mariadb/mysql-test/suite/innodb/r/stat_tables.result at 5f09b53bdb4e973e7c7ec2c53a24c98321223f98 - mirror/mariadb - May the force be without you: git.fucktheforce.de

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Sergei Golubchik 5392b4a32c MDEV-20354 All but last insert ignored in InnoDB tables when table locked

mysql_insert() first opens all affected tables (which implicitly
starts a transaction in InnoDB), then stat tables.
A failure to open a stat table caused open_tables() to abort
the current stmt transaction (trans_rollback_stmt()). So, from the
server point of view the following ha_write_row()-s happened outside
of a transactions, and the server didn't bother to commit them.

The server has a mechanism to prevent a transaction being
unexpectedly committed or rolled back in the middle of a statement -
if an operation takes place _in a sub-statement_ it cannot change
the transaction state. Operations on stat tables are exactly that -
they are not allowed to change a transaction state. Put them in
a sub-statement to make sure they don't.

2019-10-30 23:14:44 +01:00

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 rename table mysql.table_stats to mysql.table_stats_save;
 flush tables;
 set use_stat_tables= PREFERABLY;
 create table t1 (a int) engine=InnoDB;
 start transaction;
 insert t1 values (1);
 insert t1 values (2);
 commit;
 select * from t1;
 a
 
 
 drop table t1;
 rename table mysql.table_stats_save to mysql.table_stats;
 flush tables;