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DROP TABLE IF EXISTS t1_select;
DROP TABLE IF EXISTS t1_aux;
DROP TABLE IF EXISTS t1_not_null;
DROP VIEW IF EXISTS v1_not_null;
DROP VIEW IF EXISTS v1_func;
DROP TABLE IF EXISTS t1_fail;
DROP FUNCTION IF EXISTS f1_simple_insert;
DROP FUNCTION IF EXISTS f1_two_inserts;
DROP FUNCTION IF EXISTS f1_insert_select;
SET SESSION AUTOCOMMIT=0;
SET SESSION sql_mode = '';
CREATE TABLE t1_select (f1 BIGINT, f2 BIGINT) ENGINE = MEMORY;
INSERT INTO t1_select(f1,f2) VALUES (1,-1),(2,NULL),(3,0),(4,1),(5,2);
SELECT * FROM t1_select;
f1 f2
1 -1
2 NULL
3 0
4 1
5 2
CREATE TABLE t1_not_null (f1 BIGINT, f2 BIGINT NOT NULL)
ENGINE = <transactional_engine>;
SELECT * FROM t1_not_null;
f1 f2
CREATE TABLE t1_aux (f1 BIGINT, f2 BIGINT)
ENGINE = <transactional_engine>;
SELECT * FROM t1_aux;
f1 f2
COMMIT;
CREATE FUNCTION f1_simple_insert(my_f1 INTEGER) RETURNS INTEGER
BEGIN
INSERT INTO t1_not_null SET f1 = 10, f2 = my_f1;
RETURN 1;
END//
# One f1_simple_insert execution per row, no NOT NULL violation
SELECT f1_simple_insert(1);
f1_simple_insert(1)
1
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
10 1
ROLLBACK;
SELECT * FROM t1_not_null;
f1 f2
SELECT f1_simple_insert(1) FROM t1_select;
f1_simple_insert(1)
1
1
1
1
1
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
10 1
10 1
10 1
10 1
10 1
ROLLBACK;
SELECT * FROM t1_not_null;
f1 f2
# One f1_simple_insert execution per row, NOT NULL violation when the
# SELECT processes the first row.
SELECT f1_simple_insert(NULL);
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT f1_simple_insert(NULL) FROM t1_select;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT 1 FROM (SELECT 1 AS f1,1 AS f2 UNION ALL SELECT 1,NULL) AS t1 WHERE f1_simple_insert(NULL) = 1;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
# One f1_simple_insert execution per row, NOT NULL violation when the
# SELECT processes the non first row
SELECT f1_simple_insert(f2) FROM (SELECT 1 AS f1,1 AS f2 UNION ALL SELECT 1,NULL) AS t1;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT f1_simple_insert(f2) FROM t1_select;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
# Two f1_simple_insert executions per row, NOT NULL violation when the
# SELECT processes the first row.
SELECT f1_simple_insert(1),f1_simple_insert(NULL);
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT f1_simple_insert(NULL),f1_simple_insert(1);
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
# Two f1_simple_insert executions per row, NOT NULL violation when the
# SELECT processes the non first row
SELECT f1_simple_insert(f1),f1_simple_insert(f2) FROM (SELECT 1 AS f1,1 AS f2 UNION ALL SELECT 1,NULL) AS t1;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT f1_simple_insert(f2),f1_simple_insert(f1) FROM (SELECT 1 AS f1,1 AS f2 UNION ALL SELECT 1,NULL) AS t1;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT f1_simple_insert(f1),f1_simple_insert(f2) FROM t1_select;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT f1_simple_insert(f2),f1_simple_insert(f1) FROM t1_select;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT 1 FROM (SELECT 1 AS f1,1 AS f2 UNION ALL SELECT 1,NULL) AS t1
WHERE 1 = f1_simple_insert(f2) AND 1 = f1_simple_insert(f1);
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
# Nested functions, the inner fails
SELECT f1_simple_insert(f1_simple_insert(NULL)) FROM t1_select;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
# Nested functions, the outer fails
SELECT f1_simple_insert(f1_simple_insert(1) + NULL) FROM t1_select;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
DROP FUNCTION f1_simple_insert;
CREATE FUNCTION f1_insert_select(my_f1 INTEGER) RETURNS INTEGER
BEGIN
INSERT INTO t1_not_null SELECT * FROM t1_select WHERE f1 = my_f1;
RETURN 1;
END;
