[MDEV-4311] Wrong result of COUNT(distinct) with low tmp_table_size / max_heap_table_size, part #2 - Jira

Details

Type: Bug
Status: Closed (View Workflow)
Priority: Major
Resolution: Fixed
Affects Version/s: 5.5.30
Fix Version/s: 5.5.31
Component/s: None
Labels:
None

Description

--source include/have_xtradb.inc

CREATE TABLE t1 (id INTEGER) ENGINE=InnoDB;

CREATE TABLE t2 (id INTEGER) ENGINE=InnoDB;

INSERT INTO t1 (id) VALUES (1), (1), (1),(1);

INSERT INTO t1 (id) SELECT id FROM t1;

INSERT INTO t1 (id) SELECT id FROM t1;

INSERT INTO t1 (id) SELECT id FROM t1;

INSERT INTO t1 (id) SELECT id FROM t1;

INSERT INTO t1 (id) SELECT id FROM t1;

INSERT INTO t1 SELECT id+1 FROM t1;

INSERT INTO t1 SELECT id+2 FROM t1;

INSERT INTO t1 SELECT id+4 FROM t1;

INSERT INTO t1 SELECT id+8 FROM t1;

INSERT INTO t1 SELECT id+16 FROM t1;

INSERT INTO t1 SELECT id+32 FROM t1;

INSERT INTO t1 SELECT id+64 FROM t1;

INSERT INTO t1 SELECT id+128 FROM t1;

INSERT INTO t1 SELECT id+256 FROM t1;

INSERT INTO t1 SELECT id+512 FROM t1;

INSERT INTO t1 SELECT id+1024 FROM t1;

INSERT INTO t1 SELECT id+2048 FROM t1;

INSERT INTO t1 SELECT id+4096 FROM t1;

INSERT INTO t1 SELECT id+8192 FROM t1;

INSERT INTO t2 SELECT id FROM t1 ORDER BY id*rand();

SET @tmp_table_size_saved = @@tmp_table_size;

SET @max_heap_table_size_saved = @@max_heap_table_size;

--echo # With default tmp_table_size / max_heap_table_size

SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

SET @@tmp_table_size=524288;

--echo # With reduced tmp_table_size

SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

SET @@tmp_table_size=@tmp_table_size_saved;

SET @@max_heap_table_size=524288;

--echo # With reduced max_heap_table_size

SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

SET @@max_heap_table_size=@max_heap_table_size_saved;

--echo # Back to default tmp_table_size / max_heap_table_size

SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

DROP TABLE t1, t2;

Results:

MariaDB [test]> --echo # With default tmp_table_size / max_heap_table_size

MariaDB [test]> SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

+-------+

| sm    |

+-------+

| 16384 |

+-------+

1 row in set (14.81 sec)

MariaDB [test]> SET @@tmp_table_size=524288;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> --echo # With reduced tmp_table_size

MariaDB [test]> SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

+----+

| sm |

+----+

|  0 |

+----+

1 row in set (14.85 sec)

MariaDB [test]> SET @@tmp_table_size=@tmp_table_size_saved;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> SET @@max_heap_table_size=524288;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> --echo # With reduced max_heap_table_size

MariaDB [test]> SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

+----+

| sm |

+----+

|  0 |

+----+

1 row in set (14.84 sec)

MariaDB [test]> SET @@max_heap_table_size=@max_heap_table_size_saved;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> --echo # Back to default tmp_table_size / max_heap_table_size

MariaDB [test]> SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

+-------+

| sm    |

+-------+

| 16384 |

+-------+

1 row in set (14.84 sec)

revision-id: sergii@pisem.net-20130317104125-yyp99euwpir5ueho

revno: 3700

branch-nick: 5.5

Please note that the test case (if used in MTR) contains have_xtradb. This is to exclude the InnoDB-plugin combination, since on some reason I'm getting the wrong result only with XtraDB. In the final test case it should be replaced with have_innodb as it's more universal.

