Function get_schema_stat_record

sql/sql_show.cc:7429–7571

static int get_schema_stat_record(THD *thd, TABLE_LIST *tables, TABLE *table,
                                  bool res, const LEX_CSTRING *db_name,
				  const LEX_CSTRING *table_name)
{
  CHARSET_INFO *cs= system_charset_info;
  DBUG_ENTER("get_schema_stat_record");
  if (!tables->view)
  {
    TABLE *show_table= tables->table;
    KEY *key_info= show_table->s->key_info;
    if (show_table->file)
    {
      (void) read_statistics_for_tables(thd, tables, false);
      show_table->file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK |
                             HA_STATUS_CONST | HA_STATUS_TIME);
      set_statistics_for_table(thd, show_table);
    }

    bool need_column_checks= !get_schema_privileges_for_show(thd, tables,
                                                             TABLE_ACLS, false);

    for (uint i=0 ; i < show_table->s->total_keys ; i++,key_info++)
    {
      if ((key_info->flags & HA_INVISIBLE_KEY) &&
          !DBUG_IF("test_invisible_index"))
        continue;
      KEY_PART_INFO *key_part= key_info->key_part;
      LEX_CSTRING *str;
      LEX_CSTRING unknown= {STRING_WITH_LEN("?unknown field?") };

      if (need_column_checks)
      {
        uint j;
        for (j=0 ; j < key_info->user_defined_key_parts ; j++,key_part++)
        {
          auto access= get_column_grant(thd, &tables->grant, db_name->str,
                                        table_name->str,
                                        key_part->field->field_name);

          if (!access)
            break;
        }
        if (j != key_info->user_defined_key_parts)
          continue;
        key_part= key_info->key_part;
      }

      for (uint j=0 ; j < key_info->user_defined_key_parts ; j++,key_part++)
      {
        if (key_part->field->invisible >= INVISIBLE_SYSTEM &&
            !DBUG_IF("test_completely_invisible"))
        {
          /*
            NOTE: we will get SEQ_IN_INDEX gap inside the result if this key_part
            is not last (currently not possible). Though nothing is wrong with
            that probably.
          */
          continue;