[ https://issues.apache.org/jira/browse/DRILL-4905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Rahul Challapalli closed DRILL-4905. ------------------------------------ Verified and tests are automated [1] [1] https://github.com/mapr/drill-test-framework/tree/master/framework/resources/Functional/parquet_storage/parquet_generic > 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. > -- This message was sent by Atlassian JIRA (v6.3.4#6332)