Aman Sinha created DRILL-3412:
---------------------------------
Summary: Projections are not getting push down below Window
operator
Key: DRILL-3412
URL: https://issues.apache.org/jira/browse/DRILL-3412
Project: Apache Drill
Issue Type: Bug
Components: Query Planning & Optimization
Reporter: Aman Sinha
Assignee: Jinfeng Ni
The plan below shows that the 'star' column is being produced by the Scan and
subsequent Project. This indicates projection pushdown is not working as
desired when window function is present. The query produces correct results.
{code}
explain plan for select min(n_nationkey) over (partition by n_regionkey) from
cp.`tpch/nation.parquet` ;
00-00 Screen
00-01 Project(EXPR$0=[$0])
00-02 Project(w0$o0=[$3])
00-03 Window(window#0=[window(partition {2} order by [] range between
UNBOUNDED PRECEDING and UNBOUNDED FOLLOWING aggs [MIN($1)])])
00-04 SelectionVectorRemover
00-05 Sort(sort0=[$2], dir0=[ASC])
00-06 Project(T1¦¦*=[$0], n_nationkey=[$1], n_regionkey=[$2])
00-07 Scan(groupscan=[ParquetGroupScan
[entries=[ReadEntryWithPath [path=classpath:/tpch/nation.parquet]],
selectionRoot=/tpch/nation.parquet, numFiles=1, columns=[`*`]]])
{code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
