Edit File: min_null_cond.inc
--replace_column 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x EXPLAIN SELECT MIN( a ) FROM t1 WHERE a = NULL; SELECT MIN( a ) FROM t1 WHERE a = NULL; --replace_column 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x EXPLAIN SELECT MIN( a ) FROM t1 WHERE a <> NULL; SELECT MIN( a ) FROM t1 WHERE a <> NULL; --replace_column 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x EXPLAIN SELECT MIN( a ) FROM t1 WHERE a > NULL; SELECT MIN( a ) FROM t1 WHERE a > NULL; --replace_column 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x EXPLAIN SELECT MIN( a ) FROM t1 WHERE a < NULL; SELECT MIN( a ) FROM t1 WHERE a < NULL; if (!$skip_null_safe_test) { --replace_column 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x EXPLAIN SELECT MIN( a ) FROM t1 WHERE a <=> NULL; SELECT MIN( a ) FROM t1 WHERE a <=> NULL; } --replace_column 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x EXPLAIN SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND 10; SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND 10; --replace_column 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x EXPLAIN SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND NULL; SELECT MIN( a ) FROM t1 WHERE a BETWEEN NULL AND NULL; --replace_column 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x EXPLAIN SELECT MIN( a ) FROM t1 WHERE a BETWEEN 10 AND NULL; SELECT MIN( a ) FROM t1 WHERE a BETWEEN 10 AND NULL; --replace_column 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x EXPLAIN SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0); SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0); --replace_column 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x EXPLAIN SELECT MIN( a ) FROM t1 WHERE a IS NULL; SELECT MIN( a ) FROM t1 WHERE a IS NULL;
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