mariadb/sql/sql_insert.h
Monty 60f08dd555 MDEV-22925 ALTER TABLE s3_table ENGINE=Aria can cause failure on slave
When converting a table (test.s3_table) from S3 to another engine, the
following will be logged to the binary log:

DROP TABLE IF EXISTS test.t1;
CREATE OR REPLACE TABLE test.t1 (...) ENGINE=new_engine
INSERT rows to test.t1 in binary-row-log-format

The bug is that the above statements are logged one by one to the binary
log. This means that a fast slave, configured to use the same S3 storage
as the master, would be able to execute the DROP and CREATE from the
binary log before the master has finished the ALTER TABLE.
In this case the slave would ignore the DROP (as it's on a S3 table) but
it will stop on CREATE of the local tale, as the table is still exists in
S3. The REPLACE part will be ignored by the slave as it can't touch the
S3 table.

The fix is to ensure that all the above statements is written to binary
log AFTER the table has been deleted from S3.
2020-06-19 12:03:13 +03:00

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2.4 KiB
C

/* Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
#ifndef SQL_INSERT_INCLUDED
#define SQL_INSERT_INCLUDED
#include "sql_class.h" /* enum_duplicates */
#include "sql_list.h"
/* Instead of including sql_lex.h we add this typedef here */
typedef List<Item> List_item;
typedef struct st_copy_info COPY_INFO;
bool mysql_prepare_insert(THD *thd, TABLE_LIST *table_list, TABLE *table,
List<Item> &fields, List_item *values,
List<Item> &update_fields,
List<Item> &update_values, enum_duplicates duplic,
COND **where, bool select_insert);
bool mysql_insert(THD *thd,TABLE_LIST *table,List<Item> &fields,
List<List_item> &values, List<Item> &update_fields,
List<Item> &update_values, enum_duplicates flag,
bool ignore, select_result* result);
void upgrade_lock_type_for_insert(THD *thd, thr_lock_type *lock_type,
enum_duplicates duplic,
bool is_multi_insert);
int check_that_all_fields_are_given_values(THD *thd, TABLE *entry,
TABLE_LIST *table_list);
int vers_insert_history_row(TABLE *table);
int check_duplic_insert_without_overlaps(THD *thd, TABLE *table,
enum_duplicates duplic);
int write_record(THD *thd, TABLE *table, COPY_INFO *info,
select_result *returning= NULL);
void kill_delayed_threads(void);
bool binlog_create_table(THD *thd, TABLE *table, bool replace);
bool binlog_drop_table(THD *thd, TABLE *table);
#ifdef EMBEDDED_LIBRARY
inline void kill_delayed_threads(void) {}
#endif
#endif /* SQL_INSERT_INCLUDED */