Sorabh Hamirwasia created DRILL-6561:
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Summary: Lateral excluding the columns from output container
provided by projection push into rules
Key: DRILL-6561
URL: https://issues.apache.org/jira/browse/DRILL-6561
Project: Apache Drill
Issue Type: Improvement
Components: Execution - Relational Operators
Affects Versions: 1.14.0
Reporter: Sorabh Hamirwasia
Assignee: Sorabh Hamirwasia
Fix For: 1.14.0
With DRILL-6545, LateralPop will have information about list of columns to be
excluded from the Lateral output container. Mostly this is used to avoid
producing origin repeated column in Lateral output if it's not required from
the projection list. This is needed because in absence of it Lateral has to
copy the repeated column N number of times where N is the number of rows in
right incoming batch for each left incoming batch row. This copy was very
costly both from memory and latency perspective. Hence avoiding it is a must
for Lateral-Unnest case.
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