Method print_explain_json

sql/sql_explain.cc:266–297

int Explain_query::print_explain_json(select_result_sink *output,
                                      bool is_analyze,
                                      ulonglong query_time_in_progress_ms)
{
  Json_writer writer;

#ifndef DBUG_OFF
  DBUG_ASSERT(can_print_json);
#endif

  writer.start_object();

  if (is_analyze)
  {
    if (query_time_in_progress_ms > 0){
      writer.add_member("r_query_time_in_progress_ms").
            add_ull(query_time_in_progress_ms);
    }

    print_query_optimization_json(&writer);
  }

  bool plan_found = print_query_blocks_json(&writer, is_analyze);
  writer.end_object();

  if( plan_found )
  {
    send_explain_json_to_output(&writer, output);
  }
  
  return 0;
}

void Explain_query::print_query_optimization_json(Json_writer *writer)
{