Robert Hou created DRILL-5093:
---------------------------------
Summary: Explain plan shows all partitions when query scans all
partitions, and filter pushdown is used with metadata caching.
Key: DRILL-5093
URL: https://issues.apache.org/jira/browse/DRILL-5093
Project: Apache Drill
Issue Type: Bug
Components: Query Planning & Optimization
Affects Versions: 1.9.0
Reporter: Robert Hou
Assignee: Jinfeng Ni
This query scans all the partitions because the partitions cannot be pruned.
When metadata caching is used, the explain plan shows all the partitions, when
it should only show the parent.
0: jdbc:drill:zk=10.10.100.186:5181/drill/rho> explain plan for select \* from
orders_parts_metadata;
+------+------+
| text | json |
+------+------+
| 00-00 Screen
00-01 Project(*=[$0])
00-02 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath
[path=/drill/testdata/filter/orders_parts_metadata/0_0_1.parquet],
ReadEntryWithPath
[path=/drill/testdata/filter/orders_parts_metadata/0_0_3.parquet],
ReadEntryWithPath
[path=/drill/testdata/filter/orders_parts_metadata/0_0_4.parquet],
ReadEntryWithPath
[path=/drill/testdata/filter/orders_parts_metadata/0_0_5.parquet],
ReadEntryWithPath
[path=/drill/testdata/filter/orders_parts_metadata/0_0_2.parquet]],
selectionRoot=/drill/testdata/filter/orders_parts_metadata, numFiles=5,
usedMetadataFile=true,
cacheFileRoot=/drill/testdata/filter/orders_parts_metadata, columns=[`*`]]])
Here is the same query with a table that does not have metadata caching.
0: jdbc:drill:zk=10.10.100.186:5181/drill/rho> explain plan for select \* from
orders_parts;
+------+------+
| text | json |
+------+------+
| 00-00 Screen
00-01 Project(*=[$0])
00-02 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath
[path=maprfs:///drill/testdata/filter/orders_parts]],
selectionRoot=maprfs:/drill/testdata/filter/orders_parts, numFiles=1,
usedMetadataFile=false, columns=[`*`]]])
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
