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DROP TABLE IF EXISTS t6; CREATE TABLE t6(c1 TINYINT UNSIGNED NULL); PREPARE stmt6 FROM 'INSERT INTO t6 (c1) VALUES(?)'; SET @a=NULL; EXECUTE stmt6 USING @a; SET @a=0; EXECUTE stmt6 USING @a; SET @a=255; EXECUTE stmt6 USING @a; SELECT * FROM t6; c1 0 255 NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 2 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 1 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 2 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'SELECT * FROM t6 WHERE c1 = ?'; SET @a=NULL; EXECUTE stmt6 USING @a; c1 SET @a=0; EXECUTE stmt6 USING @a; c1 0 SET @a=255; EXECUTE stmt6 USING @a; c1 255 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'UPDATE t6 SET c1 = ? WHERE c1 = ?'; SET @a=NULL; SET @b=0; EXECUTE stmt6 USING @a,@b; SET @a=0; SET @b=NULL; EXECUTE stmt6 USING @a,@b; SET @a=255; SET @a=201; EXECUTE stmt6 USING @a,@b; SELECT * FROM t6; c1 255 NULL NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 1 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 1 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 1 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'DELETE FROM t6 WHERE c1 = ?'; SET @a=NULL; EXECUTE stmt6 USING @a; SET @a=0; EXECUTE stmt6 USING @a; SET @a=255; EXECUTE stmt6 USING @a; SELECT * FROM t6; c1 NULL NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 0 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 0 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 0 DEALLOCATE PREPARE stmt6; DROP TABLE t6; CREATE TABLE t6(c1 SMALLINT UNSIGNED NULL); PREPARE stmt6 FROM 'INSERT INTO t6 (c1) VALUES(?)'; SET @a=NULL; EXECUTE stmt6 USING @a; SET @a=0; EXECUTE stmt6 USING @a; SET @a=255; EXECUTE stmt6 USING @a; SELECT * FROM t6; c1 0 255 NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 2 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 1 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 2 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'SELECT * FROM t6 WHERE c1 = ?'; SET @a=NULL; EXECUTE stmt6 USING @a; c1 SET @a=0; EXECUTE stmt6 USING @a; c1 0 SET @a=255; EXECUTE stmt6 USING @a; c1 255 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'UPDATE t6 SET c1 = ? WHERE c1 = ?'; SET @a=NULL; SET @b=0; EXECUTE stmt6 USING @a,@b; SET @a=0; SET @b=NULL; EXECUTE stmt6 USING @a,@b; SET @a=255; SET @a=201; EXECUTE stmt6 USING @a,@b; SELECT * FROM t6; c1 255 NULL NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 1 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 1 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 1 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'DELETE FROM t6 WHERE c1 = ?'; SET @a=NULL; EXECUTE stmt6 USING @a; SET @a=0; EXECUTE stmt6 USING @a; SET @a=255; EXECUTE stmt6 USING @a; SELECT * FROM t6; c1 NULL NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 0 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 0 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 0 DEALLOCATE PREPARE stmt6; DROP TABLE t6; CREATE TABLE t6(c1 MEDIUMINT UNSIGNED NULL); PREPARE stmt6 FROM 'INSERT INTO t6 (c1) VALUES(?)'; SET @a=NULL; EXECUTE stmt6 USING @a; SET @a=0; EXECUTE stmt6 USING @a; SET @a=255; EXECUTE stmt6 USING @a; SELECT * FROM t6; c1 0 255 NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 2 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 1 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 2 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'SELECT * FROM t6 WHERE c1 = ?'; SET @a=NULL; EXECUTE stmt6 USING @a; c1 SET @a=0; EXECUTE stmt6 USING @a; c1 0 SET @a=255; EXECUTE stmt6 USING @a; c1 255 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'UPDATE t6 SET c1 = ? WHERE c1 = ?'; SET @a=NULL; SET @b=0; EXECUTE stmt6 USING @a,@b; SET @a=0; SET @b=NULL; EXECUTE stmt6 USING @a,@b; SET @a=255; SET @a=201; EXECUTE stmt6 USING @a,@b; SELECT * FROM t6; c1 255 NULL NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 1 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 1 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 1 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'DELETE FROM t6 WHERE c1 = ?'; SET @a=NULL; EXECUTE stmt6 USING @a; SET @a=0; EXECUTE stmt6 USING @a; SET @a=255; EXECUTE stmt6 USING @a; SELECT * FROM t6; c1 NULL NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 0 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 0 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 0 DEALLOCATE PREPARE stmt6; DROP TABLE t6; CREATE