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BUG#19055: There may exist a SEL_TREE objects with type==KEY and keys[i]==NULL for any i.

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(for example, such objects can be returned from get_mm_parts() for "string_field = int_val).
Make find_used_partitions_imerge() to handle such SEL_TREE objects.


mysql-test/r/partition_pruning.result:
  BUG#19055: testcase
mysql-test/t/partition_pruning.test:
  BUG#19055: testcase
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2006-06-04 17:17:37 +04:00
parent 14e1d69aea
commit 6ccab8d4de
3 changed files with 26 additions and 3 deletions
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mysql-test/r/partition_pruning.result
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@ -670,3 +670,11 @@ select * from t1 where a like 'n%';
a
na
drop table t1;
create table t1 (s1 varchar(15)) partition by key (s1);
select * from t1 where s1 = 0 or s1 is null;
s1
insert into t1 values ('aa'),('bb'),('0');
explain partitions select * from t1 where s1 = 0 or s1 is null;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 3 Using where
drop table t1;