From https://www.reddit.com/r/mariadb/comments/17ufav9/changing_datatypes_on_replica_failing/
When a replica has a dataype changed from timestamp to datetime it stops the replication even under slave_type_conversions='ALL_LOSSY';
In a non-replication situation conversion occurs without even a warning:
MariaDB [test]> create table t (t timestamp default now());
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Query OK, 0 rows affected (0.001 sec)
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MariaDB [test]> create table d (d datetime);
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Query OK, 0 rows affected (0.001 sec)
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MariaDB [test]> insert into t() values (),(),();
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Query OK, 3 rows affected (0.001 sec)
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Records: 3 Duplicates: 0 Warnings: 0
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MariaDB [test]> select * from t;
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+---------------------+
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| t |
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+---------------------+
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| 2023-11-15 11:57:57 |
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| 2023-11-15 11:57:57 |
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| 2023-11-15 11:57:57 |
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+---------------------+
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3 rows in set (0.001 sec)
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MariaDB [test]> select * from d;
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+---------------------+
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| d |
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+---------------------+
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| 2023-11-15 11:57:57 |
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| 2023-11-15 11:57:57 |
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| 2023-11-15 11:57:57 |
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+---------------------+
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3 rows in set (0.001 sec)
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MariaDB [test]> insert into d select t from t;
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Query OK, 3 rows affected (0.001 sec)
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Records: 3 Duplicates: 0 Warnings: 0
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MariaDB [test]> select * from d;
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+---------------------+
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| d |
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+---------------------+
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| 2023-11-15 11:57:57 |
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| 2023-11-15 11:57:57 |
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| 2023-11-15 11:57:57 |
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+---------------------+
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3 rows in set (0.001 sec)
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Request that replication from timestamp to datetime columns occur (preferably without even a lossy requirement if appropriate).
rpl-lossy.test
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--source include/master-slave.inc
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connection master;
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CREATE TABLE t1 (t timestamp);
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INSERT INTO t1 values ('2023-11-15 11:57:57');
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sync_slave_with_master;
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connection slave;
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SET GLOBAL slave_type_conversions='ALL_LOSSY';
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ALTER TABLE t1 MODIFY t datetime;
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connection master;
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SET binlog_format=ROW;
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INSERT INTO t1 values ('2022-01-01 01:01:01');
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sync_slave_with_master;
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connection slave;
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SELECT * FROM t1;
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SET GLOBAL slave_type_conversions=DEFAULT;
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connection master;
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DROP TABLE t1;
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sync_slave_with_master;
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--source include/rpl_end.inc
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result
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CURRENT_TEST: main.rpl-lossy
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analyze: sync_with_master
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mysqltest: At line 20: sync_slave_with_master failed: 'select master_pos_wait('master-bin.000001', 985, 300, '')' returned NULL indicating slave SQL thread failure
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== /home/dan/repos/build-mariadb-server-10.4/mysql-test/var/tmp/analyze-sync_with_master-mysqld.2.err ==
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############################## default ##############################
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**** SHOW WARNINGS on default ****
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SHOW WARNINGS;
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Level Code Message
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**** SELECT replication-related variables on default ****
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SELECT NOW(), @@SERVER_ID;
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NOW() @@SERVER_ID
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2023-11-15 12:07:25 2
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**** SHOW SLAVE STATUS on default ****
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SHOW SLAVE STATUS;
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...
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Last_Errno 1677
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Last_Error Column 0 of table 'test.t1' cannot be converted from type 'timestamp' to type 'datetime'
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Skip_Counter 0
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- relates to
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MDEV-17098
DATE -> DATETIME replication conversion not working, even in ALL_NON_LOSSY mode
-
-
Closed
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