{"id":"a2af630a7e1f259a","repo":"laravel/framework","slug":"this-database-driver-does-not-support-retrieving-c","errorCode":null,"errorMessage":"This database driver does not support retrieving columns.","messagePattern":"This database driver does not support retrieving columns\\.","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"src/Illuminate/Database/Schema/Grammars/Grammar.php","lineNumber":140,"sourceCode":"     * @throws \\RuntimeException\n     */\n    public function compileTypes($schema)\n    {\n        throw new RuntimeException('This database driver does not support retrieving user-defined types.');\n    }\n\n    /**\n     * Compile the query to determine the columns.\n     *\n     * @param  string|null  $schema\n     * @param  string  $table\n     * @return string\n     *\n     * @throws \\RuntimeException\n     */\n    public function compileColumns($schema, $table)\n    {\n        throw new RuntimeException('This database driver does not support retrieving columns.');\n    }\n\n    /**\n     * Compile the query to determine the indexes.\n     *\n     * @param  string|null  $schema\n     * @param  string  $table\n     * @return string\n     *\n     * @throws \\RuntimeException\n     */\n    public function compileIndexes($schema, $table)\n    {\n        throw new RuntimeException('This database driver does not support retrieving indexes.');\n    }\n\n    /**\n     * Compile a vector index key command.","sourceCodeStart":122,"sourceCodeEnd":158,"githubUrl":"https://github.com/laravel/framework/blob/bd6b5437e6ad87bb49f9b426724f07a9f64e9683/src/Illuminate/Database/Schema/Grammars/Grammar.php#L122-L158","documentation":"Base Grammar::compileColumns() throws RuntimeException when the driver's grammar does not override it. It builds the information-schema query behind Schema::getColumns()/getColumnListing()/getColumnType(). All first-class drivers override it, so hitting it means a custom/incomplete grammar is bound to the connection.","triggerScenarios":"Calling Schema::getColumns($table), Schema::getColumnListing($table), or Schema::getColumnType($table,$col) on a Connection whose schema grammar is the base Grammar or a subclass that did not override compileColumns.","commonSituations":"Custom driver extending Grammar without implementing compileColumns; community driver that lags the framework version; misconfigured connection defaulting to a stub.","solutions":["Switch to a first-class driver (mysql, pgsql, sqlite, sqlsrv).","If you own the driver, override compileColumns($schema, $table) with the engine's column-catalogue SQL.","Confirm config/database.php maps the connection to the intended driver class."],"exampleFix":"// before — custom grammar missing compileColumns\n$cols = Schema::connection('custom')->getColumns('users');\n\n// after\nclass CustomGrammar extends \\Illuminate\\Database\\Schema\\Grammars\\Grammar\n{\n    public function compileColumns($schema, $table)\n    {\n        return 'select ... from information_schema.columns where table_name = ...';\n    }\n}","handlingStrategy":"type-guard","validationCode":"$grammar = Schema::getConnection()->getSchemaGrammar();\nif ((new \\ReflectionMethod($grammar, 'compileColumns'))->getDeclaringClass()->getName()\n    === \\Illuminate\\Database\\Schema\\Grammars\\Grammar::class) {\n    throw new \\RuntimeException('Column listing unsupported on '.DB::connection()->getDriverName());\n}\nreturn Schema::getColumns($table);","typeGuard":"function driverSupportsColumnListing(): bool\n{\n    $g = Schema::getConnection()->getSchemaGrammar();\n\n    return (new \\ReflectionMethod($g, 'compileColumns'))\n        ->getDeclaringClass()->getName() !== \\Illuminate\\Database\\Schema\\Grammars\\Grammar::class;\n}","tryCatchPattern":"try {\n    $cols = Schema::getColumns($table);\n} catch (\\RuntimeException $e) {\n    // surface — caller must use a supported driver\n    throw $e;\n}","preventionTips":["Use a first-class driver for column introspection.","Implement compileColumns on custom grammars.","Verify connection bindings in config/database.php."],"tags":["schema","database","driver-support","grammar","columns","catalogue"],"analyzedSha":"bd6b5437e6ad87bb49f9b426724f07a9f64e9683","analyzedAt":"2026-08-06T00:28:32.783Z","schemaVersion":2}