Attachments

Issue Links

relates to

MDEV-4063 SUM(distinct) gives wrong result when reducing max_heap_table_size

Closed

Activity

Ascending order - Click to sort in descending order

Elena Stepanova created issue - 2013-03-21 12:56

Elena Stepanova made changes - 2013-03-21 12:56

Field	Original Value	New Value
Link		This issue relates to ~~MDEV-4063~~ [ ~~MDEV-4063~~ ]

Elena Stepanova made changes - 2013-03-21 13:00

Description

{code:sql}
--source include/have_xtradb.inc

CREATE TABLE t1 (id INTEGER) ENGINE=InnoDB;
CREATE TABLE t2 (id INTEGER) ENGINE=InnoDB;

INSERT INTO t1 (id) VALUES (1), (1), (1),(1);
INSERT INTO t1 (id) SELECT id FROM t1; /* 8 */
INSERT INTO t1 (id) SELECT id FROM t1; /* 12 */
INSERT INTO t1 (id) SELECT id FROM t1; /* 16 */
INSERT INTO t1 (id) SELECT id FROM t1; /* 20 */
INSERT INTO t1 (id) SELECT id FROM t1; /* 24 */
INSERT INTO t1 SELECT id+1 FROM t1;
INSERT INTO t1 SELECT id+2 FROM t1;
INSERT INTO t1 SELECT id+4 FROM t1;
INSERT INTO t1 SELECT id+8 FROM t1;
INSERT INTO t1 SELECT id+16 FROM t1;
INSERT INTO t1 SELECT id+32 FROM t1;
INSERT INTO t1 SELECT id+64 FROM t1;
INSERT INTO t1 SELECT id+128 FROM t1;
INSERT INTO t1 SELECT id+256 FROM t1;
INSERT INTO t1 SELECT id+512 FROM t1;
INSERT INTO t1 SELECT id+1024 FROM t1;
INSERT INTO t1 SELECT id+2048 FROM t1;
INSERT INTO t1 SELECT id+4096 FROM t1;
INSERT INTO t1 SELECT id+8192 FROM t1;

INSERT INTO t2 SELECT id FROM t1 ORDER BY id*rand();

SET @tmp_table_size_saved = @@tmp_table_size;
SET @max_heap_table_size_saved = @@max_heap_table_size;

--echo # With default tmp_table_size / max_heap_table_size
SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

SET @@tmp_table_size=524288;

--echo # With reduced tmp_table_size
SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

SET @@tmp_table_size=@tmp_table_size_saved;
SET @@max_heap_table_size=524288;

--echo # With reduced max_heap_table_size
SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

SET @@max_heap_table_size=@max_heap_table_size_saved;

--echo # Back to default tmp_table_size / max_heap_table_size
SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

DROP TABLE t1, t2;
{code}

Results:
{noformat}

MariaDB [test]> --echo # With default tmp_table_size / max_heap_table_size
MariaDB [test]> SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;
+-------+
| sm |
+-------+
| 16384 |
+-------+
1 row in set (14.81 sec)

MariaDB [test]> SET @@tmp_table_size=524288;
Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> --echo # With reduced tmp_table_size
MariaDB [test]> SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;
+----+
| sm |
+----+
| 0 |
+----+
1 row in set (14.85 sec)

MariaDB [test]> SET @@tmp_table_size=@tmp_table_size_saved;
Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> SET @@max_heap_table_size=524288;
Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> --echo # With reduced max_heap_table_size
MariaDB [test]> SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;
+----+
| sm |
+----+
| 0 |
+----+
1 row in set (14.84 sec)

MariaDB [test]> SET @@max_heap_table_size=@max_heap_table_size_saved;
Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> --echo # Back to default tmp_table_size / max_heap_table_size
MariaDB [test]> SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;
+-------+
| sm |
+-------+
| 16384 |
+-------+
1 row in set (14.84 sec)
{noformat}

{noformat}
revision-id: sergii@pisem.net-20130317104125-yyp99euwpir5ueho
revno: 3700
branch-nick: 5.5
{noformat}

_Please note that the test case (if used in MTR) contains have_xtradb. This is to exclude the InnoDB-plugin combination, since on some reason I'm getting the wrong result only with XtraDB. In the final test case it should be replaced with have_innodb as it's more universal._

{code:sql}
--source include/have_xtradb.inc

CREATE TABLE t1 (id INTEGER) ENGINE=InnoDB;
CREATE TABLE t2 (id INTEGER) ENGINE=InnoDB;

