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MDEV-21673 Calling stored procedure twice in the same session causes MariaDB to crash

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This bug could happen only with a stored procedure containing queries with
more than one reference to a CTE that used local variables / parameters.

This bug was the result of an incomplete merge of the fix for the bug
MDEV-17154. The merge covered usage of parameter markers occurred in a CTE
that was referenced more than once, but missed coverage of local variables.
This commit is contained in:
Igor Babaev
2020-04-04 09:24:22 -07:00
parent fbef428645
commit 21b8743734
3 changed files with 219 additions and 4 deletions
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103
mysql-test/main/cte_nonrecursive.test
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@ -1202,3 +1202,106 @@ DROP TABLE test.t;
--disconnect con1
--echo # End of 10.2 tests
--echo #
--echo # MDEV-21673: several references to CTE that uses
--echo # local variables / parameters of SP
--echo #
CREATE TABLE t1 (col1 int);
CREATE TABLE t2 (col1 int, col2 date, col3 varchar(16), col4 int);
CREATE TABLE t3 (col1 int, col2 date);
CREATE TABLE t4 (col1 int, col2 date);
INSERT INTO t1 VALUES (3), (7), (9), (1);
INSERT INTO t2 VALUES
(3,'2019-09-01','AAA',2), (7,'2019-10-01','AAA',4), (3,'2019-10-01','AAA',8),
(1,'2019-10-01','BBB',9), (1,'2019-10-01','AAA',4), (1,'2019-10-01','AAA',6);
INSERT INTO t3 VALUES
(4,'2018-10-01'), (6,'2018-10-01'), (4,'2017-10-01'), (7,'2017-10-01');
INSERT INTO t4 VALUES
(5,'2018-10-01'), (8,'2017-10-01'), (4,'2017-10-01');
DELIMITER |;
CREATE OR REPLACE PROCEDURE SP1()
BEGIN
DECLARE p_date date;
DECLARE p_var2 varchar(16);
SET p_date='2019-10-01';
SET p_var2='AAA';
WITH cte_first(col) AS
(
SELECT DISTINCT col4
FROM t1, t2
WHERE t2.col1 = t1.col1 AND t2.col2 = p_date AND t2.col3 = p_var2
),
cte2 AS
(
SELECT DISTINCT col2
FROM t3
WHERE col1 IN ( SELECT col FROM cte_first )
),
cte3 AS (
SELECT distinct t4.col1
FROM cte2, t4
WHERE t4.col2 = cte2.col2 AND t4.col1 IN ( SELECT col FROM cte_first )
)
SELECT * FROM cte3;
END|
CREATE PROCEDURE SP2(IN d date)
BEGIN
DECLARE p_var2 varchar(16);
SET p_var2='AAA';
WITH cte_first(col) AS
(
SELECT DISTINCT col4
FROM t1, t2
WHERE t2.col1 = t1.col1 AND t2.col2 = d AND t2.col3 = p_var2
),
cte2 AS
(
SELECT DISTINCT col2
FROM t3
WHERE col1 IN ( SELECT col FROM cte_first )
),
cte3 AS (
SELECT distinct t4.col1
FROM cte2, t4
WHERE t4.col2 = cte2.col2 AND t4.col1 IN ( SELECT col FROM cte_first )
)
SELECT * FROM cte3;
END|
DELIMITER ;|
CREATE TABLE t AS
SELECT col4 AS col
FROM t1, t2
WHERE t2.col1 = t1.col1 AND t2.col2 ='2019-10-01' AND t2.col3 = 'AAA';
SELECT * FROM t;
CREATE TABLE tt AS
SELECT col2
FROM t3
WHERE col1 IN ( SELECT col FROM t );
SELECT * FROM tt;
SELECT t4.col1
FROM tt, t4
WHERE t4.col2 = tt.col2 AND t4.col1 IN ( SELECT col FROM t );
DROP TABLE t,tt;
CALL SP1();
CALL SP1();
CALL SP2('2019-10-01');
CALL SP2('2019-10-01');
DROP PROCEDURE SP1;
DROP PROCEDURE SP2;
DROP TABLE t1,t2,t3,t4;
--echo # End of 10.3 tests