Re: Function Syntax Help - Mailing list pgsql-sql

From: epailty@googlemail.com [mailto:epailty@googlemail.com] On Behalf Of Brian Modra
Sent: Friday, October 30, 2009 2:46 PM
To: Plugge, Joe R.
Cc: pgsql-sql@postgresql.org
Subject: Re: [SQL] Function Syntax Help

Thanks Brian, I changed it to this:

 

CREATE FUNCTION gen_simultaneous_calls(mystart timestamp, mystop timestamp) RETURNS VOID AS $$

DECLARE

    mycount integer;

BEGIN

    WHILE mystart < mystop + INTERVAL '1 day' LOOP

    SELECT INTO mycount  count(*) FROM log_calls WHERE startdate < mystart and enddate > mystop;

    INSERT INTO simultaneous_calls_rpt (startdate,call_count) VALUES (mystart,mycount);

    mystart := mystart + INTERVAL '1 minute';

    mystop  := mystop + INTERVAL '1 minute';

    END LOOP;

END;

    $$ LANGUAGE 'plpgsql' STABLE;

 

But now am getting a different error:

 

[postgres@linux1559 ~]$ cat gen_simultaneous_calls.sql | psql holly

ERROR:  "$1" is declared CONSTANT

CONTEXT:  compilation of PL/pgSQL function "gen_simultaneous_calls" near line 7

 

 

 

From: epailty@googlemail.com [mailto:epailty@googlemail.com] On Behalf Of Brian Modra
Sent: Friday, October 30, 2009 2:29 PM
To: Plugge, Joe R.
Cc: pgsql-sql@postgresql.org
Subject: Re: [SQL] Function Syntax Help

 

2009/10/30 Plugge, Joe R. <JRPlugge@west.com>

I am trying to create a function that will grind through a cdr table and populate another table.  I am trying to load the function and am getting the following error:

 

ERROR:  function result type must be specified

 

 

CREATE FUNCTION gen_simultaneous_calls(mystart timestamp, mystop timestamp) AS $$ DECLARE

you need to tell it the return type. If there is none, "returns void"

e.g.
 CREATE FUNCTION gen_simultaneous_calls(mystart timestamp, mystop timestamp) returns void AS $$

    mycount integer;

BEGIN

    WHILE mystart < mystop + INTERVAL '1 day' LOOP

    SELECT INTO mycount  count(*) FROM log_calls WHERE startdate < mystart and enddate > mystop;

    INSERT INTO simultaneous_calls_rpt (startdate,call_count) VALUES (mystart,mycount);

    mystart := mystart + INTERVAL '1 minute';

    mystop  := mystop + INTERVAL '1 minute';

    END LOOP;

END;

    $$ LANGUAGE 'plpgsql' STABLE;

 

 

 

 

 

Joe R. Plugge

Database Administrator, West Interactive Corporation

11650 Miracle Hills Drive, Omaha NE 68154

402-716-0349 | Cell 402-517-2710 | jrplugge@west.com

 

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