INSERT INTO t1 (id) VALUES (1), (1), (1),(1);
INSERT INTO t1 (id) SELECT id FROM t1;
INSERT INTO t1 (id) SELECT id FROM t1;
INSERT INTO t1 (id) SELECT id FROM t1;
INSERT INTO t1 (id) SELECT id FROM t1;
INSERT INTO t1 (id) SELECT id FROM t1;
INSERT INTO t1 SELECT id+1 FROM t1;
INSERT INTO t1 SELECT id+2 FROM t1;
INSERT INTO t1 SELECT id+4 FROM t1;
INSERT INTO t1 SELECT id+8 FROM t1;
INSERT INTO t1 SELECT id+16 FROM t1;
INSERT INTO t1 SELECT id+32 FROM t1;
INSERT INTO t1 SELECT id+64 FROM t1;
INSERT INTO t1 SELECT id+128 FROM t1;
INSERT INTO t1 SELECT id+256 FROM t1;
INSERT INTO t1 SELECT id+512 FROM t1;
INSERT INTO t1 SELECT id+1024 FROM t1;
INSERT INTO t1 SELECT id+2048 FROM t1;
INSERT INTO t1 SELECT id+4096 FROM t1;
INSERT INTO t1 SELECT id+8192 FROM t1;

INSERT INTO t2 SELECT id FROM t1 ORDER BY id*rand();

SET @tmp_table_size_saved = @@tmp_table_size;
SET @max_heap_table_size_saved = @@max_heap_table_size;

--echo # With default tmp_table_size / max_heap_table_size
SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

SET @@tmp_table_size=524288;

--echo # With reduced tmp_table_size
SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

SET @@tmp_table_size=@tmp_table_size_saved;
SET @@max_heap_table_size=524288;

--echo # With reduced max_heap_table_size
SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

SET @@max_heap_table_size=@max_heap_table_size_saved;

--echo # Back to default tmp_table_size / max_heap_table_size
SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;

DROP TABLE t1, t2;
{code}

Results:
{noformat}

MariaDB [test]> --echo # With default tmp_table_size / max_heap_table_size
MariaDB [test]> SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;
+-------+
| sm |
+-------+
| 16384 |
+-------+
1 row in set (14.81 sec)

MariaDB [test]> SET @@tmp_table_size=524288;
Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> --echo # With reduced tmp_table_size
MariaDB [test]> SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;
+----+
| sm |
+----+
| 0 |
+----+
1 row in set (14.85 sec)

MariaDB [test]> SET @@tmp_table_size=@tmp_table_size_saved;
Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> SET @@max_heap_table_size=524288;
Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> --echo # With reduced max_heap_table_size
MariaDB [test]> SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;
+----+
| sm |
+----+
| 0 |
+----+
1 row in set (14.84 sec)

MariaDB [test]> SET @@max_heap_table_size=@max_heap_table_size_saved;
Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> --echo # Back to default tmp_table_size / max_heap_table_size
MariaDB [test]> SELECT SQL_NO_CACHE count(DISTINCT id) sm FROM t2;
+-------+
| sm |
+-------+
| 16384 |
+-------+
1 row in set (14.84 sec)
{noformat}

{noformat}
revision-id: sergii@pisem.net-20130317104125-yyp99euwpir5ueho
revno: 3700
branch-nick: 5.5
{noformat}

_Please note that the test case (if used in MTR) contains have_xtradb. This is to exclude the InnoDB-plugin combination, since on some reason I'm getting the wrong result only with XtraDB. In the final test case it should be replaced with have_innodb as it's more universal._

Sergei Golubchik made changes - 2013-03-21 14:02

Assignee

Sergei Golubchik [ serg ]

Igor Babaev [ igor ]

Igor Babaev (Inactive) made changes - 2013-03-28 21:07

Resolution		Fixed [ 1 ]
Status	Open [ 1 ]	Closed [ 6 ]

Sergei Golubchik made changes - 2014-06-13 15:07

Workflow

defaullt [ 26725 ]

MariaDB v2 [ 46481 ]

Rasmus Johansson (Inactive) made changes - 2015-05-18 17:51

Workflow

MariaDB v2 [ 46481 ]

MariaDB v3 [ 67186 ]

Sergei Golubchik made changes - 2021-12-06 21:38

Workflow

MariaDB v3 [ 67186 ]

MariaDB v4 [ 146542 ]

People

Assignee:: Igor Babaev (Inactive)

Reporter:: Elena Stepanova

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Dates

Created:: 2013-03-21 12:56

Updated:: 2013-03-28 21:07

Resolved:: 2013-03-28 21:07

Git Integration

Error rendering 'com.xiplink.jira.git.jira_git_plugin:git-issue-webpanel'. Please contact your Jira administrators.

MariaDB Server

Details

Description

Attachments

Issue Links

Activity

People

Dates

Git Integration