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BUG#28642318: POINT IN TIME RECOVERY USING MYSQLBINLOG BROKEN WITH TEMPORARY TABLE -> ERRORS

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Analysis
========
Point in time recovery using mysqlbinlog containing queries
operating on temporary tables results in an error.

While writing the query log event in the binary log, the
thread id used for execution of DROP TABLE and DELETE commands
were incorrect. The thread variable 'thread_specific_used'
is used to determine whether a specific thread id is to used
while executing the statements i.e using 'SET
@@session.pseudo_thread_id'. This variable was not set
correctly for DROP TABLE query and was never set for DELETE
query. The thread id is important for temporary tables
since the tables are session specific. DROP TABLE and DELETE
queries executed using a wrong thread id resulted in errors
while applying the queries generated by mysqlbinlog utility.

Fix
===
Set the 'thread_specific_used' THD variable for DROP TABLE and
DELETE queries.

ReviewBoard: 21833
This commit is contained in:
Nisha Gopalakrishnan
2019-04-17 15:36:29 +05:30
committed by Sergei Golubchik
parent 7473a71a28
commit 2536c0b1eb
5 changed files with 129 additions and 6 deletions
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27
mysql-test/suite/binlog/r/binlog_stm_drop_tmp_tbl.result
View File

@@ -63,3 +63,30 @@ master-bin.000001 # Query # # COMMIT
master-bin.000001 # Query # # use `test`; DROP /*!40005 TEMPORARY */ TABLE IF EXISTS `ttmp1`
RESET MASTER;
DROP TABLE t1;
#
# BUG#28642318: POINT IN TIME RECOVERY USING MYSQLBINLOG BROKEN
# WITH TEMPORARY TABLE -> ERRORS
# Test case for DELETE query.
RESET MASTER;
# Set up.
SET @save_binlog_format= @@session.binlog_format;
SET @@session.binlog_format=STATEMENT;
CREATE TABLE t1 (a INT) ENGINE=INNODB;
SET @@session.binlog_format=STATEMENT;
CREATE TEMPORARY TABLE t1 (b BLOB) ENGINE=INNODB;
DELETE d1, d2 FROM t1 AS d1, t1 AS d2 WHERE d1.a<>d2.a;
DROP TABLE t1;
# DELETE query fails with table re-open error without patch.
# Clean up.
DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t1;
RESET MASTER;
# Test case for DROP query.
CREATE TABLE t1 (a INT) ENGINE=INNODB;
CREATE TEMPORARY TABLE t1 (b BLOB) ENGINE=INNODB;
DROP TABLE t1;
DROP TABLE t1;
# DROP table query fails with unknown table error without patch.
# Clean up
SET @@session.binlog_format= @save_binlog_format;
RESET MASTER;