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https://issues.apache.org/jira/browse/SPARK-45846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18049074#comment-18049074
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Dipanshu Pandey edited comment on SPARK-45846 at 1/5/26 7:27 AM:
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Hi [~manisethu] ,
Yes when broadcast joins are disabled, Spark falls back to {*}Broadcast Nested
Loop Join (BNLJ){*}, as seen in the physical plan below.
With broadcast disabled ({{{}autoBroadcastJoinThreshold = -1{}}}):
{code:java}
Physical Plan:
BroadcastNestedLoopJoinExec(
buildSide=BuildRight,
joinType=LeftAnti
)
{code}
was (Author: JIRAUSER311986):
Hi [~manisethu] ,
Yes when broadcast joins are disabled, Spark falls back to {*}Broadcast Nested
Loop Join (BNLJ){*}, as seen in the physical plan below.
With broadcast disabled ({{{}autoBroadcastJoinThreshold = -1{}}}):
{code:java}
With Broadcast Disabled (autoBroadcastJoinThreshold = -1):
Physical Plan:
BroadcastNestedLoopJoinExec(
buildSide=BuildRight,
joinType=LeftAnti
)
{code}
> spark.sql.optimizeNullAwareAntiJoin should respect
> spark.sql.autoBroadcastJoinThreshold
> ---------------------------------------------------------------------------------------
>
> Key: SPARK-45846
> URL: https://issues.apache.org/jira/browse/SPARK-45846
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 4.0.0
> Reporter: Chao Sun
> Priority: Major
> Labels: pull-request-available
>
> Normally broadcast join can be disabled when users set
> {{spark.sql.autoBroadcastJoinThreshold}} to -1. However this doesn't apply to
> {{spark.sql.optimizeNullAwareAntiJoin}}:
> {code}
> case j @ ExtractSingleColumnNullAwareAntiJoin(leftKeys, rightKeys) =>
> Seq(joins.BroadcastHashJoinExec(leftKeys, rightKeys, LeftAnti,
> BuildRight,
> None, planLater(j.left), planLater(j.right), isNullAwareAntiJoin =
> true))
> {code}
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