Davies Liu created SPARK-12213: ---------------------------------- Summary: Query with only one distinct should not having on expand Key: SPARK-12213 URL: https://issues.apache.org/jira/browse/SPARK-12213 Project: Spark Issue Type: Improvement Reporter: Davies Liu
Expand will double the number of records, slow down projection and aggregation, it's better to generate a plan without Expand for a query with only one distinct (for example, ss_max in TPCDS) -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org