Cannot open relation pg_cast_source_target_index

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Hi,

I've just upgraded a production database from 7.3.4 to 7.4.2.

I 'sometimes' get the following error while executing a PHP code:

"mdfd_getrelnfd cannot open relation pg_cast_source_target_index"

Quoted 'sometimes', since I really get this error rarely! This is a simple
SELECT query.

What are the possible causes of this? Google didn't help me...

Regards,
- --
Devrim GUNDUZ
devrim~gunduz.org                devrim.gunduz~linux.org.tr
            http://www.TDMSoft.com
            http://www.gunduz.org
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