From: [email protected]
[mailto:[email protected]] On Behalf Of Eelke Klein
Sent: Wednesday, July 23, 2014 10:31 AM
To: [email protected]
Subject: [GENERAL] postgresql_fdw issues with triggers on the foreign tables
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
So, as a workaround, if you already catch “NEW.id IS NULL” in BEFORE INSRT
trigger, you could assign NEW.id value nextval('...'::regclass) right then
and there explicitly in such cases.
Regards,
Igor Neyman
