Re: Translate Function PL/pgSQL to SQL92

2010/12/16 serviciotdf <serviciotdf@gmail.com>

Hello,

I have a Function in PL/pgSQL and I need to translate it to SQL92, but I'm stuck.

###
CREATE OR REPLACE FUNCTION pruebas(varchar, varchar, integer)
RETURNS SETOF personal AS
$delimiter$
BEGIN
PERFORM id from documentos WHERE descripcion = $1;
IF NOT FOUND THEN
   INSERT INTO documentos(descripcion) VALUES($1);
END IF;
INSERT INTO personal(nombre,idtipodocumento,numdoc)
VALUES($2, (SELECT id from documentos WHERE descripcion = $1), $3);
END;
$delimiter$
LANGUAGE plpgsql;
###

Tables

CREATE TABLE documentos
 id serial NOT NULL,
 descripcion character varying(60),
 CONSTRAINT pkdocumentos PRIMARY KEY (id)


CREATE TABLE personal
 id serial NOT NULL,
 nombre character varying(60),
 idtipodocumento smallint NOT NULL,
 numdoc integer,
 CONSTRAINT pkpersonal PRIMARY KEY (id),
 CONSTRAINT fkpdoc FOREIGN KEY (idtipodocumento)
     REFERENCES documentos (id) MATCH SIMPLE
     ON UPDATE CASCADE ON DELETE NO ACTION,
 CONSTRAINT unqnumdoc UNIQUE (idtipodocumento, numdoc)

If I understand correctly, you mean translating this function into a sequence of plain SQL commands:

INSERT INTO documentos(descripcion) SELECT $1
WHERE NOT EXISTS ( SELECT id FROM documentos WHERE descripcion = $1 );

INSERT INTO personal ( nombre, idtipodocumento, numdoc )
SELECT $2, ( SELECT id FROM documentos WHERE descripcion = $1 ), $3;

of course you will need to bind / pass parameters...

HTH

Filip