Sushil Mohanty created LENS-603:
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Summary: Skip expression in columnar rewriter
Key: LENS-603
URL: https://issues.apache.org/jira/browse/LENS-603
Project: Apache Lens
Issue Type: Bug
Reporter: Sushil Mohanty
Assignee: Sushil Mohanty
There are certain cases where expressions has conditions which needs to be
applied for each resultant row. For eg. sum(case when city_dim.city_name =
'abc' then total_count when city_dim.city_name is null then 0 end) . Columnar
rewriter is rewriting such expression as fact subquery and passing the result
to main query. We should skip such rewrite and do it only once in the main
query.
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