Bug #7615 No warning when inserting a NULL value into a non null column
Submitted: 2 Jan 2005 10:33 Modified: 11 Jan 2005 11:13
Reporter: Georg Richter Email Updates:
Status: Not a Bug Impact on me:
None 
Category:MySQL Server: Embedded Library ( libmysqld ) Severity:S3 (Non-critical)
Version:4.1.8 OS:Linux (Linux)
Assigned to: Alexey Botchkov CPU Architecture:Any

[2 Jan 2005 10:33] Georg Richter 
Description:
When inserting a NULL value in a column which is defined as NOT NULL, 
mysql_warning_count returns 0 instead of 1. 

How to repeat:
... 
mysql_query(mysql, "CREATE TABLE t1 (a int NOT NULL)"); 
mysql_query(mysql,"INSERT INTO t1 VALUES (NULL)"); 
 
if (mysql_warning_count(mysql)) { 
	printf("Warning! ...."); 
} else { 
	printf("Bug :(\n"); 
}
[11 Jan 2005 11:13] Alexey Botchkov 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.mysql.com/documentation/ and the instructions on
how to report a bug at http://bugs.mysql.com/how-to-report.php

Additional info:

As i can see the above is the correct behaviour.
Warnings are produced only if the INSERT has multiple values to insert or
in INSERT SELECT statement.
Single-valued INSERT returns error both in 'embedded' and 'remote' libraries.