[GENERAL] Tricking postgresql to do a oracle-like stored Procedure

I have this idea to emulate a stored procedure in PostgreSQL. It seems to
work, but I have not benchmarked it. I decided to post a message out here
to see what people think about the idea.

First of all "THIS IS A WORKAROUND" , I AM NOT PROPOSING A FIX ...

O.K., Here's the idea ..

I want to simulate the oracle call exec
sp1(INPARM1,INPARM2,OUTPARM1,OUTPARM2);

-- Say have a simple Oracle Stored Procedure ... like so:

procedure sp1 (iparm1 IN integer, oparm2 OUT integer, oparm3 OUT) as
begin
IF (iparm1 <> 1) then
oparm2 := 172;
oparm3 := 201;
endif
end:
.
. - - -- > execute sp1(0,:outParm2,:outParm3)

with Postgresql we can do this

Create Temporary table table_with_SP1_Name ( inparm1 integer, outparm2
integer, outparm3 integer );
create function SP1(integer, integer,integer) returns integer as '
begin
delete from table_with_SP1_Name ;
if ($1 <> 1) then
insert into table_with_SP1_Name ($1,172,201);
endif;
end; ' language 'plpgsql';

then I would have to use two statements to execute the stored procedure ...

----> select sp1(0,:outParm2,:Outparm3);
select inparm2, outparm2, outparm3 into :inparm2, :outparm2,
:outparm3 from table_with_SP1_name ;

If the temp table is memory only, then my only major overhead would be the
additional SQL request. ...

---------------------------------------------------------------------------------------------------------

Arthur Nicewick
American Management Systems
Corporate Technology Group
art_nicewick(at)ams(dot)com
(703) 267-8569

Quote of the week:
"Computers in the future may weigh no more than 1.5 tons."
Popular Mechanics, forecasting the relentless march of science, 1949

tfo(at)monsterlabs(dot)com
Sent by: To: pgsql-general(at)postgresql(dot)org
pgsql-general-owner(at)post cc: pgsql-admin(at)postgresql(dot)org
gresql.org Subject: [GENERAL] psql \df and opaque functions


03/05/02 01:39 PM

is it a known issue that \df in psql does not list functions that return
opaque (i.e., those used in triggers)?

also, does \dd only list builtins? if so, is there a convenient way to
view triggers in psql?

-tfo

p.s. i've looked through the docs, to no avail, and would've checked
the archives, but search seems to be broken, at the moment.

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