[firebird-support] VIEW optimization

Hi All,

VIEW:
CREATE VIEW VIEW1 AS
SELECT RDB$RELATION_FIELDS.RDB$RELATION_NAME, RDB$FIELD_NAME FROM
RDB$RELATION_FIELDS
JOIN RDB$RELATIONS ON
RDB$RELATION_FIELDS.RDB$RELATION_NAME=RDB$RELATIONS.RDB$RELATION_NAME;

SELECT:
SELECT RDB$FIELD_NAME FROM VIEW1

PLAN:
PLAN JOIN (VIEW1 RDB$RELATION_FIELDS NATURAL, VIEW1 RDB$RELATIONS INDEX
(RDB$INDEX_0))


Plan contains the JOIN but that not needed for the selected field. Is
this an SQL standard thing or just Firebird's optimizer not smart enough?

Gabor


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