Thread: How to return records from a function

Hello everyone.
I've spent the last few hours trying to come up with a function that
at the most basic returns the result of a SELECT * FROM <table>.

This is easy to do in something like MSSQL or Oracle. For example in
MSSQL i can do something like:

CREATE PROCEDURE proc_name AS

BEGIN SELECT * FROM sometable
END


How do I do something like that with a Postgresql function/stored
procedure? All I really want to know is how to by using a function how
can I return the results of a SELECT * query!?

The end result of the query I need is more complicated, but I can't
even get something that easy to work. Are functions unable to return
result sets?? All of the examples i've seen always return a single
value, like an int. That doesn't do me any good.

I want to use a few stored procedures to create some faster processing
for some queries that involve 3-4 tables plus require some input
parameters, and return a result set.

Any help would be appreciated. I've just recently started using
PostgreSQL and I'm very impressed! I'm sure I'm jsut overlooking
something easy, but for the life of me i just can't figure it out.

Thanks,
John

Thanks!

That's somewhat of what i was looking for. However it seems that what I
wanted to do is still not possible.

I'm writing a Java application and wanted to use CallableStatement to call a
PostgreSQL function. However it seems that the driver does not implement
that functionality. I guess I can just use a regular statement calling a
function but there seems to be problems doing that as well. Are there any
other JDBC drivers for PostgreSQL?

Thanks,
john


----- Original Message -----
From: <jasiek@serwer.skawsoft.com.pl>
To: "John Cavacas" <oogly@rogers.com>
Cc: <pgsql-sql@postgresql.org>
Sent: February 2, 2003 10:52 AM
Subject: Re: [SQL] How to return records from a function


> Did you look at
> http://techdocs.postgresql.org/guides/SetReturningFunctions
> ? You need Postgresql 7.3 to do this.
> Regards,
> Tomasz Myrta

Did you look at
http://techdocs.postgresql.org/guides/SetReturningFunctions
? You need Postgresql 7.3 to do this.
Regards,
Tomasz Myrta