cgivre opened a new pull request #2024: DRILL-7641 Convert Excel Reader to use Streaming Reader URL: https://github.com/apache/drill/pull/2024 # [DRILL-7641](https://issues.apache.org/jira/browse/DRILL-7641): Convert Excel Reader to use Streaming Reader ## Description The current implementation of the Excel reader uses the Apache POI reader, which uses excessive amounts of memory. As a result, attempting to read large Excel files will cause out of memory errors. This PR converts the format plugin to use a streaming reader, based still on the POI library. The documentation for the streaming reader can be found here. [1]. This library was billed as a drop in replacement for the POI reader, however I had to make some minor changes to the batch reader to get this to work. Minor code cleanup as well. [1]: https://github.com/pjfanning/excel-streaming-reader ## Documentation No user visible changes. ## Testing All unit tests from the original plugin pass. Additionally, I tested this with large Excel files on my local machine and Drill was able to query them whereas before this PR, Drill would run out of memory.
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