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https://issues.apache.org/jira/browse/DRILL-7199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16827130#comment-16827130
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ASF GitHub Bot commented on DRILL-7199:
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dvjyothsna commented on pull request #1771: DRILL-7199: Optimize population of
metadata for non-interesting columns
URL: https://github.com/apache/drill/pull/1771
Currently the non-interesting column metadata is populated for all types of
metadata including rowgroup metadata. It's a huge overkill if there are large
number of row groups. With this PR, non-interesting column metadata is
populated only once when all the other types of metadata is populated in the
BaseParquetMetadataProvider.java. This optimization reduced the planning time
from 17 sec to 5 sec when there are 35000 row groups.
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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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