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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