Padma Penumarthy created DRILL-4905:
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Summary: Push down the LIMIT to the parquet reader scan to limit
the numbers of records read
Key: DRILL-4905
URL: https://issues.apache.org/jira/browse/DRILL-4905
Project: Apache Drill
Issue Type: Bug
Components: Storage - Parquet
Affects Versions: 1.8.0
Reporter: Padma Penumarthy
Assignee: Padma Penumarthy
Fix For: 1.9.0
Limit the number of records read from disk by pushing down the limit to parquet
reader.
For queries like
select * from <table> limit N;
where N < size of Parquet row group, we are reading 32K/64k rows or entire row
group. This needs to be optimized to read only N rows.
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