CREATE TABLE t2 (pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=LevelDB;

CREATE TABLE t1 (pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=LevelDB;

INSERT INTO t1 (pk) VALUES (NULL),(NULL);

BEGIN;

INSERT INTO t2 (pk) VALUES (NULL),(NULL);

INSERT INTO t1 (pk) VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL);

# We only have 8 rows in the table ...

SELECT * FROM t1 ORDER BY pk LIMIT 9;

pk

1

2

3

4

5

6

7

8

affected rows: 8

EXPLAIN EXTENDED

SELECT * FROM t1 ORDER BY pk LIMIT 9;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra

1	SIMPLE	t1	index	NULL	PRIMARY	4	NULL	9	11111.11	Using index

Warnings:

Note	1003	/* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` order by `test`.`t1`.`pk` limit 9

EXPLAIN EXTENDED

DELETE FROM t1 ORDER BY pk LIMIT 9;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra

1	SIMPLE	t1	index	PRIMARY	PRIMARY	4	NULL	9	100.00	NULL

# so all of them should be deleted....

DELETE FROM t1 ORDER BY pk LIMIT 9;

affected rows: 3

# but it does not happen:

SELECT * FROM t1 ORDER BY pk LIMIT 9;

pk

4

5

6

7

8

affected rows: 5

CREATE TABLE t2 (pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=LevelDB;

CREATE TABLE t1 (pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=LevelDB;

INSERT INTO t1 (pk) VALUES (NULL),(NULL);

BEGIN;

INSERT INTO t2 (pk) VALUES (NULL),(NULL);

INSERT INTO t1 (pk) VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL);

--enable_info

SELECT * FROM t1 ORDER BY pk LIMIT 9; 

DELETE FROM t1 ORDER BY pk LIMIT 9;

SELECT * FROM t1 ORDER BY pk LIMIT 9;

revision-id: psergey@askmonty.org-20130406172740-fid7u9tkz5ahlc4c

revno: 4823

branch-nick: mysql-5.6-leveldb