Method clone

sql/ha_sequence.cc:144–176

*/

handler *ha_sequence::clone(const char *name, MEM_ROOT *mem_root)
{
  ha_sequence *new_handler;
  DBUG_ENTER("ha_sequence::clone");
  if (!(new_handler= new (mem_root) ha_sequence(ht, table_share)))
    DBUG_RETURN(NULL);

  /*
    Allocate new_handler->ref here because otherwise ha_open will allocate it
    on this->table->mem_root and we will not be able to reclaim that memory
    when the clone handler object is destroyed.
  */

  if (!(new_handler->ref= (uchar*) alloc_root(mem_root,
                                              ALIGN_SIZE(ref_length)*2)))
    goto err;

  if (new_handler->ha_open(table, name,
                           table->db_stat,
                           HA_OPEN_IGNORE_IF_LOCKED | HA_OPEN_NO_PSI_CALL))
    goto err;

  /* Reuse original storage engine data for duplicate key reference */
  new_handler->ref=        file->ref;
  new_handler->ref_length= file->ref_length;
  new_handler->dup_ref=    file->dup_ref;

  DBUG_RETURN((handler*) new_handler);

err:
  delete new_handler;
  DBUG_RETURN(NULL);
}


/*