Rahul Challapalli created DRILL-4256:
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Summary: Performance regression in hive planning
Key: DRILL-4256
URL: https://issues.apache.org/jira/browse/DRILL-4256
Project: Apache Drill
Issue Type: Bug
Components: Functions - Hive, Query Planning & Optimization
Affects Versions: 1.5.0
Reporter: Rahul Challapalli
Commit # : 76f41e18207e3e3e987fef56ee7f1695dd6ddd7a
The fix for reading hive tables backed by hbase caused a performance regression. The data
set used in the below test has ~3700 partitions and the filter in the query would ensure only
1 partition get selected.
{code}
Commit : 76f41e18207e3e3e987fef56ee7f1695dd6ddd7a
Query : explain plan for select count(*) from lineitem_partitioned where `year`=2015 and `month`=1
and `day` =1;
Time : ~25 seconds
{code}
{code}
Commit : 1ea3d6c3f144614caf460648c1c27c6d0f5b06b8
Query : explain plan for select count(*) from lineitem_partitioned where `year`=2015 and `month`=1
and `day` =1;
Time : ~6.5 seconds
{code}
Since the data is large, I couldn't attach it here. Reach out to me if you need additional
information.
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