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ndb - fixed long overdue problems with unique indexes and null values

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This commit is contained in:
joreland@mysql.com
2004-11-30 07:41:26 +01:00
parent 74bfe72d3d
commit 474f23a402
3 changed files with 94 additions and 6 deletions
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36
mysql-test/r/ndb_index_unique.result
View File

@@ -522,3 +522,39 @@ uid gid rid cid
1 1 2 3
1 1 2 4
drop table t1,t2,t3,t4,t5,t6,t7;
CREATE TABLE t1 (
a int unsigned NOT NULL PRIMARY KEY,
b int unsigned,
c int unsigned,
UNIQUE bc(b,c) ) engine = ndb;
insert into t1 values(1,1,1),(2,NULL,2),(3,NULL,NULL),(4,4,NULL);
select * from t1 where b=1 and c=1;
a b c
1 1 1
select * from t1 where b is null and c is null;
a b c
3 NULL NULL
select * from t1 where b is null and c = 2;
a b c
2 NULL 2
select * from t1 where b = 4 and c is null;
a b c
4 4 NULL
create table t8 as
select * from t1 where (b = 1 and c = 1)
or (b is null and c is null)
or (b is null and c = 2)
or (b = 4 and c is null);
select * from t8 order by a;
a b c
1 1 1
2 NULL 2
3 NULL NULL
4 4 NULL
select * from t1 order by a;
a b c
1 1 1
2 NULL 2
3 NULL NULL
4 4 NULL
drop table t1, t8;

20
mysql-test/t/ndb_index_unique.test
View File

@@ -231,4 +231,24 @@ select * from t4 where rid = 2 order by cid;
drop table t1,t2,t3,t4,t5,t6,t7;
# test null in indexes
CREATE TABLE t1 (
a int unsigned NOT NULL PRIMARY KEY,
b int unsigned,
c int unsigned,
UNIQUE bc(b,c) ) engine = ndb;
insert into t1 values(1,1,1),(2,NULL,2),(3,NULL,NULL),(4,4,NULL);
select * from t1 where b=1 and c=1;
select * from t1 where b is null and c is null;
select * from t1 where b is null and c = 2;
select * from t1 where b = 4 and c is null;
create table t8 as
select * from t1 where (b = 1 and c = 1)
or (b is null and c is null)
or (b is null and c = 2)
or (b = 4 and c is null);
select * from t8 order by a;
select * from t1 order by a;
drop table t1, t8;