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Fix for BUG#5401 (attempt 2)

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innobase/row/row0sel.c:
  Fix for BUG#5401: Don't reset the entire NULL mask, only set/clear bits for particular fields.
    This is necessary because index_merge ROR-intersection uses simulatenous scans on several keys
    with the same row buffer.
mysql-test/r/index_merge_innodb.result:
  Test for BUG#5401
mysql-test/t/index_merge_innodb.test:
  Test for BUG#5401
This commit is contained in:
unknown 2004-12-23 02:26:22 +03:00
commit 640287b3bf
3 changed files with 147 additions and 7 deletions
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68
mysql-test/t/index_merge_innodb.test
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@ -51,4 +51,72 @@ select * from t1 where key1 < 5 or key2 > 197;
explain select * from t1 where key1 < 3 or key2 > 195;
select * from t1 where key1 < 3 or key2 > 195;
# Test for BUG#5401
drop table t1;
create table t1 (
pk integer not null auto_increment primary key,
key1 integer,
key2 integer not null,
filler char (200),
index (key1),
index (key2)
) engine=innodb;
show warnings;
--disable_query_log
let $1=30;
while ($1)
{
eval insert into t1 (key1, key2, filler) values ($1/4, $1/8, 'filler-data');
dec $1;
}
--enable_query_log
explain select pk from t1 where key1 = 1 and key2 = 1;
select pk from t1 where key2 = 1 and key1 = 1;
select pk from t1 ignore index(key1,key2) where key2 = 1 and key1 = 1;
# More tests for BUG#5401.
drop table t1;
create table t1 (
pk int primary key auto_increment,
key1a int,
key2a int,
key1b int,
key2b int,
dummy1 int,
dummy2 int,
dummy3 int,
dummy4 int,
key3a int,
key3b int,
filler1 char (200),
index i1(key1a, key1b),
index i2(key2a, key2b),
index i3(key3a, key3b)
) engine=innodb;
create table t2 (a int);
insert into t2 values (0),(1),(2),(3),(4),(NULL);
insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b)
select A.a, B.a, C.a, D.a, C.a, D.a from t2 A,t2 B,t2 C, t2 D;
insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b)
select key1a, key1b, key2a, key2b, key3a, key3b from t1;
insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b)
select key1a, key1b, key2a, key2b, key3a, key3b from t1;
analyze table t1;
select count(*) from t1;
explain select count(*) from t1 where
key1a = 2 and key1b is null and key2a = 2 and key2b is null;
select count(*) from t1 where
key1a = 2 and key1b is null and key2a = 2 and key2b is null;
explain select count(*) from t1 where
key1a = 2 and key1b is null and key3a = 2 and key3b is null;
select count(*) from t1 where
key1a = 2 and key1b is null and key3a = 2 and key3b is null;
drop table t1,t2;