Re: temporary table / recursion

["Robert Wimmer" <seppwimmer(at)hotmail(dot)com>]

> Not like that, use the execute command inside your function.
> Here is the description and example.
> http://www.postgresql.org/docs/8.0/static/plpgsql-statements.html

that was what I tried before the PREPARE EXECUTE example and it did not 
work.
so i will try it again

*** snippet ***

CREATE FUNCTION recurs.scan(p_start INTEGER) RETURNS SETOF recurs.tree AS $$
DECLARE tmp RECORD;
BEGIN

 EXECUTE 'CREATE TEMP TABLE recurs_temp (id INT, parent_id INT, label 
TEXT)';

 INSERT INTO recurs_temp SELECT * FROM recurs.tree WHERE id = p_start;  -- 
first node
 EXECUTE recurs.walk(p_start); -- create tree
 FOR tmp IN SELECT * FROM recurs_temp LOOP RETURN NEXT tmp; END LOOP;

 EXECUTE 'DROP TABLE recurs_temp';

 RETURN;

END; $$
LANGUAGE plpgsql;

****

and the output ...

****

recurs=# SELECT * FROM recurs.scan(1);
id | parent_id |   label
----+-----------+-----------
 1 |           | 1
 4 |         2 | 1.1.1
 5 |         2 | 1.1.2
 6 |         2 | 1.1.3
 7 |         2 | 1.1.4
 8 |         2 | 1.1.5
11 |        10 | 1.1.6.2
13 |        12 | 1.1.6.3.1
12 |        10 | 1.1.6.3
10 |         9 | 1.1.6.1
 9 |         2 | 1.1.6
 2 |         1 | 1.1
14 |         3 | 1.2.1
15 |         3 | 1.2.2
16 |         3 | 1.2.3
 3 |         1 | 1.2
(16 rows)

recurs=# \dt
No relations found.
recurs=# SELECT * FROM recurs.scan(1);
ERROR:  relation with OID 2084590 does not exist
KONTEXT:  SQL statement "INSERT INTO recurs_temp SELECT * FROM recurs.tree 
WHERE id =  $1 "
PL/pgSQL function "scan" line 6 at SQL statement
recurs=# \dt
No relations found.

****


so i dont know what went wrong now ...

i am using Postgres 8.0.3 on Windows XP

nevertheless thanx for your help

> --Imad
> www.EnterpriseDB.com
>
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