Bug #80404 After sql_warnings to 0, the INSERT still get warnings message

• Submitted: 17 Feb 2016 11:06
• Modified: 17 Feb 2016 13:24
• Reporter: Su Dylan
• Status: Verified
• Category: MySQL Server: DML
• Severity: S3 (Non-critical)
• Version: 5.0/5.1/5.5/5.6/5.7
• OS: Any
• CPU Architecture: Any

[17 Feb 2016 11:06] Su Dylan

Description:
Output:
=====
mysql>
mysql> set sql_mode = '';
Query OK, 0 rows affected (0.00 sec)

mysql> create table t1 (c1 int, c2 int);
set sql_warnings = 0;
Query OK, 0 rows affected (0.01 sec)

mysql> set sql_warnings = 0;
Query OK, 0 rows affected (0.00 sec)

mysql> SHOW VARIABLES LIKE '%sql_warnings%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| sql_warnings  | OFF   |
+---------------+-------+
1 row in set, 1 warning (0.00 sec)

mysql> insert into t1 values(1,'b');
Query OK, 1 row affected, 1 warning (0.00 sec)

mysql>
mysql> set sql_warnings = 1;
Query OK, 0 rows affected (0.00 sec)

mysql> SHOW VARIABLES LIKE '%sql_warnings%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| sql_warnings  | ON    |
+---------------+-------+
1 row in set, 1 warning (0.00 sec)

mysql> insert into t1 values(1,'b');
Query OK, 1 row affected, 1 warning (0.00 sec)

Problem:
=====
After sql_warnings to 0, the INSERT still get warnings message.

How to repeat:
drop table t1;

set sql_mode = '';
create table t1 (c1 int, c2 int); 
set sql_warnings = 0;
SHOW VARIABLES LIKE '%sql_warnings%';
insert into t1 values(1,'b');

set sql_warnings = 1;
SHOW VARIABLES LIKE '%sql_warnings%';
insert into t1 values(1,'b');

Suggested fix:
After sql_warnings to 0, the INSERT returns NO warnings.

[17 Feb 2016 13:24] MySQL Verification Team

Thank you for the bug report. That behavior exists since 5.0.

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Server version: 5.7.12 Source distribution PULL: 2016-FEB-06

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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql 5.7 > use test
Database changed
mysql 5.7 > drop table t1;
Query OK, 0 rows affected (0.03 sec)

mysql 5.7 >
mysql 5.7 > set sql_mode = '';
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql 5.7 > create table t1 (c1 int, c2 int);
Query OK, 0 rows affected (0.03 sec)

mysql 5.7 > set sql_warnings = 0;
Query OK, 0 rows affected (0.00 sec)

mysql 5.7 > SHOW VARIABLES LIKE '%sql_warnings%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| sql_warnings  | OFF   |
+---------------+-------+
1 row in set (0.00 sec)

mysql 5.7 > insert into t1 values(1,'b');
Query OK, 1 row affected, 1 warning (0.01 sec)

mysql 5.7 >
mysql 5.7 > set sql_warnings = 1;
Query OK, 0 rows affected (0.00 sec)

mysql 5.7 > SHOW VARIABLES LIKE '%sql_warnings%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| sql_warnings  | ON    |
+---------------+-------+
1 row in set (0.00 sec)

mysql 5.7 > insert into t1 values(1,'b');
Query OK, 1 row affected, 1 warning (0.04 sec)

mysql 5.7 >