Steven Hawkins created TEIID-2190:
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Summary: Key usage can remove predicates
Key: TEIID-2190
URL:
https://issues.jboss.org/browse/TEIID-2190
Project: Teiid
Issue Type: Feature Request
Components: Query Engine
Affects Versions: 7.4
Reporter: Steven Hawkins
Assignee: Steven Hawkins
Priority: Blocker
Fix For: 8.2
The implementation strategy for predicate realignment can drop non-column equi join
predicates and predicates involving the same column reused multiple times.
i.e.
create local temporary table x (e1 string, e2 integer, primary key (e1));
create local temporary table x1 (e1 string, e2 integer)
...
select x.e1 from x inner join x1 on x.e1 = x1.e1 and upper(x.e1) = x1.e2
May end up not applying the upper predicate.
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