Expression index may be not used for derived fields or view fields
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Key: CORE-4118
URL: http://tracker.firebirdsql.org/browse/CORE-4118
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 2.5.2 Update 1, 2.5.2, 2.5.1, 2.5.0, 3.0 Initial
Reporter: Dmitry Yemanov
Test case:
create table t (id int, d timestamp);
create index itd on t computed (cast(d as date));
select * from t
where cast(d as date) = current_date
-- PLAN (T INDEX (ITD))
select * from (select id, cast(d as date) as d from t)
where d = current_date
-- PLAN (T NATURAL)
-- expected:
-- PLAN (T INDEX (ITD))
--
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