postgresql_fdw issues with triggers on the foreign tables

From: Eelke Klein <eelke(at)bolt(dot)nl>
To: pgsql-general(at)postgresql(dot)org
Subject: postgresql_fdw issues with triggers on the foreign tables
Date: 2014-07-23 14:30:54
Message-ID: CALEkvvxfwRsAf7VP7EVCwZJvufJeEboc6jKiajXumo+N18xc=g@mail.gmail.com
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I'm experimenting with using foreign data wrappers to get data from one
database to another. Most things work perfectly but I am encountering two
issues with triggers on the foreign tables.

The first one is when a query triggers a trigger on the foreign table the
trigger doesn't have any search_path. Not even a select on a table in
public will work from the trigger unless I specify the schema name.

The second problem has to do with DEFAULT values. One of the tables i'm
inserting data on has a column called id of type bigserial. This column is
not filled by the INSERT statement I'm using so should use it's default
which is nextval('...'::regclass); However in the BEFORE INSERT trigger the
value of NEW.id IS NULL while normally it would already be assigned a value
from the sequence.

The issues with the triggers do not occur when they are triggered by
statements executed directly on the database. Only when the statements come
from the FDW I have these issues.

The "local" database is version 9.3.3 x64 windows from EnterpriseDB
The foreign database is version 9.3.2 x64 freebsd 10 clang3.3

Regards, Eelke

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