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Bug #50192 Strange effect in replication test, trigger, auto_increment

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The auto-inc unsafe warning makes sense even though it's just
one auto-inc table could be involved via a trigger or a stored
function.
However its content was not updated by bug@45677 fixes continuing to mention
two tables whereas the fixes refined semantics of replication of auto_increment 
in stored routine.

Fixed with updating the error message, renaming the error and an internal unsafe-condition 
constants.

A documentation notice
======================

      Inserting into an autoincrement column in a stored function or a trigger
      is unsafe for replication.
      Even with just one autoincrement column, if the routine is invoked more than 
      once slave is not guaranteed to execute the statement graph same way as 
      the master.
      And since it's impossible to estimate how many times a routine can be invoked at 
      the query pre-execution phase (see lock_tables), the statement is marked
      pessimistically unsafe. 



mysql-test/suite/binlog/r/binlog_stm_unsafe_warning.result:
  results updated to include the expected unsafe warning.
mysql-test/suite/binlog/t/binlog_stm_unsafe_warning.test:
  regression test for bug#50192 to diplaying the unsafe warning comes out to the user warning stack.
sql/share/errmsg-utf8.txt:
  Updating the auto-inc unsafe message to correspond to bug@45677 fixes' new sematics.
sql/share/errmsg.txt:
  Updating the auto-inc unsafe message to correspond to bug@45677 fixes' new sematics.
sql/sql_base.cc:
  changing a symbolic name to correspond to updated by bug@45677 fixes new sematics.
sql/sql_lex.cc:
  changing a symbolic name to correspond to updated by bug@45677 fixes new sematics.
sql/sql_lex.h:
  changing a symbolic name to correspond to updated by bug@45677 fixes new sematics
  and description comments.
This commit is contained in:
Andrei Elkin
2010-01-29 15:55:35 +02:00
parent 827a0d7cb4
commit 8d240586b5
7 changed files with 73 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
mysql-test/suite/binlog/r/binlog_stm_unsafe_warning.result
View File

@ -1,5 +1,6 @@
call mtr.add_suppression("Unsafe statement binlogged in statement format since BINLOG_FORMAT = STATEMENT. Reason for unsafeness: Statement uses a LIMIT clause. This is unsafe because the set of rows included cannot be predicted. .*");
call mtr.add_suppression("Unsafe statement binlogged in statement format since BINLOG_FORMAT = STATEMENT. Reason for unsafeness: Statement uses a system function whose value may differ on slave. .*");
call mtr.add_suppression("Unsafe statement binlogged in statement format since BINLOG_FORMAT = STATEMENT. Reason for unsafeness: Statement invokes a trigger or a stored function that inserts into AUTO_INCREMENT column");
### NOT filtered database => assertion: warnings ARE shown
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a int, b int, primary key (a));
@ -50,3 +51,29 @@ SET GLOBAL log_warnings = @old_log_warnings;
# Count the number of times the "Unsafe" message was printed
# to the error log.
Occurrences: 1
DROP TABLE IF EXISTS t1, t2;
CREATE TABLE t1 (a int);
CREATE TABLE t2 (a int auto_increment primary key, b int);
CREATE TRIGGER tr_bug50192 AFTER INSERT ON t1 FOR EACH ROW INSERT INTO t2 (b) VALUES (1);
CREATE FUNCTION sf_bug50192() RETURNS INTEGER
BEGIN
INSERT INTO t2(b) VALUES(2);
RETURN 1;
END |
INSERT INTO t1 VALUES (0);
Warnings:
Note 1592 Unsafe statement binlogged in statement format since BINLOG_FORMAT = STATEMENT. Reason for unsafeness: Statement invokes a trigger or a stored function that inserts into AUTO_INCREMENT column which is unsafe to binlog in STATEMENT format because slave may execute it non-deterministically.
SHOW WARNINGS;
Level Code Message
Note 1592 Unsafe statement binlogged in statement format since BINLOG_FORMAT = STATEMENT. Reason for unsafeness: Statement invokes a trigger or a stored function that inserts into AUTO_INCREMENT column which is unsafe to binlog in STATEMENT format because slave may execute it non-deterministically.
SELECT sf_bug50192();
sf_bug50192()
1
Warnings:
Note 1592 Unsafe statement binlogged in statement format since BINLOG_FORMAT = STATEMENT. Reason for unsafeness: Statement invokes a trigger or a stored function that inserts into AUTO_INCREMENT column which is unsafe to binlog in STATEMENT format because slave may execute it non-deterministically.
SHOW WARNINGS;
Level Code Message
Note 1592 Unsafe statement binlogged in statement format since BINLOG_FORMAT = STATEMENT. Reason for unsafeness: Statement invokes a trigger or a stored function that inserts into AUTO_INCREMENT column which is unsafe to binlog in STATEMENT format because slave may execute it non-deterministically.
DROP FUNCTION sf_bug50192;
DROP TRIGGER tr_bug50192;
DROP TABLE t1, t2;