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mariadb/mysql-test/r/index_merge_innodb.result
Martin Hansson 30f57b3323 Bug#56423: Different count with SELECT and CREATE SELECT queries 
This is a regression from the fix for bug no 38999. A storage engine capable
of reading only a subset of a table's columns updates corresponding bits in
the read buffer to signal that it has read NULL values for the corresponding
columns. It cannot, and should not, update any other bits. Bug no 38999
occurred because the implementation of UPDATE statements compare the NULL bits
using memcmp, inadvertently comparing bits that were never requested from the
storage engine. The regression was caused by the storage engine trying to
alleviate the situation by writing to all NULL bits, even those that it had no
knowledge of. This has devastating effects for the index merge algorithm,
which relies on all NULL bits, except those explicitly requested, being left
unchanged.

The fix reverts the fix for bug no 38999 in both InnoDB and InnoDB plugin and
changes the server's method of comparing records. For engines that always read
entire rows, we proceed as usual. For engines capable of reading only select
columns, the record buffers are now compared on a column by column basis. An
assertion was also added so that non comparable buffers are never read. Some
relevant copy-pasted code was also consolidated in a new function.
2010-10-07 10:13:11 +02:00

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#---------------- 2-sweeps read Index merge test 2 -------------------------------
SET SESSION STORAGE_ENGINE = InnoDB;
drop table if exists t1;
create table t1 (
pk int primary key,
key1 int,
key2 int,
filler char(200),
filler2 char(200),
index(key1),
index(key2)
);
select * from t1 where (key1 >= 2 and key1 <= 10) or (pk >= 4 and pk <=8 );
pk key1 key2 filler filler2
2 2 2 filler-data filler-data-2
3 3 3 filler-data filler-data-2
9 9 9 filler-data filler-data-2
10 10 10 filler-data filler-data-2
4 4 4 filler-data filler-data-2
5 5 5 filler-data filler-data-2
6 6 6 filler-data filler-data-2
7 7 7 filler-data filler-data-2
8 8 8 filler-data filler-data-2
set @maxv=1000;
select * from t1 where
(pk < 5) or (pk > 10 and pk < 15) or (pk >= 50 and pk < 55 ) or (pk > @maxv-10)
or key1=18 or key1=60;
pk key1 key2 filler filler2
18 18 18 filler-data filler-data-2
60 60 60 filler-data filler-data-2
1 1 1 filler-data filler-data-2
2 2 2 filler-data filler-data-2
3 3 3 filler-data filler-data-2
4 4 4 filler-data filler-data-2
11 11 11 filler-data filler-data-2
12 12 12 filler-data filler-data-2
13 13 13 filler-data filler-data-2
14 14 14 filler-data filler-data-2
50 50 50 filler-data filler-data-2
51 51 51 filler-data filler-data-2
52 52 52 filler-data filler-data-2
53 53 53 filler-data filler-data-2
54 54 54 filler-data filler-data-2
991 991 991 filler-data filler-data-2
992 992 992 filler-data filler-data-2
993 993 993 filler-data filler-data-2
994 994 994 filler-data filler-data-2
995 995 995 filler-data filler-data-2
996 996 996 filler-data filler-data-2
997 997 997 filler-data filler-data-2
998 998 998 filler-data filler-data-2
999 999 999 filler-data filler-data-2
1000 1000 1000 filler-data filler-data-2
select * from t1 where
(pk < 5) or (pk > 10 and pk < 15) or (pk >= 50 and pk < 55 ) or (pk > @maxv-10)
or key1 < 3 or key1 > @maxv-11;
pk key1 key2 filler filler2
990 990 990 filler-data filler-data-2
1 1 1 filler-data filler-data-2
2 2 2 filler-data filler-data-2
3 3 3 filler-data filler-data-2
4 4 4 filler-data filler-data-2
11 11 11 filler-data filler-data-2
12 12 12 filler-data filler-data-2
13 13 13 filler-data filler-data-2
14 14 14 filler-data filler-data-2
50 50 50 filler-data filler-data-2
51 51 51 filler-data filler-data-2
52 52 52 filler-data filler-data-2
