[ https://issues.apache.org/jira/browse/SPARK-35703?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chao Sun updated SPARK-35703: ----------------------------- Summary: Relax constraint for Spark bucket join and remove HashClusteredDistribution (was: Remove HashClusteredDistribution) > Relax constraint for Spark bucket join and remove HashClusteredDistribution > --------------------------------------------------------------------------- > > Key: SPARK-35703 > URL: https://issues.apache.org/jira/browse/SPARK-35703 > Project: Spark > Issue Type: Improvement > Components: SQL > Affects Versions: 3.2.0 > Reporter: Chao Sun > Priority: Major > > Currently Spark has {{HashClusteredDistribution}} and > {{ClusteredDistribution}}. The only difference between the two is that the > former is more strict when deciding whether bucket join is allowed to avoid > shuffle: comparing to the latter, it requires *exact* match between the > clustering keys from the output partitioning (i.e., {{HashPartitioning}}) and > the join keys. However, this is unnecessary, as we should be able to avoid > shuffle when the set of clustering keys is a subset of join keys, just like > {{ClusteredDistribution}}. -- 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