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  1. MariaDB Server
  2. MDEV-28263

mariadb-tzinfo-to-sql binlog, embedded, and performance fixes

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    Description

      MDEV-18778 (10.2) broke using the output in embedded server mode (and no-one noticed) because the SQL generated required the delimiter parsing in the client.

      A mtr test mysql_tzinfo_to_sql_symlink.test to work with embedded mode

      		 
      --exec $MYSQL_TZINFO_TO_SQL $MYSQLTEST_VARDIR/zoneinfo > $MYSQL_TMP_DIR/tz.sql
      		 
      --source $MYSQL_TMP_DIR/tz.sql

      MDEV-23326 (10.4) didn't do a LOCK TABLES in the non-skip_write_binlog branch of the code and should have.

      The --skip-write-binlog option from MDEV-18778 that doesn't always skip-write-binlog is just horribly confusing. As bnestere said, what breaks? "explicitly providing --skip-write-binlog, but actually wants mysql-tzinfo-to-sql to be binlogged".

      Lastly, we could make the SQL generated preserve the session SQL_LOG_BIN state.

      There's also a 10.6 case with wsrep_mode=REPLICA_ARIA where there isn't a need to change to InnoDB for replicating, but its a fairly minor case.

      Implementation

      Using user variables and EXECUTE IMMEDIATE prevents the need to use delimiter or a stored procedure.

      draft implementation (against 10.6) (wsrep_mode=REPLICA_ARIA could be removed and the rest is 10.4 friendly (where MDEV-23326 was added).

      Some test cases from a previous MDEV-23326 draft may be useful.

      A 10.3 fix by moving SQL_LOG_BIN=? out of the WSREP_ON=ON condition.

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          is caused by

          Bug - A problem which impairs or prevents the functions of the product. MDEV-18778 mysql_tzinfo_to_sql does not work correctly in MariaDB Galera

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-23326 aria TRANSACTIONAL=1 significantly slow on timezone intialisation (was: time zone initialision significantly slower in 10.4 compared to 10.3 (myisam))

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDBF-389 provide timezone data files

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-28782 mariadb-tzinfo-to-sql to work in bootstrap mode

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-30854 mariadb-tzinfo-to-sql creates sql_mode dependant statements

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

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              danblack Daniel Black
              danblack Daniel Black
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                Updated:
                Resolved:

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