # Suggest removal from base class [TS]
-
function type() {
return $this->info->type;
}
dépôts / lhc / web / wiklou.git / blobdiff