<?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;
* Constructor.
* Parameters $server, $user and $password are not used.
*/
- function __construct( $server = false, $user = false, $password = false, $dbName = false, $failFunction = false, $flags = 0 ) {
- global $wgSQLiteDataDir;
- $this->mFailFunction = $failFunction;
+ function __construct( $server = false, $user = false, $password = false, $dbName = false, $flags = 0 ) {
+ global $wgSharedDB;
$this->mFlags = $flags;
- $this->mDatabaseFile = self::generateFileName( $wgSQLiteDataDir, $dbName );
- if( !is_readable( $this->mDatabaseFile ) )
- throw new DBConnectionError( $this, "SQLite database not accessible" );
$this->mName = $dbName;
- $this->open( $server, $user, $password, $dbName );
+
+ if ( $this->open( $server, $user, $password, $dbName ) && $wgSharedDB ) {
+ $this->attachDatabase( $wgSharedDB );
+ }
}
function getType() {
*/
function implicitGroupby() { return false; }
- static function newFromParams( $server, $user, $password, $dbName, $failFunction = false, $flags = 0 ) {
- return new DatabaseSqlite( $server, $user, $password, $dbName, $failFunction, $flags );
+ 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 ) {
- $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;
+ $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", '', '' );
}
- $this->mOpened = $this->mConn;
- # set error codes only, don't raise exceptions
+ } 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;
}
- return $this->mConn;
}
/**
return "$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
*/
function getFulltextSearchModule() {
+ static $cachedResult = null;
+ if ( $cachedResult !== null ) {
+ return $cachedResult;
+ }
+ $cachedResult = false;
$table = 'dummy_search_test';
$this->query( "DROP TABLE IF EXISTS $table", __METHOD__ );
+
if ( $this->query( "CREATE VIRTUAL TABLE $table USING FTS3(dummy_field)", __METHOD__, true ) ) {
$this->query( "DROP TABLE IF EXISTS $table", __METHOD__ );
- return 'FTS3';
+ $cachedResult = 'FTS3';
}
- return false;
+ 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 );
}
/**
}
function freeResult( $res ) {
- if ( $res instanceof ResultWrapper )
+ if ( $res instanceof ResultWrapper ) {
$res->result = null;
- else
+ } else {
$res = null;
+ }
}
- function fetchObject($res) {
- if ($res instanceof ResultWrapper)
+ 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 )
+ 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;
* 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 ) );
}
}
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 );
+ }
+ }
}
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] : '';
}
* Filter the options used in SELECT statements
*/
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 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 );
+ 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' )
+ 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 $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 );
}
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 $k => $v )
- if ( !parent::replace( $table, $uniqueIndexes, $v, "$fname/multi-row" ) )
+ 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 implode( $glue, $sqls );
}
+ public function unixTimestamp( $field ) {
+ return $field;
+ }
+
function wasDeadlock() {
return $this->lastErrno() == 5; // SQLITE_BUSY
}
/**
* @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( $this->getFulltextSearchModule() ? 'sqlite-has-fts' : 'sqlite-no-fts', $this->getServerVersion() );
}
/**
}
}
- function quote_ident( $s ) {
- return $s;
- }
-
function buildLike() {
$params = func_get_args();
if ( count( $params ) > 0 && is_array( $params[0] ) ) {
return parent::buildLike( $params ) . "ESCAPE '\' ";
}
- /**
- * 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)
- */
- 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 "SearchSqlite";
}
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 );
} elseif ( preg_match( '/^\s*CREATE (\s*(?:UNIQUE|FULLTEXT)\s+)?INDEX/i', $s ) ) {
// No truncated indexes
$s = preg_replace( '/\(\d+\)/', '', $s );
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 );
- $sql = $this->fetchObject( $res )->sql;
+ $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 {
+class SQLiteField implements Field {
private $info, $tableName;
function __construct( $info, $tableName ) {
$this->info = $info;
return $this->info->dflt_value;
}
- function maxLength() {
- return -1;
- }
-
- function nullable() {
- // SQLite dynamic types are always nullable
- return true;
+ function isNullable() {
+ return !$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