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| 1 | <?php |
| 2 | /** |
| 3 | * Helper class for sqlite-specific scripts |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 18 | * http://www.gnu.org/copyleft/gpl.html |
| 19 | * |
| 20 | * @file |
| 21 | * @ingroup Maintenance |
| 22 | */ |
| 23 | |
| 24 | use Wikimedia\Rdbms\DatabaseSqlite; |
| 25 | use Wikimedia\Rdbms\DBError; |
| 26 | |
| 27 | /** |
| 28 | * This class contains code common to different SQLite-related maintenance scripts |
| 29 | * |
| 30 | * @ingroup Maintenance |
| 31 | */ |
| 32 | class Sqlite { |
| 33 | |
| 34 | /** |
| 35 | * Checks whether PHP has SQLite support |
| 36 | * @return bool |
| 37 | */ |
| 38 | public static function isPresent() { |
| 39 | return extension_loaded( 'pdo_sqlite' ); |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * Checks given files for correctness of SQL syntax. MySQL DDL will be converted to |
| 44 | * SQLite-compatible during processing. |
| 45 | * Will throw exceptions on SQL errors |
| 46 | * @param array|string $files |
| 47 | * @return true|string True if no error or error string in case of errors |
| 48 | */ |
| 49 | public static function checkSqlSyntax( $files ) { |
| 50 | if ( !self::isPresent() ) { |
| 51 | throw new RuntimeException( "Can't check SQL syntax: SQLite not found" ); |
| 52 | } |
| 53 | if ( !is_array( $files ) ) { |
| 54 | $files = [ $files ]; |
| 55 | } |
| 56 | |
| 57 | $allowedTypes = array_fill_keys( [ |
| 58 | 'integer', |
| 59 | 'real', |
| 60 | 'text', |
| 61 | 'blob', |
| 62 | // NULL type is omitted intentionally |
| 63 | ], true ); |
| 64 | |
| 65 | $db = DatabaseSqlite::newStandaloneInstance( ':memory:' ); |
| 66 | try { |
| 67 | foreach ( $files as $file ) { |
| 68 | $err = $db->sourceFile( $file ); |
| 69 | if ( $err ) { |
| 70 | return $err; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | $tables = $db->query( "SELECT name FROM sqlite_master WHERE type='table'", __METHOD__ ); |
| 75 | foreach ( $tables as $table ) { |
| 76 | if ( strpos( $table->name, 'sqlite_' ) === 0 ) { |
| 77 | continue; |
| 78 | } |
| 79 | |
| 80 | $columns = $db->query( |
| 81 | 'PRAGMA table_info(' . $db->addIdentifierQuotes( $table->name ) . ')', |
| 82 | __METHOD__ |
| 83 | ); |
| 84 | foreach ( $columns as $col ) { |
| 85 | if ( !isset( $allowedTypes[strtolower( $col->type )] ) ) { |
| 86 | $db->close( __METHOD__ ); |
| 87 | |
| 88 | return "Table {$table->name} has column {$col->name} with non-native type '{$col->type}'"; |
| 89 | } |
| 90 | } |
| 91 | } |
| 92 | } catch ( DBError $e ) { |
| 93 | return $e->getMessage(); |
| 94 | } |
| 95 | $db->close( __METHOD__ ); |
| 96 | |
| 97 | return true; |
| 98 | } |
| 99 | } |