From 90b9c957ba6380a717aaef6285b3f1498f4a29dc Mon Sep 17 00:00:00 2001 From: Karthik Kamath Date: Wed, 18 May 2016 11:07:29 +0530 Subject: BUG#21142859: FUNCTION UPDATING A VIEW FAILS TO FIND TABLE THAT ACTUALLY EXISTS ANALYSIS: ========= Stored functions updating a view where the view table has a trigger defined that updates another table, fails reporting an error that the table doesn't exist. If there is a trigger defined on a table, a variable 'trg_event_map' will be set to a non-zero value after the parsed tree creation. This indicates what triggers we need to pre-load for the TABLE_LIST when opening an associated table. During the prelocking phase, the variable 'trg_event_map' will not be set for the view table. This value will be set after the processing of triggers defined on the table. During the processing of sub-statements, 'locked_tables_mode' will be set to 'LTM_PRELOCKED' which denotes that further locking of tables/functions cannot be done. This results in the other table not being locked and thus further processing results in an error getting reported. FIX: ==== During the prelocking of view, the value of 'trg_event_map' of the view is copied to 'trg_event_map' of the next table in the TABLE_LIST. This results in the locking of tables associated with the trigger as well. --- mysql-test/t/sp-prelocking.test | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'mysql-test/t/sp-prelocking.test') diff --git a/mysql-test/t/sp-prelocking.test b/mysql-test/t/sp-prelocking.test index 966c59a5789..c1378d59196 100644 --- a/mysql-test/t/sp-prelocking.test +++ b/mysql-test/t/sp-prelocking.test @@ -388,3 +388,29 @@ DROP TABLE t1, t2; --echo End of 5.0 tests +--echo # +--echo # Bug#21142859: FUNCTION UPDATING A VIEW FAILS TO FIND TABLE THAT ACTUALLY EXISTS +--echo # + +CREATE TABLE t1 SELECT 1 AS fld1, 'A' AS fld2; +CREATE TABLE t2 (fld3 INT, fld4 CHAR(1)); + +CREATE VIEW v1 AS SELECT * FROM t1; + +CREATE TRIGGER t1_au AFTER UPDATE ON t1 +FOR EACH ROW INSERT INTO t2 VALUES (new.fld1, new.fld2); + +DELIMITER !; +CREATE FUNCTION f1() RETURNS INT +BEGIN + UPDATE v1 SET fld2='B' WHERE fld1=1; + RETURN row_count(); +END ! +DELIMITER ;! + +--echo # Without the patch, an error was getting reported. +SELECT f1(); + +DROP FUNCTION f1; +DROP VIEW v1; +DROP TABLE t1,t2; -- cgit v1.2.1