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https://issues.apache.org/jira/browse/SPARK-26769?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcelo Vanzin updated SPARK-26769:
-----------------------------------
Component/s: (was: Spark Core)
SQL
> partition prunning in inner join
> --------------------------------
>
> Key: SPARK-26769
> URL: https://issues.apache.org/jira/browse/SPARK-26769
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: nhufas
> Priority: Major
> Labels: PartitionPruner
>
> When joining a partitioned parquet table with another table by partition
> column it should prunne partitions from partitioned table based on another
> table values.
> example:
> tableA parquet table partitioned be part_filter
> tableB table with column with partition values
>
> tableA is partitioned by part_A,part_B,part_C,part_D
> tableB is a single column with 2 rows having part_A and part_B as values.
>
> doing
> select * from tableA inner join tableB on
> tableA.part_filter=tableB.part_filter
> should generate a partition prunning on tableA based on tableB values (in
> this case scanning only 2 partitions) but it wll read all 4 partitions from
> tableA only filter the results.
>
> note: this kind of approach works on Hive (filtering tableA partitions)
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