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<?php
/**
* Helper class for sqlite-specific scripts
*
* 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
* @ingroup Maintenance
*/
/**
* This class contains code common to different SQLite-related maintenance scripts
*/
class Sqlite {
/**
* Checks whether PHP has SQLite support
* @return bool
*/
public static function isPresent() {
wfSuppressWarnings();
$compiled = wfDl( 'pdo_sqlite' );
wfRestoreWarnings();
return $compiled;
}
/**
* Checks given files for correctness of SQL syntax. MySQL DDL will be converted to
* SQLite-compatible during processing.
* Will throw exceptions on SQL errors
* @return mixed true if no error or error string in case of errors
*/
public static function checkSqlSyntax( $files ) {
if ( !Sqlite::isPresent() ) {
throw new MWException( "Can't check SQL syntax: SQLite not found" );
}
if ( !is_array( $files ) ) {
$files = array( $files );
}
$allowedTypes = array_flip( array(
'integer',
'real',
'text',
'blob', // NULL type is omitted intentionally
) );
$db = new DatabaseSqliteStandalone( ':memory:' );
try {
foreach ( $files as $file ) {
$err = $db->sourceFile( $file );
if ( $err != true ) {
return $err;
}
}
$tables = $db->query( "SELECT name FROM sqlite_master WHERE type='table'", __METHOD__ );
foreach ( $tables as $table ) {
if ( strpos( $table->name, 'sqlite_' ) === 0 ) continue;
$columns = $db->query( "PRAGMA table_info({$table->name})", __METHOD__ );
foreach ( $columns as $col ) {
if ( !isset( $allowedTypes[strtolower( $col->type )] ) ) {
$db->close();
return "Table {$table->name} has column {$col->name} with non-native type '{$col->type}'";
}
}
}
} catch ( DBError $e ) {
return $e->getMessage();
}
$db->close();
return true;
}
};
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