[jira] [Created] (SPARK-26769) partition prunning in inner join

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

nhufas created SPARK-26769:
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             Summary: partition prunning in inner join
                 Key: SPARK-26769
                 URL: https://issues.apache.org/jira/browse/SPARK-26769
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 2.4.0
            Reporter: nhufas


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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