On 04/04/2013 04:28 PM, Robert Lefkowitz wrote:
Not sure if this is a feature request or a bug report.
I'm trying to use Foreign Tables for a variety of things and it is useful to have a foreign table which appears to be read/write.
Having set one up, I can select data from it. However, I can't insert, update or delete.
No worries, thinks I. I'll just create an INSTEAD OF TRIGGER -- and handle the updates that way.
However, one can't create a TRIGGER (in PosgreSQL version 9.2) on a foreign table -- the error message is: not a table or view.
My current workaround is to create a view which is defined as CREATE VIEW viewOnForeignTable AS SELECT * FROM foreignTable
I can then create INSTEAD OF TRIGGERs on viewOnForeignTable, as well as SELECT from viewOnForeignTable -- so that becomes the canonical interface.
However, it seems like it should be just as acceptable to apply the INSTEAD OF TRIGGERs to the FOREIGN TABLE .
Should I consider this a bug (that I can't create aTRIGGER on a foreign table?) or a feature request (to allow creating TRIGGERs on foreign tables)?
FYI, 9.3 will have update/insert/delete depending on the capabilities of
the underlying Foreign Data Wrapper:
http://www.depesz.com/2013/03/17/waiting-for-9-3-support-writable-foreign-tables/
Not sure if that fills your need?
You could file a feature request but new features are not added to minor
releases, so you will not see it until a later major release. At a guess
9.4+.
Thanks,
r0ml
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Adrian Klaver
adrian.klaver@xxxxxxxxx
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