From: Richard Rowell <richard@bowmansystems.com>
To: pgsql-sql@postgresql.org
Subject: Recursive SETOF function
Date: Mon, 22 Nov 2004 09:18:13 -0600
Message-ID: <1101136693.18148.66.camel@richard> (raw)
I'm trying to port some TSQL to PLPGSQL. The DB has a table with a
recursive foreign key that represents a tree hierarchy. I'm trying to
re-create a TSQL function that pulls out all the ancestors of a given
node in the hierarchy.
I'm rather new to PLSQL and I have several questions.
1. In TSQL, I can assign a scalar to the result of query like so:
SET @var1 = (SELECT foo FROM bar WHERE bar.uid=@var2)
How would I do this in PLSQL?
2. In TSQL the "result table" can be inserted into manually. IE:
CREATE FUNCTION foo () RETURNS @ttable TABLE( uid INTEGER) AS BEGIN
INSERT @ttable VALUES (1)
RETURN
END
Is there a way to manually insert rows into the result table in PLSQL?
What follows is my TSQL function if that helps give context.
CREATE FUNCTION svp_getparentproviderids (@child_provider INTEGER)
RETURNS @provider_ids TABLE ( uid INTEGER )
AS
BEGIN
DECLARE @cid AS INTEGER
IF (SELECT count(*) FROM providers WHERE uid =@child_provider) > 0
BEGIN
SET @cid = @child_provider
WHILE @cid IS NOT NULL
BEGIN
INSERT @provider_ids VALUES (@cid)
SET @cid = (SELECT parent_id FROM providers WHERE uid=@cid)
END
END
RETURN
END
--
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To: pgsql-sql@postgresql.org
Cc: richard@bowmansystems.com
Subject: Re: Recursive SETOF function
In-Reply-To: <1101136693.18148.66.camel@richard>
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