mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2026-05-16 20:07:13 +02:00
Code Issues Projects Releases Packages Wiki Activity

Fixed LP bug #921167.

Browse source 
The fields ext_key_flags and ext_key_part_map must be initialized for any
key, even for a MyISAM key that never is considered by the optimizer as one
extended by hidden components.
This commit is contained in:
Igor Babaev 2012-01-24 23:34:02 -08:00
commit 51847a0fba
3 changed files with 87 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

47
mysql-test/r/innodb_ext_key.result
View file

@ -65,7 +65,7 @@ explain
select count(*) from lineitem
where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem const PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 12 const,const,const 1 Using index
1 SIMPLE lineitem const PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity PRIMARY 8 const,const 1
flush status;
select count(*) from lineitem
where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
@ -632,5 +632,50 @@ a b c
DROP VIEW v;
DROP TABLE t1,t2,t3;
set optimizer_switch=@save_optimizer_switch;
#
# LP Bug #921167: query containing IN subquery
# + extended_keys = on
#
CREATE TABLE t1 (
a int NOT NULL, b varchar(1) NOT NULL, KEY(a), KEY(b,a)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES
(0,'j'), (8,'v'), (1,'c'), (8,'m'), (9,'d'),
(24,'d'), (6,'y'), (1,'t'), (6,'d'), (2,'s');
CREATE TABLE t2 (
c int NOT NULL PRIMARY KEY
) ENGINE=MyISAM;
INSERT INTO t2 VALUES
(10), (11), (12), (13), (14),
(15), (16), (17), (18), (19), (24);
set @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch = 'extended_keys=off';
EXPLAIN
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t index a,b b 7 NULL 10 Using index
1 PRIMARY t1 ref b b 3 test.t.b 2 Using index; FirstMatch(t)
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t.a 1 Using index
1 PRIMARY t2 index NULL PRIMARY 4 NULL 11 Using index; FirstMatch(t2)
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
a
24
SET optimizer_switch = 'extended_keys=on';
EXPLAIN
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t index a,b b 7 NULL 10 Using index
1 PRIMARY t1 ref b b 3 test.t.b 2 Using index; FirstMatch(t)
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t.a 1 Using index
1 PRIMARY t2 index NULL PRIMARY 4 NULL 11 Using index; FirstMatch(t2)
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
a
24
set optimizer_switch=@save_optimizer_switch;
DROP TABLE t1,t2;
set optimizer_switch=@save_ext_key_optimizer_switch;
SET SESSION STORAGE_ENGINE=DEFAULT;