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b2f8005094
******
This patch fixes the following bugs:
- Bug#5889: Exit handler for a warning doesn't hide the warning in
trigger
- Bug#9857: Stored procedures: handler for sqlwarning ignored
- Bug#23032: Handlers declared in a SP do not handle warnings generated
in sub-SP
- Bug#36185: Incorrect precedence for warning and exception handlers
The problem was in the way warnings/errors during stored routine execution
were handled. Prior to this patch the logic was as follows:
- when a warning/an error happens: if we're executing a stored routine,
and there is a handler for that warning/error, remember the handler,
ignore the warning/error and continue execution.
- after a stored routine instruction is executed: check for a remembered
handler and activate one (if any).
This logic caused several problems:
- if one instruction generates several warnings (errors) it's impossible
to choose the right handler -- a handler for the first generated
condition was chosen and remembered for activation.
- mess with handling conditions in scopes different from the current one.
- not putting generated warnings/errors into Warning Info (Diagnostic
Area) is against The Standard.
The patch changes the logic as follows:
- Diagnostic Area is cleared on the beginning of each statement that
either is able to generate warnings, or is able to work with tables.
- at the end of a stored routine instruction, Diagnostic Area is left
intact.
- Diagnostic Area is checked after each stored routine instruction. If
an instruction generates several condition, it's now possible to take a
look at all of them and determine an appropriate handler.
79 lines
1.9 KiB
Plaintext
79 lines
1.9 KiB
Plaintext
#
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# Bug #47412: Valgrind warnings / user can read uninitalized memory
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# using SP variables
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#
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CREATE SCHEMA testdb;
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USE testdb;
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CREATE FUNCTION f2 () RETURNS INTEGER
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BEGIN
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DECLARE CONTINUE HANDLER FOR SQLSTATE '42000' SET @aux = 1;
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RETURN f_not_exists () ;
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END|
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CREATE PROCEDURE p3 ( arg1 VARCHAR(32) )
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BEGIN
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CALL p_not_exists ( );
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END|
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# should not return valgrind warnings
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CALL p3 ( f2 () );
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ERROR 42000: PROCEDURE testdb.p_not_exists does not exist
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DROP SCHEMA testdb;
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CREATE SCHEMA testdb;
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USE testdb;
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CREATE FUNCTION f2 () RETURNS INTEGER
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BEGIN
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DECLARE CONTINUE HANDLER FOR SQLSTATE '42000' SET @aux = 1;
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RETURN f_not_exists () ;
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END|
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CREATE PROCEDURE p3 ( arg2 INTEGER )
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BEGIN
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CALL p_not_exists ( );
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END|
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# should not return valgrind warnings
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CALL p3 ( f2 () );
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ERROR 42000: PROCEDURE testdb.p_not_exists does not exist
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DROP SCHEMA testdb;
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CREATE SCHEMA testdb;
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USE testdb;
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CREATE FUNCTION f2 () RETURNS INTEGER
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BEGIN
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DECLARE CONTINUE HANDLER FOR SQLSTATE '42000' SET @aux = 1;
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RETURN f_not_exists () ;
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END|
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# should not return valgrind warnings
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SELECT f2 ();
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f2 ()
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NULL
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Warnings:
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Error 1305 FUNCTION testdb.f_not_exists does not exist
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DROP SCHEMA testdb;
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USE test;
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#
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# Bug#50423: Crash on second call of a procedure dropping a trigger
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#
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DROP TABLE IF EXISTS t1;
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DROP TRIGGER IF EXISTS tr1;
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DROP PROCEDURE IF EXISTS p1;
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CREATE TABLE t1 (f1 INTEGER);
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CREATE TRIGGER tr1 BEFORE INSERT ON t1 FOR EACH ROW SET @aux = 1;
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CREATE PROCEDURE p1 () DROP TRIGGER tr1;
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CALL p1 ();
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CALL p1 ();
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ERROR HY000: Trigger does not exist
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DROP TABLE t1;
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DROP PROCEDURE p1;
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#
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# Bug#50423: Crash on second call of a procedure dropping a trigger
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#
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DROP TABLE IF EXISTS t1;
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DROP TRIGGER IF EXISTS tr1;
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DROP PROCEDURE IF EXISTS p1;
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CREATE TABLE t1 (f1 INTEGER);
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CREATE TRIGGER tr1 BEFORE INSERT ON t1 FOR EACH ROW SET @aux = 1;
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CREATE PROCEDURE p1 () DROP TRIGGER tr1;
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CALL p1 ();
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CALL p1 ();
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ERROR HY000: Trigger does not exist
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DROP TABLE t1;
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DROP PROCEDURE p1;
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End of 5.1 tests
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