Wrong result with join_cache_level + index_condition_pushdown
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
MariaDB |
Fix Released
|
Critical
|
Igor Babaev |
Bug Description
If the following query is executed with join_cache_level=1 and index_condition
Query:
SELECT f2 FROM t2
JOIN t1 FORCE KEY (PRIMARY) ON t1.f1 = t2.f4
WHERE t2.f3
AND t2.f3 <= 4
AND t1.f3 IN ( 2 , 1 )
OR t1.f3 > 1
AND t1.f3 < 5
AND t2.f3 BETWEEN 6 AND 6 ;
explain:
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 1 100.00 Using index condition; Using MRR
1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; Using join buffer (flat, BNL join)
test case:
CREATE TABLE t1 (f1 varchar(10), f3 int(11), PRIMARY KEY (f3)) ;
INSERT IGNORE INTO t1 VALUES ('y',1),('or',5);
CREATE TABLE t2 (f3 int(11), f2 varchar(1024), f4 varchar(10), PRIMARY KEY (f3)) ;
INSERT IGNORE INTO t2 VALUES (6,'RPOYT'
SELECT f2 FROM t2 JOIN t1 FORCE KEY (PRIMARY) ON t1.f1 = t2.f4 WHERE t2.f3 AND t2.f3 <= 4 AND t1.f3 IN ( 2 , 1 ) OR t1.f3 > 1 AND t1.f3 < 5 AND t2.f3 BETWEEN 6 AND 6 ;
maria-5.3 , maria-5.3-wl128 and maria-5.
Changed in maria: | |
status: | New → Confirmed |
importance: | Undecided → Critical |
Changed in maria: | |
assignee: | nobody → Igor Babaev (igorb-seattle) |
status: | Confirmed → In Progress |
Changed in maria: | |
status: | In Progress → Fix Committed |
Changed in maria: | |
status: | Fix Committed → Fix Released |
Maria-5.2 is not affected, so this is a regression.