The --skip-write-binary-log added to mysql_tzinfo_to_sql in
MDEV-18778 was only effective if galera was enabled on the server.
This is because it tied together three concepts under one option:
1. binary logging
2. wsrep replication, and
3. using innodb as a transitional table type.
Change 1: small change in help option to reflect this.
To solve the performance problem with Aria tables, LOCK TABLES WRITE
is used to eliminate the need to fdatasync until the UNLOCK TABLES.
If galera isn't enabled, then we also want to use the LOCK TABLE WRITE
mechanism.
The START TRANSACTION added in MDEV-23440 needed to be moved to
before LOCK TABLES otherwise it would cancel their effect.
TRUNCATE TABLE statements also need to be before the LOCK TABLES.
When changing back from InnoDB to Aria, include the ORDER BY that
was originally there in 6aaccbcbf7 and matching the final ALTER
TABLE in the timezonedir branch.
Running: mariadb-tzinfo-to-sql --skip-write-binlog /usr/share/zoneinfo
now generates 16 Aria_transaction_log_syncs from 7053.
In the merge eae968f62d, it turns out that
I had accidentally initiated an in-source build in the past, and
$MYSQL_TZINFO_TO_SQL was pointing to a stale copy of the executable in
the source directory, instead of the correct one in the build directory.
There were two problems:
(1) If user wanted same time zone information on all nodes in the Galera
cluster all updates were not replicated as time zone information was
stored on MyISAM tables. This is fixed on Galera by altering time zone
tables to InnoDB while they are modified.
(2) If user wanted different time zone information to nodes in the Galera
cluster TRUNCATE TABLE for time zone tables was replicated by Galera
destroying time zone information from other nodes. This is fixed
on Galera by introducing new option for mysql_tzinfo_to_sql_symlink
tool --skip-write-binlog to disable Galera replication while
time zone tables are modified.
Changes to be committed:
modified: mysql-test/r/mysql_tzinfo_to_sql_symlink.result
modified: mysql-test/suite/wsrep/r/mysql_tzinfo_to_sql_symlink.result
new file: mysql-test/suite/wsrep/r/mysql_tzinfo_to_sql_symlink_skip.result
new file: mysql-test/suite/wsrep/t/mysql_tzinfo_to_sql_symlink_skip.test
modified: sql/tztime.cc
This is 10.4 version of commit fa74088838
