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Home » Modeling » EMF "Technology" (Ecore Tools, EMFatic, etc)  » [CDO] Storing multivalue-attributes
[CDO] Storing multivalue-attributes [message #617873] Tue, 22 April 2008 12:43
Stefan Winkler is currently offline Stefan WinklerFriend
Messages: 301
Registered: July 2009
Location: Germany
Senior Member
Hi Eike,

I have reached a point in development, where I'd like to store an
EAttribute with upperBound = -1.
If the EAttribute type is String, EMF generates getMyAttribute() :
What reaches MySQLAdapter.appendValue() is a MoveableArrayList<String>.
As nobody in the DBAdapter - DBField chain knows how to deal with
MoveableArrayLists, this results in a failing SQL statement.

=> filed Bug 228190 <>

Other than with the Date type, which I patched (see Bug 217255
<>), and for which
deserialization works out of the box, with this case, I do not really
know, what to do.

I guess to be able to achieve serialization, the DBField, DBAdapter and
maybe something in cdo.server.internal.db.* have to be extended. So one
could think of a way to serialize such an attribute as a Blob, but then,
the natural way would be to create an own table.

Do you have an idea, how this can be handled, or can you provide a
quickfix for that issue?

How is the CDO-Teneo-Hibernate-Mapping getting along? When will it be
useable as an alternative in order to work around the problems with the
MySQL database support?

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