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Fixed bug mdev-10889

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The bug was in the code of the recursive method
With_element::check_unrestricted_recursive. For recursive
calls of this method sel->get_with_element()->owner != owner.
This commit is contained in:
Igor Babaev
2016-09-26 10:40:44 -07:00
parent 1f1990a161
commit b91bd822fa
3 changed files with 71 additions and 2 deletions
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37
mysql-test/r/cte_recursive.result
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@@ -1769,3 +1769,40 @@ WITH RECURSIVE cte(f) AS
SELECT * FROM cte as t;
f
DROP TABLE t1;
#
# MDEV-10889: mergeable derived in the spec of recursive CTE
#
create table t1 (a int);
insert into t1 values
(0), (1), (2), (3), (4);
create table t2 (a int);
insert into t2 values
(1), (2), (3), (4), (5);
with recursive
t1 as
(
select x.a from (select a from t2 where t2.a=3) x
union
select t2.a from t1,t2 where t1.a+1=t2.a
)
select * from t1;
a
3
4
5
explain
with recursive
t1 as
(
select x.a from (select a from t2 where t2.a=3) x
union
select t2.a from t1,t2 where t1.a+1=t2.a
)
select * from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 5
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where
4 RECURSIVE UNION <derived2> ALL NULL NULL NULL NULL 5
4 RECURSIVE UNION t2 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
NULL UNION RESULT <union2,4> ALL NULL NULL NULL NULL NULL
drop table t1,t2;