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)