Postgres is most likely killing the functions when it's hits some stack or memory limit.
Mark Cave-Ayland wrote:
Hi everyone,
I'm trying to write a recursive plpgsql function in PostgreSQL 7.4.2 that given a tree node id (ictid) will return all the nodes below it in the tree, one row per node. When I try and execute the function I get the following error message:
CONTEXT: PL/pgSQL function "findsubcategories" line 15 at for over select rows PL/pgSQL function "findsubcategories" line 15 at for over select rows PL/pgSQL function "findsubcategories" line 15 at for over select rows PL/pgSQL function "findsubcategories" line 15 at for over select rows ...repeated many many times...
Can anyone see where I am going wrong in my function? I found a reference to "for over select rows" in pl_funcs.c but it appears to be denoting a statement type? The code is given below:
CREATE OR REPLACE FUNCTION plpgsql.findsubcategories(int8) RETURNS SETOF inventory.cattree AS ' DECLARE _row inventory.cattree%ROWTYPE; _nrow inventory.cattree%ROWTYPE; _id ALIAS FOR $1;
BEGIN -- Select the starting tree entry FOR _row IN SELECT * FROM inventory.cattree WHERE parentictid = _id LOOP
-- Return this category RETURN NEXT _row;
-- Recurse for each child function FOR _nrow IN SELECT * FROM plpgsql.findsubcategories(_row.parentictid) LOOP RETURN NEXT _nrow; END LOOP;
END LOOP;
-- Return the entire set RETURN; END ' LANGUAGE 'plpgsql';
If this is not possible, can anyone else suggest a way of getting the required result?
Many thanks,
Mark.
---
Mark Cave-Ayland Webbased Ltd. Tamar Science Park Derriford Plymouth PL6 8BX England
Tel: +44 (0)1752 764445 Fax: +44 (0)1752 764446
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