TABLE t6(c1 INT UNSIGNED NULL); PREPARE stmt6 FROM 'INSERT INTO t6 (c1) VALUES(?)'; SET @a=NULL; EXECUTE stmt6 USING @a; SET @a=0; EXECUTE stmt6 USING @a; SET @a=255; EXECUTE stmt6 USING @a; SELECT * FROM t6; c1 0 255 NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 2 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 1 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 2 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'SELECT * FROM t6 WHERE c1 = ?'; SET @a=NULL; EXECUTE stmt6 USING @a; c1 SET @a=0; EXECUTE stmt6 USING @a; c1 0 SET @a=255; EXECUTE stmt6 USING @a; c1 255 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'UPDATE t6 SET c1 = ? WHERE c1 = ?'; SET @a=NULL; SET @b=0; EXECUTE stmt6 USING @a,@b; SET @a=0; SET @b=NULL; EXECUTE stmt6 USING @a,@b; SET @a=255; SET @a=201; EXECUTE stmt6 USING @a,@b; SELECT * FROM t6; c1 255 NULL NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 1 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 1 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 1 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'DELETE FROM t6 WHERE c1 = ?'; SET @a=NULL; EXECUTE stmt6 USING @a; SET @a=0; EXECUTE stmt6 USING @a; SET @a=255; EXECUTE stmt6 USING @a; SELECT * FROM t6; c1 NULL NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 0 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 0 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 0 DEALLOCATE PREPARE stmt6; DROP TABLE t6; CREATE TABLE t6(c1 INTEGER UNSIGNED NULL); PREPARE stmt6 FROM 'INSERT INTO t6 (c1) VALUES(?)'; SET @a=NULL; EXECUTE stmt6 USING @a; SET @a=0; EXECUTE stmt6 USING @a; SET @a=255; EXECUTE stmt6 USING @a; SELECT * FROM t6; c1 0 255 NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 2 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 1 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 2 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'SELECT * FROM t6 WHERE c1 = ?'; SET @a=NULL; EXECUTE stmt6 USING @a; c1 SET @a=0; EXECUTE stmt6 USING @a; c1 0 SET @a=255; EXECUTE stmt6 USING @a; c1 255 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'UPDATE t6 SET c1 = ? WHERE c1 = ?'; SET @a=NULL; SET @b=0; EXECUTE stmt6 USING @a,@b; SET @a=0; SET @b=NULL; EXECUTE stmt6 USING @a,@b; SET @a=255; SET @a=201; EXECUTE stmt6 USING @a,@b; SELECT * FROM t6; c1 255 NULL NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 1 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 1 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 1 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'DELETE FROM t6 WHERE c1 = ?'; SET @a=NULL; EXECUTE stmt6 USING @a; SET @a=0; EXECUTE stmt6 USING @a; SET @a=255; EXECUTE stmt6 USING @a; SELECT * FROM t6; c1 NULL NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 0 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 0 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 0 DEALLOCATE PREPARE stmt6; DROP TABLE t6; CREATE TABLE t6(c1 BIGINT UNSIGNED NULL); PREPARE stmt6 FROM 'INSERT INTO t6 (c1) VALUES(?)'; SET @a=NULL; EXECUTE stmt6 USING @a; SET @a=0; EXECUTE stmt6 USING @a; SET @a=255; EXECUTE stmt6 USING @a; SELECT * FROM t6; c1 0 255 NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 2 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 1 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 2 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'SELECT * FROM t6 WHERE c1 = ?'; SET @a=NULL; EXECUTE stmt6 USING @a; c1 SET @a=0; EXECUTE stmt6 USING @a; c1 0 SET @a=255; EXECUTE stmt6 USING @a; c1 255 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'UPDATE t6 SET c1 = ? WHERE c1 = ?'; SET @a=NULL; SET @b=0; EXECUTE stmt6 USING @a,@b; SET @a=0; SET @b=NULL; EXECUTE stmt6 USING @a,@b; SET @a=255; SET @a=201; EXECUTE stmt6 USING @a,@b; SELECT * FROM t6; c1 255 NULL NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 1 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 1 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 1 DEALLOCATE PREPARE stmt6; PREPARE stmt6 FROM 'DELETE FROM t6 WHERE c1 = ?'; SET @a=NULL; EXECUTE stmt6 USING @a; SET @a=0; EXECUTE stmt6 USING @a; SET @a=255; EXECUTE stmt6 USING @a; SELECT * FROM t6; c1 NULL NULL SELECT COUNT(c1) AS total_rows FROM t6; total_rows 0 SELECT COUNT(c1) AS positive_rows FROM t6 WHERE c1 > 0; positive_rows 0 SELECT COUNT(c1) AS null_rows FROM t6 WHERE c1 IS NULL; null_rows 0 SELECT COUNT(c1) AS not_null_rows FROM t6 WHERE c1 IS NOT NULL; not_null_rows 0 DEALLOCATE PREPARE stmt6; DROP TABLE t6;