-------- Original-Nachricht --------
Datum: Wed, 02 Jul 2008 15:42:07 +0200
Von: "Dirk Brenckmann" <Brenckmann.Sourceforge@(protected)>
An: users@(protected)
Betreff: Q: Howto set TIMESTAMP column to null?
Database: mysql 4.1
Geronimo 2.0.1
Hi there,
I'm using a database with timestamp columns that can be null. Using SQL syntax, null enties can be set by either not setting the field when creating a row, or by explictly setting it to '0000-00-00 00:00:00'.
This lead me to some amazing discoveries :-)
Merging the Bean using a null value results in a database column value equals to "NOW()" (GNARF!)
java.sql.Timestamp.valueOf( "0000-00-00 00:00:00" ); results in an OutOfMemoryException
--- code ---
/**
* Returns the "valid to" timestamp, which specifies the date/time when entitys
* data becomes invalid. A value of null or '0000-00-00 00:00:00' means, the entity
* never becomes invalid.
*
* @return the "valid to" timestamp of the entity.
*/
@Column( name = "validTo",
columnDefinition = "timestamp default '0000-00-00 00:00:00'",
nullable = true, insertable = true, updatable = true )
// @Temporal( TemporalType.TIMESTAMP )
public
java.sql.Timestamp getValidTo() {
return this.validTo;
}
--- code ---
Switching to java.langString (as return type) results in an OutOfMemoryException (My guess is a convertion: see Timestamp)
The @Temporal annotation was removed, due to what ? You are right - due to an OutOfMemoryException :-)
Please be aware that changing the database (a few GB data) to not use null/'0000-00-00 00:00:00' values is no option at all.
Any ideas how to get this working?
Tyvm in advance.
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