Sorabh Hamirwasia created DRILL-6503:
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Summary: Minor Performance fixes in lateral
Key: DRILL-6503
URL: https://issues.apache.org/jira/browse/DRILL-6503
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
In LateralJoin currently the copying of data from left and right inputs is not
very efficient. Basically for the number of rows seen in right side (let say
n), it does copy row by row across all vectors in left and right inputs.
Whereas if it copies each vectors (n times) and then move to next vector that
can help in improving the performance.
Also today MemoryManager::update can be called in lateral multiple times for
left and right incoming. These calls are found to be very expensive hence make
sure it's called only once for every new incoming from both left and right.
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