[jira] [Created] (DRILL-6865) Filter is not removed from the plan when parquet table with single row group is queried

["Volodymyr Vysotskyi (JIRA)" <ji...@apache.org>]

Volodymyr Vysotskyi created DRILL-6865:
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             Summary: Filter is not removed from the plan when parquet table with single row group is queried
                 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
             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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