Database Software

Hi,

I'm getting errors when generating the XML using the ORDER BY clause in the XMLAgg function. Although, running the SQL directly in SQL Plus doesn't have any problem.

Here is the PL/SQL sample.
DECLARE
vX_XML SYS.XMLTYPE;
vCL_XML CLOB;

BEGIN
SELECT XMLElement("GROUP",
XMLAttributes(Group_Id AS "ID", Group_Name AS "NAME", Group_Description AS "DESC"),
XMLAgg(XMLElement("FIELD",
XMLAttributes(Field_Id AS "ID", Field_Description AS "DESC",
Table_Name AS "TAB_NM", Rule_Name AS "RULE_NM",
Field_Hierarchy_Depth AS "DOL_VAR_CALC")) ORDER BY Field_Description))
INTO vX_XML
FROM (SELECT g.Group_Id, g.Group_Name, g.Group_Description, f.Field_Id, f.Field_Description,
DECODE(f.Table_Name, 'ESTIMATES', 'E', 'LINE_ITEMS', 'L', NULL) Table_Name,
rt.Rule_Name,
CASE NVL(f.Field_Hierarchy_Depth, 0) WHEN 0 THEN 'N' ELSE 'Y' END Field_Hierarchy_Depth
FROM GROUPS g,
Rules r,
Rule_Types rt,
Fields f
WHERE g.Group_Id = 3087
AND r.Group_Id_Fk = g.Group_Id
AND rt.Rule_Type_Id = r.Rule_Type_Id_Fk
AND f.Field_Id = r.Field_Id_Fk) tab
GROUP BY Group_Id, Group_Name, Group_Description;

vCL_XML := vX_XML.GetCLOBVal();
END;
/

And, here are the errors.
ERROR at line 8:
ORA-06550: line 8, column 23:
PLS-00306: wrong number or types of arguments in call to 'XMLAGG'
ORA-06550: line 8, column 23:
PL/SQL: ORA-00904: "XMLAGG": invalid identifier
ORA-06550: line 6, column 5:
PL/SQL: SQL Statement ignored

Thanks in Advance.

BTW, we are using Oracle 9.2.0.4.