Yuming Wang created SPARK-32291: ----------------------------------- Summary: COALESCE should not reduce the child parallelism if it is Join Key: SPARK-32291 URL: https://issues.apache.org/jira/browse/SPARK-32291 Project: Spark Issue Type: Improvement Components: SQL Affects Versions: 3.1.0 Reporter: Yuming Wang Attachments: COALESCE.png
How to reproduce this issue: {code:scala} spark.range(100).createTempView("t1") spark.range(200).createTempView("t2") spark.sql("set spark.sql.autoBroadcastJoinThreshold=0") spark.sql("select /*+ COALESCE(1) */ t1.* from t1 join t2 on (t1.id = t2.id)").show {code} The dag is: -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org