[Débutant][8.2] Aide syntaxe Fonction SQL

Bonjour à tous,

Me revoilà donc avec un problème de syntaxe sur ma création de procédure. Visiblement, le problème viendrait du DECLARE non reconnu en LANGUAGE SQL (d'après un vieux sujet du forum) mais ça me surprend.

Voici le code :

Code:

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CREATE FUNCTION P0600 (
IN V0 SMALLINT
, IN V1 CHAR(5)
, IN V2 CHAR(5)
, IN V3 CHAR(8)
, IN V4 CHAR(8)
) RETURNS refcursor as
$$
DECLARE 
ref refcursor;
I1 VARCHAR(5000);
BEGIN
SET I1 = 'SELECT F0600.F0600_00, F0600_01, F0600_02, F0600_03, F0600_04, F0600_05, F0600_06, F0600_08, F0600_11, F0600_12,
	F0601.F0601_00, F0601.F0602_00, F0601.F0603_00, F0601.F0606_00, F0600_13, F0600_16, F0600_17, F0600_18, F0600.F0603_00, F0600.F0606_00,
	F0600_19, F0600_20, F0600_21, F0600_22, F0600_23, F0600_24
	FROM F0600 AS F0600
	LEFT OUTER JOIN F0609 AS F0609 ON F0609.F0600_00 = F0600.F0600_00
	LEFT OUTER JOIN F0601 AS F0601 ON F0601.F0601_00 = F0609.F0601_00
	WHERE F0600.F0001_00 =  ''' || V1 || ''' AND F0600.F0002_00 = ''' || V2 || '''';
IF V0 = 1 THEN 
	SET I1 = I1 || ' AND ((F0601_03 >= ' || V3 || ' AND F0601_03 < ' || V4 || ')
	AND F0601.F0601_00 IS NOT NULL AND F0601.F0602_00 IS NOT NULL AND F0601.F0603_00 IS NOT NULL AND F0601.F0606_00 IS NOT NULL)';
ELSE
	SET I1 = I1 || ' AND (F0601.F0601_00 IS NULL OR F0601.F0602_00 IS NULL OR F0601.F0603_00 IS NULL OR F0601.F0606_00 IS NULL)';
END IF;
OPEN ref FOR I1;
RETURN ref;
END;
$$
LANGUAGE 'SQL';

Voici le message d'erreur :

Code:

ERROR: syntax error at or near "refcursor" at character 152

Merci pour votre aide

CREATE FUNCTION P0600 ( IN V0 INTEGER , IN V1 VARCHAR(5) , IN V2 VARCHAR(5) , IN V3 VARCHAR(8) , IN V4 VARCHAR(8) ) RETURNS SETOF p0600_t AS $$ DECLARE rec p0600_t%rowtype; I1 VARCHAR(5000); begin I1 := 'SELECT F0600.F0600_00, F0600_01, F0600_02, F0600_03, F0600_04, F0600_05, F0600_06, F0600_08, F0600_11, F0600_12, F0601.F0601_00, F0601.F0602_00, F0601.F0603_00, F0601.F0606_00, F0600_13, F0600_16, F0600_17, F0600_18, F0600.F0603_00, F0600.F0606_00, F0600_19, F0600_20, F0600_21, F0600_22, F0600_23, F0600_24 FROM F0600 AS F0600 LEFT OUTER JOIN F0609 AS F0609 ON F0609.F0600_00 = F0600.F0600_00 LEFT OUTER JOIN F0601 AS F0601 ON F0601.F0601_00 = F0609.F0601_00 WHERE F0600.F0001_00 = ''' || V1 || ''' AND F0600.F0002_00 = ''' || V2 || ''''; IF (V0 = 1) THEN I1 := I1 || ' AND ((F0601_03 >= ' || V3 || ' AND F0601_03 < ' || V4 || ') AND F0601.F0601_00 IS NOT NULL AND F0601.F0602_00 IS NOT NULL AND F0601.F0603_00 IS NOT NULL AND F0601.F0606_00 IS NOT NULL)'; ELSE I1 := I1 || ' AND (F0601.F0601_00 IS NULL OR F0601.F0602_00 IS NULL OR F0601.F0603_00 IS NULL OR F0601.F0606_00 IS NULL)'; END IF; FOR rec IN EXECUTE I1 LOOP RETURN NEXT rec; END LOOP; END; $$ LANGUAGE 'plpgsql';