Function compare_table_with_partition

sql/sql_partition_admin.cc:196–304

@brief Compare table structure/options between a non partitioned table and a specific partition of a partitioned table. @param thd Thread object. @param table Non partitioned table. @param part_table Partitioned table. @param part_elem Partition element to use for partition specific compare. */

  @param part_elem  Partition element to use for partition specific compare.
*/
bool compare_table_with_partition(THD *thd, TABLE *table, TABLE *part_table,
                                  partition_element *part_elem, uint part_id)
{
  HA_CREATE_INFO table_create_info;
  Table_specification_st part_create_info;
  Alter_info part_alter_info;
  Alter_table_ctx part_alter_ctx; // Not used
  DBUG_ENTER("compare_table_with_partition");

  bool metadata_equal= false;
  part_create_info.init();
  table_create_info.init();

  update_create_info_from_table(&table_create_info, table);
  /* get the current auto_increment value */
  table->file->update_create_info(&table_create_info);
  /* mark all columns used, since they are used when preparing the new table */
  part_table->use_all_columns();
  table->use_all_columns();
  if (unlikely(mysql_prepare_alter_table(thd, part_table, &part_create_info,
                                         &part_alter_info, &part_alter_ctx)))
  {
    my_error(ER_TABLES_DIFFERENT_METADATA, MYF(0));
    DBUG_RETURN(TRUE);
  }
  /* db_type is not set in prepare_alter_table */
  part_create_info.db_type= part_table->part_info->default_engine_type;
  ((ha_partition*)(part_table->file))->update_part_create_info(&part_create_info, part_id);
  /*
    Since we exchange the partition with the table, allow exchanging
    auto_increment value as well.
  */
  part_create_info.auto_increment_value=
                                table_create_info.auto_increment_value;

  /* Check compatible row_types and set create_info accordingly. */
  {
    enum row_type part_row_type= part_table->file->get_row_type();
    enum row_type table_row_type= table->file->get_row_type();
    if (part_row_type != table_row_type)
    {
      my_error(ER_PARTITION_EXCHANGE_DIFFERENT_OPTION, MYF(0),
               "ROW_FORMAT");
      DBUG_RETURN(true);
    }
    part_create_info.row_type= table->s->row_type;
  }

  /*
    NOTE: ha_blackhole does not support check_if_compatible_data,
    so this always fail for blackhole tables.
    ha_myisam compares pointers to verify that DATA/INDEX DIRECTORY is
    the same, so any table using data/index_file_name will fail.
  */
  if (mysql_compare_tables(table, &part_alter_info, &part_create_info,
                           &metadata_equal))
  {
    my_error(ER_TABLES_DIFFERENT_METADATA, MYF(0));