[8 Dec 15:21] Miguel Solorzano
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C:\dbs>c:\dbs\5.6\bin\mysql -uroot --port=3560 --debug-info
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--prompt="mysql 5.6 > "
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Welcome to the MySQL monitor. Commands end with ; or \g.
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Your MySQL connection id is 1
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Server version: 5.6.23 Source distribution 2014.12.02
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Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights
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reserved.
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Oracle is a registered trademark of Oracle Corporation and/or its
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affiliates. Other names may be trademarks of their respective
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owners.
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Type 'help;' or '\h' for help. Type '\c' to clear the current input
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statement.
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mysql 5.6 > select cast('foo' as unsigned);
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+-------------------------+
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| cast('foo' as unsigned) |
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+-------------------------+
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| 0 |
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+-------------------------+
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1 row in set, 1 warning (0.00 sec)
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mysql 5.6 > show warnings;
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+---------+------+------------------------------------------+
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| Level | Code | Message |
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+---------+------+------------------------------------------+
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| Warning | 1292 | Truncated incorrect INTEGER value: 'foo' |
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+---------+------+------------------------------------------+
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1 row in set (0.00 sec)
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mysql 5.6 > select cast('bar' as unsigned);
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+-------------------------+
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| cast('bar' as unsigned) |
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+-------------------------+
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| 0 |
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+-------------------------+
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1 row in set, 1 warning (0.00 sec)
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mysql 5.6 > show warnings;
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+---------+------+------------------------------------------+
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| Level | Code | Message |
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+---------+------+------------------------------------------+
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| Warning | 1292 | Truncated incorrect INTEGER value: 'bar' |
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+---------+------+------------------------------------------+
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1 row in set (0.00 sec)
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mysql 5.6 > select cast(42.0 as unsigned);
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+------------------------+
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| cast(42.0 as unsigned) |
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+------------------------+
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| 42 |
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+------------------------+
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1 row in set (0.00 sec)
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mysql 5.6 > show warnings;
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+---------+------+------------------------------------------+
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| Level | Code | Message |
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+---------+------+------------------------------------------+
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| Warning | 1292 | Truncated incorrect INTEGER value: 'bar' |
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+---------+------+------------------------------------------+
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1 row in set (0.00 sec)
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mysql 5.6 > select cast(42.0 as unsigned) from mysql.user limit 1;
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+------------------------+
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| cast(42.0 as unsigned) |
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+------------------------+
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| 42 |
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+------------------------+
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1 row in set (0.00 sec)
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mysql 5.6 > show warnings;
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Empty set (0.00 sec)
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mysql 5.6 >
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------------------------------------------------------------------------
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[8 Dec 14:35] Hartmut Holzgraefe
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Description:
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Warnings are not reset on successful execution of a SELECT statement
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without FROM clause or when using the dummy "FROM DUAL". If the
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statement raises a new warning though the old warnings are replaced.
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How to repeat:
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MySQL [test]> select cast('foo' as unsigned);
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+-------------------------+
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| cast('foo' as unsigned) |
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+-------------------------+
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| 0 |
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+-------------------------+
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1 row in set, 1 warning (0.00 sec)
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MySQL [test]> show warnings;
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+---------+------+------------------------------------------+
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| Level | Code | Message |
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+---------+------+------------------------------------------+
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| Warning | 1292 | Truncated incorrect INTEGER value: 'foo' |
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+---------+------+------------------------------------------+
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1 row in set (0.00 sec)
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MySQL [test]> select cast('bar' as unsigned);
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+-------------------------+
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| cast('bar' as unsigned) |
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+-------------------------+
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| 0 |
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+-------------------------+
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1 row in set, 1 warning (0.00 sec)
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MySQL [test]> show warnings;
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+---------+------+------------------------------------------+
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| Level | Code | Message |
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+---------+------+------------------------------------------+
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| Warning | 1292 | Truncated incorrect INTEGER value: 'bar' |
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+---------+------+------------------------------------------+
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1 row in set (0.00 sec)
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MySQL [test]> select cast(42.0 as unsigned);
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+------------------------+
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| cast(42.0 as unsigned) |
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+------------------------+
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| 42 |
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+------------------------+
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1 row in set (0.00 sec)
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MySQL [test]> show warnings;
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+---------+------+------------------------------------------+
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| Level | Code | Message |
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+---------+------+------------------------------------------+
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| Warning | 1292 | Truncated incorrect INTEGER value: 'bar' |
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+---------+------+------------------------------------------+
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1 row in set (0.00 sec)
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MySQL [test]> select cast(42.0 as unsigned) from dual;
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+------------------------+
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| cast(42.0 as unsigned) |
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+------------------------+
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| 42 |
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+------------------------+
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1 row in set (0.00 sec)
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MySQL [test]> show warnings;
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+---------+------+------------------------------------------+
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| Level | Code | Message |
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+---------+------+------------------------------------------+
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| Warning | 1292 | Truncated incorrect INTEGER value: 'bar' |
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+---------+------+------------------------------------------+
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1 row in set (0.00 sec)
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MySQL [test]> select cast(42.0 as unsigned) from mysql.user limit 1;
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+------------------------+
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| cast(42.0 as unsigned) |
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+------------------------+
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| 42 |
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+------------------------+
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1 row in set (0.00 sec)
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MySQL [test]> show warnings;
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Empty set (0.00 sec)
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