{"record":{"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, $table)\n    {\n        throw new RuntimeException('This database driver does not support retrieving indexes.');\n    }\n\n    /**\n     * Compile a vector index key command.","sourceCodeStart":122,"sourceCodeEnd":158,"githubUrl":"https://github.com/laravel/framework/blob/e0f6eb3518ac29fbbca8529e97d0df7fc9f24481/src/Illuminate/Database/Schema/Grammars/Grammar.php#L122-L158","documentation":"Grammar::compileColumns() is a RuntimeException stub on the base class. All four shipped grammars override it, so reaching the base means an unimplemented/custom grammar. Builder::getColumns(), getColumnListing(), getColumnType(), hasColumn(), and the column paths of getIndexes() all route through here.","triggerScenarios":"Any column-introspection call (Schema::getColumns, hasColumn, getColumnType, getColumnListing) on a connection whose SchemaGrammar is the base Grammar. Typically a custom driver whose Connection::getDefaultSchemaGrammar() returns the base class.","commonSituations":"A community driver whose grammar was scaffolded but never implemented; a mocked test that injects the base Grammar; upgrading a driver package that temporarily removed overrides.","solutions":["Switch the connection to a supported driver (sqlite/mysql/pgsql/sqlsrv).","Implement compileColumns($schema, $table) in your custom grammar, returning the engine's column-listing SQL.","Query information_schema.columns directly as a temporary measure."],"exampleFix":"// before - base grammar throws\n$cols = Schema::connection('custom')->getColumns('users');\n\n// after - implement in CustomGrammar, or query raw\n$cols = DB::connection('custom')->select(\n    \"SELECT column_name, data_type FROM information_schema.columns WHERE table_name = ?\",\n    ['users']\n);","handlingStrategy":"type-guard","validationCode":"$grammar = Schema::getConnection()->getSchemaGrammar();\nif (get_class($grammar) === \\Illuminate\\Database\\Schema\\Grammars\\Grammar::class) {\n    throw new \\DomainException('Connection uses the base Grammar; cannot list columns.');\n}","typeGuard":"function supportsCompileColumns(\\Illuminate\\Database\\Schema\\Grammars\\Grammar $grammar): bool\n{\n    return (new \\ReflectionMethod($grammar, 'compileColumns'))\n        ->getDeclaringClass()->getName() !== \\Illuminate\\Database\\Schema\\Grammars\\Grammar::class;\n}","tryCatchPattern":"try {\n    $cols = Schema::getColumns('users');\n} catch (\\RuntimeException $e) {\n    if (str_contains($e->getMessage(), 'retrieving columns')) {\n        $cols = DB::select('SELECT column_name, data_type FROM information_schema.columns WHERE table_name = ?', ['users']);\n    } else {\n        throw $e;\n    }\n}","preventionTips":["Bind a concrete grammar in every custom connection.","Implement compileColumns when authoring a new grammar - it underpins hasColumn, getColumnType, getColumnListing too.","Smoke-test migrations against the target engine in CI, not just SQLite."],"tags":["schema","grammar","database-driver","columns","runtime-exception"],"backgroundTag":null,"analyzedSha":"e0f6eb3518ac29fbbca8529e97d0df7fc9f24481","analyzedAt":"2026-08-11T20:52:37.562Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}