[teiid-issues] [JBoss JIRA] (TEIID-2190) Key usage can remove predicates
Steven Hawkins (JIRA)
jira-events at lists.jboss.org
Tue Nov 20 10:47:22 EST 2012
[ https://issues.jboss.org/browse/TEIID-2190?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steven Hawkins closed TEIID-2190.
---------------------------------
> 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: 7.7.2, 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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