Function copy_data_error_ignore

sql/sql_table.cc:12548–12592

Handle the error when copying data from source to target table. @param error error code @param ignore alter ignore statement @param to target table handler @param thd Mysql Thread @param alter_ctx Runtime context for alter statement @retval false in case of error @retval true in case of skipping the row and continue alter operation */

@retval false in case of error
@retval true in case of skipping the row and continue alter operation */
static bool
copy_data_error_ignore(int &error, bool ignore, TABLE *to,
                       THD *thd, Alter_table_ctx *alter_ctx)
{
  if (to->file->is_fatal_error(error, HA_CHECK_DUP))
  {
    /* Not a duplicate key error. */
    to->file->print_error(error, MYF(0));
    error= 1;
    return false;
  }
  /* Duplicate key error. */
  if (unlikely(alter_ctx->fk_error_if_delete_row))
  {
    /* We are trying to omit a row from the table which serves
    as parent in a foreign key. This might have broken
    referential integrity so emit an error. Note that we
    can't ignore this error even if we are
    executing ALTER IGNORE TABLE. IGNORE allows to skip rows, but
    doesn't allow to break unique or foreign key constraints, */
    my_error(ER_FK_CANNOT_DELETE_PARENT, MYF(0),
             alter_ctx->fk_error_id,
             alter_ctx->fk_error_table);
    return false;
  }
  if (ignore)
    return true;
  /* Ordinary ALTER TABLE. Report duplicate key error. */
  uint key_nr= to->file->get_dup_key(error);
  if (key_nr <= MAX_KEY)
  {
    const char *err_msg= ER_THD(thd, ER_DUP_ENTRY_WITH_KEY_NAME);
    if (key_nr == 0 && to->s->keys > 0 &&
        (to->key_info[0].key_part[0].field->flags &
            AUTO_INCREMENT_FLAG))
      err_msg= ER_THD(thd, ER_DUP_ENTRY_AUTOINCREMENT_CASE);
    print_keydup_error(to,
                       key_nr >= to->s->keys ? NULL :
                       &to->key_info[key_nr],
                       err_msg, MYF(0));
  }
  else
    to->file->print_error(error, MYF(0));
  return false;
}

static int
copy_data_between_tables(THD *thd, TABLE *from, TABLE *to,