count_distinct3.test

来自「这是linux下运行的mysql软件包,可用于linux 下安装 php + m」· TEST 代码 · 共 61 行

#
# this is a test for error 1032 in count(distinct) + group by, introduced in 
# mysql-4.1
#

--disable_warnings
DROP TABLE IF EXISTS t1, t2;
--enable_warnings

CREATE TABLE t1 (id INTEGER, grp TINYINT, id_rev INTEGER);

--disable_query_log
SET @rnd_max= 2147483647;
let $1 = 1000;
while ($1)
{
  SET @rnd= RAND();
  SET @id = CAST(@rnd * @rnd_max AS UNSIGNED);
  SET @id_rev= @rnd_max - @id;
  SET @grp= CAST(127.0 * @rnd AS UNSIGNED); 
  INSERT INTO t1 (id, grp, id_rev) VALUES (@id, @grp, @id_rev); 
  dec $1;
}
set @@read_buffer_size=2*1024*1024;
CREATE TABLE t2 SELECT * FROM t1;
INSERT INTO t1 (id, grp, id_rev) SELECT id, grp, id_rev FROM t2;
INSERT INTO t2 (id, grp, id_rev) SELECT id, grp, id_rev FROM t1;
INSERT INTO t1 (id, grp, id_rev) SELECT id, grp, id_rev FROM t2;
INSERT INTO t2 (id, grp, id_rev) SELECT id, grp, id_rev FROM t1;
INSERT INTO t1 (id, grp, id_rev) SELECT id, grp, id_rev FROM t2;
INSERT INTO t2 (id, grp, id_rev) SELECT id, grp, id_rev FROM t1;
INSERT INTO t1 (id, grp, id_rev) SELECT id, grp, id_rev FROM t2;
INSERT INTO t2 (id, grp, id_rev) SELECT id, grp, id_rev FROM t1;
INSERT INTO t1 (id, grp, id_rev) SELECT id, grp, id_rev FROM t2;
INSERT INTO t2 (id, grp, id_rev) SELECT id, grp, id_rev FROM t1;
INSERT INTO t1 (id, grp, id_rev) SELECT id, grp, id_rev FROM t2;
INSERT INTO t2 (id, grp, id_rev) SELECT id, grp, id_rev FROM t1;
INSERT INTO t1 (id, grp, id_rev) SELECT id, grp, id_rev FROM t2;
INSERT INTO t2 (id, grp, id_rev) SELECT id, grp, id_rev FROM t1;
INSERT INTO t1 (id, grp, id_rev) SELECT id, grp, id_rev FROM t2;
INSERT INTO t2 (id, grp, id_rev) SELECT id, grp, id_rev FROM t1;
INSERT INTO t1 (id, grp, id_rev) SELECT id, grp, id_rev FROM t2;
INSERT INTO t2 (id, grp, id_rev) SELECT id, grp, id_rev FROM t1;
DROP TABLE t2;
--enable_query_log

SELECT COUNT(*) FROM t1;

# As t1 contains random numbers, results are different from test to test. 
# That's okay, because we test only that select doesn't yield an
# error. Note, that --disable_result_log doesn't suppress error output.

--disable_result_log
SELECT COUNT(DISTINCT id) FROM t1 GROUP BY grp;
--enable_result_log
DROP TABLE t1;

set @@read_buffer_size=default;

# End of 4.1 tests