Hi guys,

Is the patch I uploaded to
http://bugs.freepascal.org/view.php?id=26064
correct?

Thanks,
Reinier

Replied in bugtracker.

Michael.

Hi,
I know , that I am bit late ;-), but:
- for compatibility reasons I would choose another path (mentioned by Michael as "second"). As it was mentioned in comments in bug tracker there are two similar methods:
-- SetDataType (protected)
-- SetFieldType (public with checks ... see in fields.inc)

Please see also:
http://docwiki.embarcadero.com/Libraries/XE4/en/Data.DB.TBlobField.SetFieldType And "Note: Calling *SetFieldType* does the same thing as setting the BlobType
<http://docwiki.embarcadero.com/Libraries/XE4/en/Data.DB.TBlobField.BlobType> property."

So I would use patch in bug tracker and second in all TBlobFields descendants use SetFieldType instead of SetDataType in their constructors.

Side question is if there can be situation, where DataType BlobType. I did not test in Delphi, but in our current implementation it is possible, because setting BlobType does not change DataType

Bye
-Laco.