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Fixed max_key_length when using UNIQUE keys.

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This fixed a bug in GROUP BY on a BLOB column with NULL values.


myisam/mi_create.c:
  Fixed max_key_length when using UNIQUE keys.
myisam/mi_unique.c:
  Simple optimization
  Make different CRC for keys with null and empty strings.
mysql-test/r/group_by.result:
  Updated results
mysql-test/t/group_by.test:
  Test of bug
This commit is contained in:
unknown
2002-12-27 21:39:35 +02:00
parent 2261105194
commit d78c9adb55
4 changed files with 30 additions and 2 deletions
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8
mysql-test/r/group_by.result
View File

@ -102,3 +102,11 @@ pid c1id c2id value id active id active
1 4 NULL 4 4 Yes NULL NULL
max(value)
4
a count(*)
NULL 9
3
b 1
a count(*)
NULL 9
3
b 1

11
mysql-test/t/group_by.test
View File

@ -312,3 +312,14 @@ m.c1id = c1.id AND c1.active = 'Yes' LEFT JOIN t3 AS c2 ON m.c2id =
c2.id AND c2.active = 'Yes' WHERE m.pid=1 AND (c1.id IS NOT NULL OR c2.id IS
NOT NULL);
drop table t1,t2,t3;
#
# Test bug in GROUP BY on BLOB that is NULL or empty
#
create table t1 (a blob null);
insert into t1 values (NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(""),(""),(""),("b");
select a,count(*) from t1 group by a;
set option sql_big_tables=1;
select a,count(*) from t1 group by a;
drop table t1;