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#
# Bug #44139: Table scan when NULL appears in IN clause
#
CREATE TEMPORARY TABLE t1 (
c_int INT NOT NULL,
c_decimal DECIMAL(5,2) NOT NULL DEFAULT 0,
c_float DOUBLE NOT NULL DEFAULT 0,
c_datetime DATETIME NOT NULL DEFAULT '2009-04-12',
c_timestamp TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
c_char CHAR(10) NOT NULL DEFAULT '',
INDEX(c_int), INDEX(c_decimal), INDEX(c_float),
INDEX(c_datetime), INDEX(c_timestamp),
INDEX(c_char)) ENGINE=MYISAM;
INSERT INTO t1 (c_int) VALUES (1), (2), (3), (4), (5);
CREATE TABLE t2 AS SELECT * FROM t1;
INSERT INTO t1 (c_int) SELECT 0 FROM t2;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT * FROM t1;
INSERT INTO t1 (c_int) SELECT 0 FROM t2;
DROP TABLE t2;
EXPLAIN SELECT * FROM t1 WHERE c_int IN (1, 2, 3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_int c_int 4 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_int IN (NULL, 1, 2, 3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_int c_int 4 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_int IN (1, 2, 3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_int c_int 4 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_int IN (1, NULL, 2, NULL, 3, NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_int c_int 4 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_int IN (NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
EXPLAIN SELECT * FROM t1 WHERE c_int IN (NULL, NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
EXPLAIN SELECT * FROM t1 WHERE c_decimal IN (1, 2, 3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_decimal c_decimal 3 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_decimal IN (NULL, 1, 2, 3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_decimal c_decimal 3 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_decimal IN (NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
EXPLAIN SELECT * FROM t1 WHERE c_decimal IN (NULL, NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
EXPLAIN SELECT * FROM t1 WHERE c_float IN (1, 2, 3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_float c_float 8 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_float IN (NULL, 1, 2, 3);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_float c_float 8 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_float IN (NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
EXPLAIN SELECT * FROM t1 WHERE c_float IN (NULL, NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
EXPLAIN SELECT * FROM t1 WHERE c_datetime
IN ('2009-09-01 00:00:01', '2009-09-02 00:00:01', '2009-09-03 00:00:01');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_datetime c_datetime 8 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_datetime
IN (NULL, '2009-09-01 00:00:01', '2009-09-02 00:00:01', '2009-09-03 00:00:01');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_datetime c_datetime 8 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_datetime IN (NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
EXPLAIN SELECT * FROM t1 WHERE c_datetime IN (NULL, NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
EXPLAIN SELECT * FROM t1 WHERE c_timestamp
IN ('2009-09-01 00:00:01', '2009-09-01 00:00:02', '2009-09-01 00:00:03');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_timestamp c_timestamp 8 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_timestamp
IN (NULL, '2009-09-01 00:00:01', '2009-09-01 00:00:02', '2009-09-01 00:00:03');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_timestamp c_timestamp 8 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_timestamp IN (NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
EXPLAIN SELECT * FROM t1 WHERE c_timestamp IN (NULL, NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
EXPLAIN SELECT * FROM t1 WHERE c_char IN ('1', '2', '3');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_char c_char 42 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_char IN (NULL, '1', '2', '3');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c_char c_char 42 NULL 3 Using where
EXPLAIN SELECT * FROM t1 WHERE c_char IN (NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
EXPLAIN SELECT * FROM t1 WHERE c_char IN (NULL, NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
DROP TABLE t1;
#
End of 5.1 tests
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