Re: Still problems with BLOB and LONG VARCHAR FOR BIT DATA columns


You execute
SELECT FROM com.amat.mdlx.ginestra.plugins.materials.model.Element
which needs to create a UNION statement, to be able to catch all subclasses of that type. It needs to select the fields that are in the FetchPlan for that candidate (Element). So it selects some field that is stored in a BLOB column. And your database isn't capable of doing that (the error message).

So don't select the field ... remove it from the default fetch group. Or just select one of the subclasses of "Element".
Don't see what DataNucleus can do different. If you have SQL that you think it could do then you can provide it for comment

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