consulta en query

Hola amigos tengo una situación algo extraña

el siguiente query corriendo desde el psql funciona sin problemas

SELECT c.relname AS Name
FROM pg_class c, pg_user u
WHERE c.relowner = u.usesysid AND c.relkind = 'r' AND
NOT EXISTS (SELECT 1 FROM pg_views WHERE viewname = c.relname)
AND c.relname !~ '^(pg_|sql_)'
UNION
SELECT c.relname AS Name
FROM pg_class c
WHERE c.relkind = 'r' AND NOT EXISTS
(SELECT 1 FROM pg_views WHERE viewname = c.relname)
AND NOT EXISTS (SELECT 1 FROM pg_user WHERE usesysid =
c.relowner)
AND c.relname !~ '^pg_'

ahora si lo corro desde php (4.3.4) en el log del postgresql recibo este
mensaje

LOG: statement: SELECT c.relname AS Name
FROM pg_class c, pg_user u WHERE c.relowner =
u.usesysid
AND c.relkind = 'r' AND NOT EXISTS
(SELECT 1 FROM pg_views WHERE viewname =
c.relname)
AND c.relname !~ '^(pg_|sql_)' UNION
SELECT c.relname AS Name FROM pg_class c
WHERE c.relkind = 'r' AND NOT EXISTS
(SELECT 1 FROM pg_views WHERE viewname =
c.relname)
AND NOT EXISTS (SELECT 1 FROM pg_user WHERE
usesysid = c.relowner)
AND c.relname !~ '^pg_'
ERROR: syntax error at or near "(" at character 286

si lo revisan bien son identicos, es mas copio el del log y lo corro en el
psql sin cambio alguno y corre sin problemas

e probado el query en psql con postgresql 8.1 y 7.4 y recibo el mismo problema
cuando lo invoco desde php, que puede estar pasando?

saludos

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