MediaWiki 1.17.0

[autoinstallsdev/mediawiki.git] / maintenance / sqlite.inc

diff --git a/maintenance/sqlite.inc b/maintenance/sqlite.inc
new file mode 100644 (file)
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+++ b/maintenance/sqlite.inc
@@ -0,0 +1,67 @@
+<?php
+
+/**
+ * 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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