misc subquery enhancements
--------------------------
Key: TEIID-1497
URL:
https://issues.jboss.org/browse/TEIID-1497
Project: Teiid
Issue Type: Feature Request
Components: Query Engine
Affects Versions: 7.4
Reporter: Steven Hawkins
Assignee: Steven Hawkins
Fix For: 7.4
Federated exists and scalar subqueries should be implicitly limited to not pull back extra
results.
The subquery aware evaluator should have a small cache to reuse correlated results.
uncorrelated subqueryin and some forms of quantified comparison should be processed as
dependent set criteria or use an indexed structure for teiid evaluation.
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