Re: Translate Function PL/pgSQL to SQL92

2010/12/16 serviciotdf <serviciotdf(at)gmail(dot)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