53 53 53 filler-data filler-data-2
54 54 54 filler-data filler-data-2
991 991 991 filler-data filler-data-2
992 992 992 filler-data filler-data-2
993 993 993 filler-data filler-data-2
994 994 994 filler-data filler-data-2
995 995 995 filler-data filler-data-2
996 996 996 filler-data filler-data-2
997 997 997 filler-data filler-data-2
998 998 998 filler-data filler-data-2
999 999 999 filler-data filler-data-2
1000 1000 1000 filler-data filler-data-2
select * from t1 where
(pk < 5) or (pk > 10 and pk < 15) or (pk >= 50 and pk < 55 ) or (pk > @maxv-10)
or
(key1 < 5) or (key1 > 10 and key1 < 15) or (key1 >= 50 and key1 < 55 ) or (key1 > @maxv-10);
pk key1 key2 filler filler2
1 1 1 filler-data filler-data-2
2 2 2 filler-data filler-data-2
3 3 3 filler-data filler-data-2
4 4 4 filler-data filler-data-2
11 11 11 filler-data filler-data-2
12 12 12 filler-data filler-data-2
13 13 13 filler-data filler-data-2
14 14 14 filler-data filler-data-2
50 50 50 filler-data filler-data-2
51 51 51 filler-data filler-data-2
52 52 52 filler-data filler-data-2
53 53 53 filler-data filler-data-2
54 54 54 filler-data filler-data-2
991 991 991 filler-data filler-data-2
992 992 992 filler-data filler-data-2
993 993 993 filler-data filler-data-2
994 994 994 filler-data filler-data-2
995 995 995 filler-data filler-data-2
996 996 996 filler-data filler-data-2
997 997 997 filler-data filler-data-2
998 998 998 filler-data filler-data-2
999 999 999 filler-data filler-data-2
1000 1000 1000 filler-data filler-data-2
select * from t1 where
(pk > 10 and pk < 15) or (pk >= 50 and pk < 55 )
or
(key1 < 5) or (key1 > @maxv-10);
pk key1 key2 filler filler2
1 1 1 filler-data filler-data-2
2 2 2 filler-data filler-data-2
3 3 3 filler-data filler-data-2
4 4 4 filler-data filler-data-2
991 991 991 filler-data filler-data-2
992 992 992 filler-data filler-data-2
993 993 993 filler-data filler-data-2
994 994 994 filler-data filler-data-2
995 995 995 filler-data filler-data-2
996 996 996 filler-data filler-data-2
997 997 997 filler-data filler-data-2
998 998 998 filler-data filler-data-2
999 999 999 filler-data filler-data-2
1000 1000 1000 filler-data filler-data-2
11 11 11 filler-data filler-data-2
12 12 12 filler-data filler-data-2
13 13 13 filler-data filler-data-2
14 14 14 filler-data filler-data-2
50 50 50 filler-data filler-data-2
51 51 51 filler-data filler-data-2
52 52 52 filler-data filler-data-2
53 53 53 filler-data filler-data-2
54 54 54 filler-data filler-data-2
drop table t1;
#---------------- Clustered PK ROR-index_merge tests -----------------------------
SET SESSION STORAGE_ENGINE = InnoDB;
drop table if exists t1;
create table t1
(
pk1 int not null,
pk2 int not null,
key1 int not null,
key2 int not null,
pktail1ok int not null,
pktail2ok int not null,
pktail3bad int not null,
pktail4bad int not null,
pktail5bad int not null,
pk2copy int not null,
badkey int not null,
filler1 char (200),
filler2 char (200),
key (key1),
key (key2),
/* keys with tails from CPK members */
key (pktail1ok, pk1),
key (pktail2ok, pk1, pk2),
key (pktail3bad, pk2, pk1),
key (pktail4bad, pk1, pk2copy),
key (pktail5bad, pk1, pk2, pk2copy),
primary key (pk1, pk2)
);
explain select * from t1 where pk1 = 1 and pk2 < 80 and key1=0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range PRIMARY,key1 PRIMARY 8 NULL 9 Using where
select * from t1 where pk1 = 1 and pk2 < 80 and key1=0;
pk1 pk2 key1 key2 pktail1ok pktail2ok pktail3bad pktail4bad pktail5bad pk2copy badkey filler1 filler2
1 10 0 0 0 0 0 0 0 10 0 filler-data-10 filler2
1 11 0 0 0 0 0 0 0 11 0 filler-data-11 filler2
1 12 0 0 0 0 0 0 0 12 0 filler-data-12 filler2
1 13 0 0 0 0 0 0 0 13 0 filler-data-13 filler2
1 14 0 0 0 0 0 0 0 14 0 filler-data-14 filler2
1 15 0 0 0 0 0 0 0 15 0 filler-data-15 filler2
1 16 0 0 0 0 0 0 0 16 0 filler-data-16 filler2
