{
    'scan_on' => {
        'index_name' => 'pg_class_oid_index',
        'table_name' => 'pg_class'
    },
    'is_analyzed'            => 1,
    'actual_time_first'      => '0.035',
    'estimated_rows'         => '1',
    'estimated_total_cost'   => '8.44',
    'estimated_row_width'    => '194',
    'actual_time_last'       => '0.036',
    'estimated_startup_cost' => '0.17',
    'actual_rows'            => '1',
    'extra_info'             => [
        'Index Cond: (oid = $1)',
    ],
    'initplans' => [
        {
            'is_analyzed'            => 1,
            'actual_time_first'      => '0.023',
            'estimated_rows'         => '1',
            'estimated_total_cost'   => '0.17',
            'estimated_row_width'    => '0',
            'actual_time_last'       => '0.023',
            'estimated_startup_cost' => '0.16',
            'actual_rows'            => '1',
            'initplans'              => [
                {
                    'is_analyzed'            => 1,
                    'actual_time_first'      => '0.02',
                    'estimated_rows'         => '1',
                    'estimated_total_cost'   => '0.16',
                    'estimated_row_width'    => '4',
                    'actual_time_last'       => '0.021',
                    'estimated_startup_cost' => '0',
                    'actual_rows'            => '1',
                    'sub_nodes'              => [
                        {
                            'scan_on' => {
                                'index_name' => 'pg_class_oid_index',
                                'table_name' => 'pg_class'
                            },
                            'is_analyzed'            => 1,
                            'actual_time_first'      => '0.019',
                            'estimated_rows'         => '281',
                            'estimated_total_cost'   => '44.47',
                            'estimated_row_width'    => '4',
                            'actual_time_last'       => '0.019',
                            'estimated_startup_cost' => '0',
                            'actual_rows'            => '1',
                            'extra_info'             => [ 'Index Cond: (oid IS NOT NULL)' ],
                            'type'                   => 'Index Scan',
                            'actual_loops'           => '1'
                        }
                    ],
                    'type'         => 'Limit',
                    'actual_loops' => '1'
                }
            ],
            'type'         => 'Result',
            'actual_loops' => '1'
        }
    ],
    'type'         => 'Index Scan',
    'actual_loops' => '1'
}