# f1_insert_select(2), tries to INSERT SELECT one row containing NULL
# The fact that
# - SELECT f1_insert_select(2); gives any result set and
# - t1_not_null gets a row inserted
# is covered by the manual.
SELECT f1_insert_select(2);
f1_insert_select(2)
1
Warnings:
Warning 1048 Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
2 0
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
DROP FUNCTION f1_insert_select;
SET SESSION sql_mode = 'traditional';
CREATE FUNCTION f1_insert_select(my_f1 INTEGER) RETURNS INTEGER
BEGIN
INSERT INTO t1_not_null SELECT * FROM t1_select WHERE f1 = my_f1;
RETURN 1;
END;
SELECT f1_insert_select(2);
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
DROP FUNCTION f1_insert_select;
SET SESSION sql_mode = '';
# Function tries to
# 1. INSERT statement: Insert one row with NULL -> NOT NULL violation
# 2. INSERT statement: Insert one row without NULL
CREATE FUNCTION f1_two_inserts() RETURNS INTEGER
BEGIN
INSERT INTO t1_not_null SET f1 = 10, f2 = NULL;
INSERT INTO t1_not_null SET f1 = 10, f2 = 10;
RETURN 1;
END//
SELECT f1_two_inserts();
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
DROP FUNCTION f1_two_inserts;
# Function tries to
# 1. INSERT statement: Insert one row without NULL
# 2. INSERT statement: Insert one row with NULL -> NOT NULL violation
CREATE FUNCTION f1_two_inserts() RETURNS INTEGER
BEGIN
INSERT INTO t1_not_null SET f1 = 10, f2 = 10;
INSERT INTO t1_not_null SET f1 = 10, f2 = NULL;
RETURN 1;
END//
SELECT f1_two_inserts();
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
# Function tries to
# INSERT statement: Insert two rows
# first row without NULL
# second row with NULL -> NOT NULL violation
# -> NOT NULL violation
CREATE FUNCTION f1_insert_with_two_rows() RETURNS INTEGER
BEGIN
INSERT INTO t1_not_null(f1,f2) VALUES (10,10),(10,NULL);
RETURN 1;
END;
