Yuming Wang created SPARK-42513:
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Summary: Push topK through join
Key: SPARK-42513
URL: https://issues.apache.org/jira/browse/SPARK-42513
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.4.0
Reporter: Yuming Wang
{code:scala}
spark.range(100000000).selectExpr("id % 10000 as a", "id as
b").write.saveAsTable("t1")
spark.range(100000000).selectExpr("id % 10000 as x", "id as
y").write.saveAsTable("t2")
sql("select * from t1 left join t2 on a = x order by b limit 5").collect()
spark.sql("set
spark.sql.optimizer.excludedRules=org.apache.spark.sql.catalyst.optimizer.LimitPushDown")
sql("select * from t1 left join t2 on a = x order by b limit 5").collect()
{code}
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