cgivre opened a new pull request #2092: URL: https://github.com/apache/drill/pull/2092
# [DRILL-7763](https://issues.apache.org/jira/browse/DRILL-7763): Add Limit Pushdown to File Based Storage Plugins ## Description As currently implemented, when querying a file, Drill will read the entire file even if a limit is specified in the query. This PR does a few things: Refactors the `EasyGroupScan`, `EasySubScan`, and `EasyFormatConfig` to allow the option of pushing down limits. Applies this to all the EVF based format plugins which are: LogRegex, PCAP, SPSS, Esri, Excel and Text (CSV). Due to JSON's fluid schema, it would be unwise to adopt the limit pushdown as it could result in very inconsistent schemata. ## Documentation No user visible changes. Queries with limits on large files are considerably faster. ## Testing All existing unit tests are run. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
