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Bug #26162: Trigger DML ignores low_priority_updates setting

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The value of "low-priority-updates" option and the LOW PRIORITY
prefix was taken into account at parse time.
This caused triggers (among others) to ignore this flag (if
supplied for the DML statement).
Moved reading of the LOW_PRIORITY flag at run time.
Fixed an incosistency when handling
SET GLOBAL LOW_PRIORITY_UPDATES : now it is in effect for
delayed INSERTs.
Tested by checking the effect of LOW_PRIORITY flag via a 
trigger.


include/thr_lock.h:
  Bug #26162: moved reading of the LOW PRIORITY flag at run time
mysql-test/r/trigger.result:
  Bug #26162: test case
mysql-test/t/trigger.test:
  Bug #26162: test case
sql/set_var.cc:
  Bug #26162: fixed the handling of the "low-priority-updates" option
sql/sql_base.cc:
  Bug #26162: moved reading of the LOW PRIORITY flag at run time
sql/sql_yacc.yy:
  Bug #26162: moved reading of the LOW PRIORITY flag at run time
This commit is contained in:
unknown
2007-06-03 09:40:00 +03:00
parent d7a90fa172
commit f9a41f9f35
6 changed files with 102 additions and 7 deletions
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24
mysql-test/r/trigger.result
View File

@ -1449,4 +1449,28 @@ isave
1
2
drop table t1, t2, t3;
CREATE TABLE t1 (id INTEGER);
CREATE TABLE t2 (id INTEGER);
INSERT INTO t2 VALUES (1),(2);
CREATE TRIGGER t1_test AFTER INSERT ON t1 FOR EACH ROW
INSERT INTO t2 VALUES (new.id);
SELECT GET_LOCK('B26162',20);
GET_LOCK('B26162',20)
1
SELECT 'rl_acquirer', GET_LOCK('B26162',5), id FROM t2 WHERE id = 1;
SET SESSION LOW_PRIORITY_UPDATES=1;
SET GLOBAL LOW_PRIORITY_UPDATES=1;
INSERT INTO t1 VALUES (5);
SELECT 'rl_contender', id FROM t2 WHERE id > 1;
SELECT RELEASE_LOCK('B26162');
RELEASE_LOCK('B26162')
0
rl_acquirer GET_LOCK('B26162',5) id
rl_acquirer 0 1
rl_contender id
rl_contender 2
DROP TRIGGER t1_test;
DROP TABLE t1,t2;
SET SESSION LOW_PRIORITY_UPDATES=DEFAULT;
SET GLOBAL LOW_PRIORITY_UPDATES=DEFAULT;
End of 5.0 tests