[jira] [Assigned] (DRILL-5093) Explain plan shows all partitions when query scans all partitions, and filter pushdown is used with metadata caching.

["Arina Ielchiieva (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-5093?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arina Ielchiieva reassigned DRILL-5093:
---------------------------------------

    Assignee:     (was: Jinfeng Ni)

> 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
>            Priority: Major
>         Attachments: 0_0_1.parquet, 0_0_2.parquet, 0_0_3.parquet, 0_0_4.parquet, 0_0_5.parquet, drill.parquet_metadata
>
>
> 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 where int_id = -2000 or int_id = 0 or int_id = 4000 or int_id is null or int_id = 10000;
> +------+------+
> | text | json |
> +------+------+
> | 00-00    Screen
> 00-01      Project(*=[$0])
> 00-02        Project(T62¦¦*=[$0])
> 00-03          SelectionVectorRemover
> 00-04            Filter(condition=[OR(=($1, -2000), =($1, 0), =($1, 4000), IS NULL($1), =($1, 10000))])
> 00-05              Project(T62¦¦*=[$0], int_id=[$1])
> 00-06                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=[`*`]]])
> To reproduce the problem, put the attached files into a directory. Then create the metadata:
> refresh table metadata dfs.`path_to_directory`;
> For example, if you put the files in /drill/testdata/filter/orders_parts_metadata, then run this sql command
> refresh table metadata dfs.`/drill/testdata/filter/orders_parts_metadata`;
> Here is the same query with the same table without metadata caching.
> 0: jdbc:drill:zk=10.10.100.186:5181/drill/rho> explain plan for select \* from orders_parts where int_id = -2000 or int_id = 0 or int_id = 4000 or int_id is null or int_id = 10000;
> +------+------+
> | text | json |
> +------+------+
> | 00-00    Screen
> 00-01      Project(*=[$0])
> 00-02        Project(T63¦¦*=[$0])
> 00-03          SelectionVectorRemover
> 00-04            Filter(condition=[OR(=($1, -2000), =($1, 0), =($1, 4000), IS NULL($1), =($1, 10000))])
> 00-05              Project(T63¦¦*=[$0], int_id=[$1])
> 00-06                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
(v7.6.14#76016)