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https://issues.apache.org/jira/browse/DRILL-6865?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Volodymyr Vysotskyi updated DRILL-6865:
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Summary: Query returns wrong result when filter pruning happens (was:
Filter is not removed from the plan when parquet table with single row group is
queried)
> Query returns wrong result when filter pruning happens
> ------------------------------------------------------
>
> Key: DRILL-6865
> URL: https://issues.apache.org/jira/browse/DRILL-6865
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - Parquet
> Affects Versions: 1.14.0
> Reporter: Volodymyr Vysotskyi
> Assignee: Volodymyr Vysotskyi
> Priority: Major
> Fix For: 1.15.0
>
>
> In DRILL-5796 was implemented removing the filter from the plan when some (or
> all) row groups of parquet table fully match the filter.
> But for the case, when parquet table has a single row group, the filter is
> left in the plan:
> {code:sql}
> create table dfs.tmp.`singleRowGroupTable` as select * from
> cp.`tpch/nation.parquet`;
> explain plan for select * from dfs.tmp.`singleRowGroupTable` where
> n_nationkey > -1;
> {code}
> returns plan
> {noformat}
> 00-00 Screen
> 00-01 Project(**=[$0])
> 00-02 Project(T0¦¦**=[$0])
> 00-03 SelectionVectorRemover
> 00-04 Filter(condition=[>($1, -1)])
> 00-05 Project(T0¦¦**=[$0], n_nationkey=[$1])
> 00-06 Scan(table=[[dfs, tmp, singleRowGroupTable]],
> groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath
> [path=file:/tmp/singleRowGroupTable]],
> selectionRoot=file:/tmp/singleRowGroupTable, numFiles=1, numRowGroups=1,
> usedMetadataFile=false, columns=[`**`, `n_nationkey`]]])
> {noformat}
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