1 17 0 0 0 0 0 0 0 17 0 filler-data-17 filler2
1 18 0 0 0 0 0 0 0 18 0 filler-data-18 filler2
1 19 0 0 0 0 0 0 0 19 0 filler-data-19 filler2
explain select pk1,pk2 from t1 where key1 = 10 and key2=10 and 2*pk1+1 < 2*96+1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index_merge key1,key2 key1,key2 4,4 NULL 1 Using intersect(key1,key2); Using where; Using index
select pk1,pk2 from t1 where key1 = 10 and key2=10 and 2*pk1+1 < 2*96+1;
pk1 pk2
95 50
95 51
95 52
95 53
95 54
95 55
95 56
95 57
95 58
95 59
explain select * from t1 where badkey=1 and key1=10;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref key1 key1 4 const 100 Using where
explain select * from t1 where pk1 < 7500 and key1 = 10;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index_merge PRIMARY,key1 key1,PRIMARY 4,4 NULL ROWS Using intersect(key1,PRIMARY); Using where
explain select * from t1 where pktail1ok=1 and key1=10;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index_merge key1,pktail1ok key1,pktail1ok 4,4 NULL 1 Using intersect(key1,pktail1ok); Using where
explain select * from t1 where pktail2ok=1 and key1=10;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index_merge key1,pktail2ok key1,pktail2ok 4,4 NULL 1 Using intersect(key1,pktail2ok); Using where
explain select * from t1 where (pktail2ok=1 and pk1< 50000) or key1=10;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index_merge PRIMARY,key1,pktail2ok pktail2ok,key1 8,4 NULL 199 Using sort_union(pktail2ok,key1); Using where
explain select * from t1 where pktail3bad=1 and key1=10;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref key1,pktail3bad key1 4 const 100 Using where
explain select * from t1 where pktail4bad=1 and key1=10;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref key1,pktail4bad key1 4 const 100 Using where
explain select * from t1 where pktail5bad=1 and key1=10;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref key1,pktail5bad key1 4 const 100 Using where
explain select pk1,pk2,key1,key2 from t1 where key1 = 10 and key2=10 limit 10;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index_merge key1,key2 key1,key2 4,4 NULL 1 Using intersect(key1,key2); Using where; Using index
select pk1,pk2,key1,key2 from t1 where key1 = 10 and key2=10 limit 10;
pk1 pk2 key1 key2
95 50 10 10
95 51 10 10
95 52 10 10
95 53 10 10
95 54 10 10
95 55 10 10
95 56 10 10
95 57 10 10
95 58 10 10
95 59 10 10
drop table t1;
create table t1
(
RUNID varchar(22),
SUBMITNR varchar(5),
ORDERNR char(1),
PROGRAMM varchar(8),
TESTID varchar(4),
UCCHECK char(1),
ETEXT varchar(80),
ETEXT_TYPE char(1),
INFO char(1),
SEVERITY tinyint(3),
TADIRFLAG char(1),
PRIMARY KEY (RUNID,SUBMITNR,ORDERNR,PROGRAMM,TESTID,UCCHECK),
KEY `TVERM~KEY` (PROGRAMM,TESTID,UCCHECK)
) DEFAULT CHARSET=latin1;
update t1 set `ETEXT` = '', `ETEXT_TYPE`='', `INFO`='', `SEVERITY`='', `TADIRFLAG`=''
WHERE
`RUNID`= '' AND `SUBMITNR`= '' AND `ORDERNR`='' AND `PROGRAMM`='' AND
`TESTID`='' AND `UCCHECK`='';
drop table t1;
#
# Bug#50402 Optimizer producing wrong results when using Index Merge on InnoDB
#
CREATE TABLE t1 (f1 INT, PRIMARY KEY (f1));
INSERT INTO t1 VALUES (2);
CREATE TABLE t2 (f1 INT, f2 INT, f3 char(1),
PRIMARY KEY (f1), KEY (f2), KEY (f3) );
INSERT INTO t2 VALUES (1, 1, 'h'), (2, 3, 'h'), (3, 2, ''), (4, 2, '');
SELECT t1.f1 FROM t1
WHERE (SELECT COUNT(*) FROM t2 WHERE t2.f3 = 'h' AND t2.f2 = t1.f1) = 0 AND t1.f1 = 2;
f1
2
EXPLAIN SELECT t1.f1 FROM t1
WHERE (SELECT COUNT(*) FROM t2 WHERE t2.f3 = 'h' AND t2.f2 = t1.f1) = 0 AND t1.f1 = 2;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 const PRIMARY PRIMARY 4 const 1 Using index
2 DEPENDENT SUBQUERY t2 index_merge f2,f3 f3,f2 2,5 NULL 1 Using intersect(f3,f2); Using where; Using index
DROP TABLE t1,t2;
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