Github user StevenMPhillips commented on a diff in the pull request:
https://github.com/apache/drill/pull/186#discussion_r41051093
--- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/ParquetGroupScan.java
---
@@ -716,6 +726,7 @@ public String toString() {
return "ParquetGroupScan [entries=" + entries
+ ", selectionRoot=" + selectionRoot
+ ", numFiles=" + getEntries().size()
+ + ", usedCache=" + usedMetadataCache
--- End diff --
We only use the cache if there is a cache file for the root directory of the query.
I can change the name to useMetadataFile
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