Hans Zeller created TRAFODION-2320:
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Summary: Make subquery unnesting work with common subexpressions
Key: TRAFODION-2320
URL: https://issues.apache.org/jira/browse/TRAFODION-2320
Project: Apache Trafodion
Issue Type: Sub-task
Components: sql-cmp
Affects Versions: 2.1-incubating
Reporter: Hans Zeller
Assignee: Hans Zeller
The subquery unnesting code relies on a certain structure of the query tree,
with join and groupby nodes arranged in a certain way. If we have
CommonSubExprRef nodes present in the tree, the unnesting logic doesn't
recognize some of the patterns and subquery unnesting doesn't take place.
Hopefully we can somehow ignore these extra nodes in subquery unnesting.
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