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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2021/03/19 16:14:00 UTC
[jira] [Commented] (SPARK-34802) Optimize Optimizer defaultBatches
rule order
[ https://issues.apache.org/jira/browse/SPARK-34802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17304997#comment-17304997 ]
Apache Spark commented on SPARK-34802:
--------------------------------------
User 'wangyum' has created a pull request for this issue:
https://github.com/apache/spark/pull/31901
> Optimize Optimizer defaultBatches rule order
> --------------------------------------------
>
> Key: SPARK-34802
> URL: https://issues.apache.org/jira/browse/SPARK-34802
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Yuming Wang
> Priority: Major
>
> For example:
> {code:scala}
> spark.sql("CREATE TABLE t1 using parquet AS SELECT id AS a FROM range(10)")
> spark.sql("CREATE TABLE t2 using parquet AS SELECT id AS b FROM range(10)")
> spark.sql("SELECT * FROM t1 INNER JOIN t2 ON (a = b AND true)").explain
> {code}
> {noformat}
> === Applying Rule org.apache.spark.sql.catalyst.optimizer.PushDownPredicates ===
> !Join Inner, ((a#4L = b#5L) AND true) Join Inner, (a#4L = b#5L)
> !:- Relation default.t1[a#4L] parquet :- Filter true
> !+- Relation default.t2[b#5L] parquet : +- Relation default.t1[a#4L] parquet
> ! +- Relation default.t2[b#5L] parquet
> {noformat}
> BooleanSimplification should before PushDownPredicates.
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