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fix for Bug#46897 'Test "index_merge_innodb" fails (mostly)':

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that was already analyzed by Oracle: EXPLAIN can return 3 or 4 in "rows"; using replace_column to work around this.
This commit is contained in:
Guilhem Bichot 2009-08-25 17:53:43 +02:00
parent fe4ae6b058
commit 0e8f2efa6e
3 changed files with 16 additions and 2 deletions
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8
mysql-test/include/index_merge2.inc
View File

@ -122,12 +122,20 @@ insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b)
analyze table t1;
select count(*) from t1;
if ($index_merge_random_rows_in_EXPLAIN)
{
--replace_column 9 #
}
explain select count(*) from t1 where
key1a = 2 and key1b is null and key2a = 2 and key2b is null;
select count(*) from t1 where
key1a = 2 and key1b is null and key2a = 2 and key2b is null;
if ($index_merge_random_rows_in_EXPLAIN)
{
--replace_column 9 #
}
explain select count(*) from t1 where
key1a = 2 and key1b is null and key3a = 2 and key3b is null;

4
mysql-test/r/index_merge_innodb.result
View File

@ -111,7 +111,7 @@ count(*)
explain select count(*) from t1 where
key1a = 2 and key1b is null and key2a = 2 and key2b is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index_merge i1,i2 i1,i2 10,10 NULL 4 Using intersect(i1,i2); Using where; Using index
1 SIMPLE t1 index_merge i1,i2 i1,i2 10,10 NULL # Using intersect(i1,i2); Using where; Using index
select count(*) from t1 where
key1a = 2 and key1b is null and key2a = 2 and key2b is null;
count(*)
@ -119,7 +119,7 @@ count(*)
explain select count(*) from t1 where
key1a = 2 and key1b is null and key3a = 2 and key3b is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index_merge i1,i3 i1,i3 10,10 NULL 4 Using intersect(i1,i3); Using where; Using index
1 SIMPLE t1 index_merge i1,i3 i1,i3 10,10 NULL # Using intersect(i1,i3); Using where; Using index
select count(*) from t1 where
key1a = 2 and key1b is null and key3a = 2 and key3b is null;
count(*)

6
mysql-test/t/index_merge_innodb.test
View File

@ -12,6 +12,12 @@
--source include/have_innodb.inc
let $engine_type= InnoDB;
# According to Oracle: "InnoDB's estimate for the index cardinality
# depends on a pseudo random number generator (it picks up random
# pages to sample). After an optimization that was made in r2625 two
# EXPLAINs started returning a different number of rows (3 instead of
# 4)", so:
let $index_merge_random_rows_in_EXPLAIN = 1;
# InnoDB does not support Merge tables (affects include/index_merge1.inc)
let $merge_table_support= 0;