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Steve Ebersole reassigned HHH-468:
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Assignee: Steve Ebersole (was: Scott Marlow)
MysqlDialect incorrectly maps java.lang.Boolean to SQL BIT
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Key: HHH-468
URL:
http://opensource.atlassian.com/projects/hibernate/browse/HHH-468
Project: Hibernate Core
Issue Type: Bug
Affects Versions: 3.0.3
Environment: Hibernate 3.0, MySQL.
Reporter: Mark Matthews
Assignee: Steve Ebersole
Fix For: 4.0.0.Alpha2
I didn't track down how java.lang.Boolean gets mapped to Types.BIT in hibernate, but
you probably _don't_ want to map to "bit" like you do in MysqlDialect.
"bit", according to SQL99 (it's not in the core standard, and the type was
actually dropped for sql2k3) is a bitfield, not a boolean value. You can of course define
a bit(1), but it is technically more correct for java.lang.Boolean to map to a SQL BOOLEAN
for MySQL since we support a BOOLEAN and a BIT.
It looks like the JDBC-3.0 guys ignored what the standard said, because in reality
you'd want BIT to map to something like byte[], or java.util.BitSet if you were
tracking how the SQL standard defines BIT.
I'm guessing you probably want to map to "boolean", which the JDBC driver
will automagically convert for you, as it silently maps to TINYINT(1) on the server side.
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