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Posted to issues@spark.apache.org by "Yuming Wang (Jira)" <ji...@apache.org> on 2019/10/16 02:43:00 UTC
[jira] [Commented] (SPARK-29485) Improve BooleanSimplification
performance
[ https://issues.apache.org/jira/browse/SPARK-29485?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16952459#comment-16952459 ]
Yuming Wang commented on SPARK-29485:
-------------------------------------
cc [~manifoldQAQ]
> Improve BooleanSimplification performance
> -----------------------------------------
>
> Key: SPARK-29485
> URL: https://issues.apache.org/jira/browse/SPARK-29485
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Yuming Wang
> Priority: Major
>
> How to reproduce:
> {code:scala}
> val columns = (0 until 1000).map{ i => s"id as id$i"}
> spark.range(1).selectExpr(columns : _*).write.saveAsTable("t1")
> spark.range(1).selectExpr(columns : _*).write.saveAsTable("t2")
> RuleExecutor.resetMetrics()
> spark.table("t1").join(spark.table("t2"), (1 until 800).map(i => s"id${i}")).show(false)
> logWarning(RuleExecutor.dumpTimeSpent())
> {code}
> {noformat}
> === Metrics of Analyzer/Optimizer Rules ===
> Total number of runs: 20157
> Total time: 12.918977054 seconds
> Rule Effective Time / Total Time Effective Runs / Total Runs
> org.apache.spark.sql.catalyst.optimizer.BooleanSimplification 0 / 9835799647 0 / 3
> org.apache.spark.sql.catalyst.optimizer.InferFiltersFromConstraints 1532613008 / 1532613008 1 / 1
> ...
> {noformat}
> If we disable {{BooleanSimplification}}:
> {noformat}
> === Metrics of Analyzer/Optimizer Rules ===
> Total number of runs: 20154
> Total time: 3.715814437 seconds
> Rule Effective Time / Total Time Effective Runs / Total Runs
> org.apache.spark.sql.catalyst.optimizer.InferFiltersFromConstraints 2081338100 / 2081338100 1 / 1
> ...
> {noformat}
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