mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2026-05-15 19:37:16 +02:00
Code Issues Projects Releases Packages Wiki Activity

Automerge.

Browse source
This commit is contained in:
Alexey Kopytov 2009-09-08 12:36:40 +04:00
commit 0a7e41864c
3 changed files with 74 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

40
mysql-test/t/distinct.test
View file

@ -573,4 +573,44 @@ SELECT DISTINCT a, b, d, c FROM t1;
DROP TABLE t1;
--echo #
--echo # Bug #46159: simple query that never returns
--echo #
# Set max_heap_table_size to the minimum value so that GROUP BY table in the
# SELECT query below gets converted to MyISAM
SET @old_max_heap_table_size = @@max_heap_table_size;
SET @@max_heap_table_size = 16384;
# Set sort_buffer_size to the mininum value so that remove_duplicates() calls
# remove_dup_with_compare()
SET @old_sort_buffer_size = @@sort_buffer_size;
SET @@sort_buffer_size = 32804;
CREATE TABLE t1(c1 int, c2 VARCHAR(20));
INSERT INTO t1 VALUES (1, '1'), (1, '1'), (2, '2'), (3, '1'), (3, '1'), (4, '4');
# Now we just need to pad the table with random data so we have enough unique
# values to force conversion of the GROUP BY table to MyISAM
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
# First rows of the GROUP BY table that will be processed by
# remove_dup_with_compare()
SELECT c1, c2, COUNT(*) FROM t1 GROUP BY c1 LIMIT 4;
# The actual test case
SELECT DISTINCT c2 FROM t1 GROUP BY c1 HAVING COUNT(*) > 1;
# Cleanup
DROP TABLE t1;
SET @@sort_buffer_size = @old_sort_buffer_size;
SET @@max_heap_table_size = @old_max_heap_table_size;
--echo End of 5.1 tests