77
77
EXPLAIN SELECT * FROM t1 WHERE c_timestamp
78
78
IN ('2009-09-01 00:00:01', '2009-09-01 00:00:02', '2009-09-01 00:00:03');
79
79
id select_type table type possible_keys key key_len ref rows Extra
81
81
EXPLAIN SELECT * FROM t1 WHERE c_timestamp
82
82
IN (NULL, '2009-09-01 00:00:01', '2009-09-01 00:00:02', '2009-09-01 00:00:03');
83
83
id select_type table type possible_keys key key_len ref rows Extra
85
85
EXPLAIN SELECT * FROM t1 WHERE c_timestamp IN (NULL);
86
86
id select_type table type possible_keys key key_len ref rows Extra
87
87
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables