[jira] [Commented] (SPARK-38771) Introduce adaptive Bloom filter Join to reduce spilling to disk when doing SortMergeJoin

["Apache Spark (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-38771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17516274#comment-17516274 ] 

Apache Spark commented on SPARK-38771:
--------------------------------------

User 'wangyum' has created a pull request for this issue:
https://github.com/apache/spark/pull/36046

> Introduce adaptive Bloom filter Join to reduce spilling to disk when doing SortMergeJoin 
> -----------------------------------------------------------------------------------------
>
>                 Key: SPARK-38771
>                 URL: https://issues.apache.org/jira/browse/SPARK-38771
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.4.0
>            Reporter: Yuming Wang
>            Priority: Major
>         Attachments: Special case.png
>
>
> Insert a bloom filter on one side of the join if it may be spill when sorting and the other side less than 100000000L rows.
> A special case:
> {code:java}
> sql("set spark.sql.autoBroadcastJoinThreshold=10000")
> sql("CREATE TABLE t1 using parquet AS SELECT id AS a, id AS b, id AS c FROM range(200000000L)")
> sql("CREATE TABLE t2 using parquet AS SELECT id AS x, id AS y FROM range(8000000)")
> sql("""SELECT a, b, c, x, y FROM t1 JOIN t2 ON t1.a = t2.x where t2.y = 1""").collect()
> {code}
>  !Special case.png! 



--
This message was sent by Atlassian Jira
(v8.20.1#820001)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org