By: Darren Cassar

Darren Cassar — Wed, 07 Sep 2011 02:57:42 +0000

Hi Shon,
If you follow the instructions above it’ll work fine. If you are setting a to some other data type it might not work.

mysql Tue Sep 6 19:39:19 2011 > use test;
Database changed

mysql Tue Sep 6 19:39:31 2011 > CREATE TABLE test.abc(a DECIMAL(17,3)) ENGINE=MYISAM;
Query OK, 0 rows affected (0.01 sec)

mysql Tue Sep 6 19:39:31 2011 > INSERT INTO abc VALUES ( DATE_FORMAT(STR_TO_DATE(‘MAR 16 2008 09:12:51:893PM’,'%M %d %Y %h:%i:%s:%f%p’),’%Y%m%d%k%i%s.%f’) );
Query OK, 1 row affected (0.01 sec)

mysql Tue Sep 6 19:39:48 2011 > SELECT * FROM abc;
+——————–+
| a |
+——————–+
| 20080316211251.893 |
+——————–+
1 row in set (0.00 sec)

mysql Tue Sep 6 19:39:53 2011 > SELECT TIMESTAMP(a) FROM abc;
+—————————-+
| TIMESTAMP(a) |
+—————————-+
| 2008-03-16 21:12:51.893000 |
+—————————-+
1 row in set (0.01 sec)

mysql Tue Sep 6 19:56:52 2011 > show variables like ‘sql_mode’;
+—————+——————————————————————————————————————————————————+
| Variable_name | Value |
+—————+——————————————————————————————————————————————————+
| sql_mode | STRICT_TRANS_TABLES,STRICT_ALL_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,TRADITIONAL,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |
+—————+——————————————————————————————————————————————————+
1 row in set (0.00 sec)

By: shon

shon — Tue, 06 Sep 2011 16:53:01 +0000

I get the following exception when trying to run “select timestamp(a) from abc;”

System.FormatException
Input string was not in a correct format.
Stack Trace:
at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
at MySql.Data.Types.MySqlDateTime.ParseMySql(String s)
at MySql.Data.Types.MySqlDateTime.MySql.Data.Types.IMySqlValue.ReadValue(MySqlPacket packet, Int64 length, Boolean nullVal)
at MySql.Data.MySqlClient.NativeDriver.ReadColumnValue(Int32 index, MySqlField field, IMySqlValue valObject)
at MySql.Data.MySqlClient.ResultSet.ReadColumnData(Boolean outputParms)
at MySql.Data.MySqlClient.ResultSet.NextRow(CommandBehavior behavior)
at MySql.Data.MySqlClient.MySqlDataReader.Read()
at Quest.Toad.Db.ToadDataAdapter.InternalReadBackground()

Comments on: Datetime & Timestamp manipulation / migration explained

By: Darren Cassar

By: shon