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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