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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-7199) Optimize the time taken to populate column statistics for non-interesting columns
Date Wed, 01 May 2019 19:09:00 GMT

    [ https://issues.apache.org/jira/browse/DRILL-7199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16831188#comment-16831188
] 

ASF GitHub Bot commented on DRILL-7199:
---------------------------------------

dvjyothsna commented on pull request #1771: DRILL-7199: Optimize population of metadata for
non-interesting columns
URL: https://github.com/apache/drill/pull/1771#discussion_r280180122
 
 

 ##########
 File path: exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/BaseParquetMetadataProvider.java
 ##########
 @@ -87,6 +88,7 @@
   private TableMetadata tableMetadata;
   private List<PartitionMetadata> partitions;
   private Map<Path, FileMetadata> files;
+  private NonInterestingColumnsMetadata nonInterestingColumnsMetadata;
 
 Review comment:
   Some of the unit tests actually use the metadata cache files from older versions. 
 
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> Optimize the time taken to populate column statistics for non-interesting columns
> ---------------------------------------------------------------------------------
>
>                 Key: DRILL-7199
>                 URL: https://issues.apache.org/jira/browse/DRILL-7199
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Venkata Jyothsna Donapati
>            Assignee: Venkata Jyothsna Donapati
>            Priority: Minor
>             Fix For: 1.17.0
>
>   Original Estimate: 48h
>  Remaining Estimate: 48h
>
> Currently populating column statistics for non-interesting columns very long since it
is populated for every row group. Since non-interesting column statistics are common for the
table, it can be populated once and can be reused.



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