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BUG#49222: Mark RAND() as unsafe

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Problem: When RAND() is binlogged in statement mode, the seed is
binlogged too, so the replication slave generates the same
sequence of random numbers. This makes replication work in many
cases, but not in all cases: the order of rows is not guaranteed
for, e.g., UPDATE or INSERT...SELECT statements, so the row data
will be different if master and slave retrieve the rows in
different orders.
Fix: Mark RAND() as unsafe. It will generate a warning if
binlog_format=STATEMENT and switch to row-logging if
binlog_format=ROW.


mysql-test/extra/rpl_tests/rpl_row_func003.test:
  updated test case to ignore new warnings
mysql-test/suite/binlog/r/binlog_unsafe.result:
  updated result file
mysql-test/suite/binlog/t/binlog_unsafe.test:
  Added test for RAND().
  Also clarified some old comments.
mysql-test/suite/rpl/r/rpl_misc_functions.result:
  updated result file
mysql-test/suite/rpl/r/rpl_nondeterministic_functions.result:
  updated test case to ignore new warnings
mysql-test/suite/rpl/r/rpl_optimize.result:
  updated result file
mysql-test/suite/rpl/r/rpl_row_func003.result:
  updated result file
mysql-test/suite/rpl/t/rpl_misc_functions.test:
  updated test case to ignore new warnings
mysql-test/suite/rpl/t/rpl_nondeterministic_functions.test:
  updated test case to ignore new warnings
mysql-test/suite/rpl/t/rpl_optimize.test:
  updated test case to ignore new warnings
mysql-test/suite/rpl/t/rpl_trigger.test:
  updated test case to ignore new warnings
mysql-test/suite/rpl_ndb/r/rpl_ndb_func003.result:
  updated result file
sql/item_create.cc:
  Mark RAND() unsafe.
This commit is contained in:
Sven Sandberg
2010-01-13 10:00:03 +01:00
parent 71fd38e488
commit 4dc7be62a9
13 changed files with 55 additions and 11 deletions
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4
mysql-test/suite/rpl/t/rpl_nondeterministic_functions.test
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@ -17,6 +17,8 @@
--source include/master-slave.inc
CALL mtr.add_suppression('Statement may not be safe to log in statement format.');
CREATE TABLE t1 (a VARCHAR(1000));
# We replicate the connection_id in the query_log_event
@ -41,7 +43,9 @@ INSERT INTO t1 VALUES
(UTC_TIMESTAMP());
# We replicate the random seed in a rand_log_event
--disable_warnings
INSERT INTO t1 VALUES (RAND());
--enable_warnings
# We replicate the last_insert_id in an intvar_log_event
INSERT INTO t1 VALUES (LAST_INSERT_ID());