{ 'is_analyzed' => 1, 'actual_time_first' => '0.008', 'estimated_rows' => '1', 'estimated_total_cost' => '0.04', 'estimated_row_width' => '194', 'actual_time_last' => '0.008', 'estimated_startup_cost' => '0', 'actual_rows' => '1', 'sub_nodes' => [ { 'scan_on' => { 'table_alias' => 'pg_class', 'table_name' => 'pg_class' }, 'is_analyzed' => 1, 'actual_time_first' => '0.008', 'estimated_rows' => '281', 'estimated_total_cost' => '10.81', 'estimated_row_width' => '194', 'actual_time_last' => '0.008', 'estimated_startup_cost' => '0', 'actual_rows' => '1', 'type' => 'Seq Scan', 'actual_loops' => '1' } ], 'type' => 'Limit', 'actual_loops' => '1' }