# The fact that
# - SELECT f1_insert_with_two_rows(); gives any result set and
# - t1_not_null gets a row inserted
# is covered by the manual.
SELECT f1_insert_with_two_rows();
f1_insert_with_two_rows()
1
Warnings:
Warning 1048 Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
10 0
10 10
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
DROP FUNCTION f1_insert_with_two_rows;
SET SESSION sql_mode = 'traditional';
CREATE FUNCTION f1_insert_with_two_rows() RETURNS INTEGER
BEGIN
INSERT INTO t1_not_null(f1,f2) VALUES (10,10),(10,NULL);
RETURN 1;
END;
SELECT f1_insert_with_two_rows();
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SET SESSION sql_mode = '';
# FUNCTION in Correlated Subquery
SELECT 1 FROM t1_select t1
WHERE 1 = (SELECT f1_insert_with_two_rows() FROM t1_select t2
WHERE t2.f1 = t1.f1);
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
# FUNCTION in JOIN
SELECT 1 FROM t1_select t1, t1_select t2
WHERE t1.f1 = t2.f1 AND t2.f1 = f1_insert_with_two_rows();
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT STRAIGHT_JOIN * FROM t1_select t2 RIGHT JOIN t1_select t1
ON t1.f1 = t1.f1 WHERE 1 = f1_insert_with_two_rows();
ERROR 23000: Column 'f2' cannot be null
DROP FUNCTION f1_insert_with_two_rows;
# FUNCTION in UNION
SELECT 1
UNION ALL
SELECT f1_two_inserts();
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
# FUNCTION in INSERT
INSERT INTO t1_aux SET f1 = 1, f2 = f1_two_inserts();
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
INSERT INTO t1_aux SELECT 1, f1_two_inserts();
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT * FROM t1_aux ORDER BY f1,f2;
f1 f2
INSERT INTO t1_aux VALUES(1,f1_two_inserts());
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT * FROM t1_aux ORDER BY f1,f2;
f1 f2
# FUNCTION in DELETE
INSERT INTO t1_aux VALUES (1,1);
COMMIT;
DELETE FROM t1_aux WHERE f1 = f1_two_inserts();
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT * FROM t1_aux ORDER BY f1,f2;
f1 f2
1 1
# FUNCTION in UPDATE SET
UPDATE t1_aux SET f2 = f1_two_inserts() + 1;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
SELECT * FROM t1_aux ORDER BY f1,f2;
f1 f2
1 1
# FUNCTION in VIEW definition
CREATE VIEW v1_func AS SELECT f1_two_inserts() FROM t1_select;
SELECT * FROM v1_func;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
DROP VIEW v1_func;
# FUNCTION in CREATE TABLE ... AS SELECT
CREATE TABLE t1_fail AS SELECT f1_two_inserts() FROM t1_select;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
CREATE TABLE t1_fail AS SELECT * FROM t1_select WHERE 1 = f1_two_inserts();
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
# FUNCTION in ORDER BY
SELECT * FROM t1_select ORDER BY f1,f1_two_inserts();
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
# FUNCTION in aggregate function
SELECT AVG(f1_two_inserts()) FROM t1_select;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
# FUNCTION in HAVING
SELECT 1 FROM t1_select HAVING AVG(f1) = f1_two_inserts() + 2;
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
DROP FUNCTION f1_two_inserts;
# FUNCTION modifies Updatable VIEW
CREATE VIEW v1_not_null AS SELECT f1,f2 FROM t1_not_null WITH CHECK OPTION;
CREATE FUNCTION f1_two_inserts_v1() RETURNS INTEGER
BEGIN
INSERT INTO v1_not_null SET f1 = 10, f2 = 10;
INSERT INTO v1_not_null SET f1 = 10, f2 = NULL;
RETURN 1;
END//
SELECT f1_two_inserts_v1();
ERROR 23000: Column 'f2' cannot be null
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
ROLLBACK;
SELECT * FROM t1_not_null ORDER BY f1,f2;
f1 f2
DROP FUNCTION f1_two_inserts_v1;
DROP VIEW v1_not_null;
# FUNCTION causes FOREIGN KEY constraint violation
CREATE TABLE t1_parent (f1 BIGINT, f2 BIGINT, PRIMARY KEY(f1))
ENGINE = InnoDB;
INSERT INTO t1_parent VALUES (1,1);
CREATE TABLE t1_child (f1 BIGINT, f2 BIGINT, PRIMARY KEY(f1),
FOREIGN KEY (f1) REFERENCES t1_parent(f1))
ENGINE = InnoDB;
CREATE FUNCTION f1_two_inserts() RETURNS INTEGER
BEGIN
INSERT INTO t1_child SET f1 = 1, f2 = 1;
INSERT INTO t1_child SET f1 = 2, f2 = 2;
RETURN 1;
END//
SELECT f1_two_inserts();
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1_child`, CONSTRAINT `t1_child_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t1_parent` (`f1`))
SELECT * FROM t1_child;
f1 f2
DROP TABLE t1_child;
DROP TABLE t1_parent;
DROP FUNCTION f1_two_inserts;
DROP TABLE t1_select;
DROP TABLE t1_aux;
DROP TABLE t1_not_null;
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