[jira] [Created] (SPARK-27956) Allow subqueries as partition filter

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

Johannes Mayer created SPARK-27956:
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             Summary: Allow subqueries as partition filter
                 Key: SPARK-27956
                 URL: https://issues.apache.org/jira/browse/SPARK-27956
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.3.0
            Reporter: Johannes Mayer


Subqueries are not pushed down as partition filters. See following example

 
{code:java}
create table user_mayerjoh.tab (c1 string)
partitioned by (c2 string)
stored as parquet;
{code}
 

 
{code:java}
explain select * from user_mayerjoh.tab where c2 < 1;{code}
 

  == Physical Plan ==

*(1) FileScan parquet user_mayerjoh.tab[c1#22,c2#23] Batched: true, Format: Parquet, Location: PrunedInMemoryFileIndex[], PartitionCount: 0, *PartitionFilters: [isnotnull(c2#23), (cast(c2#23 as int) < 1)]*, PushedFilters: [], ReadSchema: struct<c1:string>

 

 
{code:java}
explain select * from user_mayerjoh.tab where c2 < (select 1);{code}
 

== Physical Plan ==

 

+- *(1) FileScan parquet user_mayerjoh.tab[c1#30,c2#31] Batched: true, Format: Parquet, Location: PrunedInMemoryFileIndex[], PartitionCount: 0, *PartitionFilters: [isnotnull(c2#31)]*, PushedFilters: [], ReadSchema: struct<c1:string>

 

Is it possible to first execute the subquery and use the result as partition filter?



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