Sort Merge Bucket. image by author as you can see, each branch of the join contains an exchange operator that represents the shuffle (notice that spark will not always use sort. Smb join can best be used when the tables are large.
(JMSE) Bucket sort in java - image credit : www.javamadesoeasy.com
So effectively its neither converting. However, to be set for a hive skew join we need the following parameter: For example, consider the following.
(JMSE) Bucket sort in java
At first, it is very important that the tables are created bucketed on the same join columns. The bucket sort algorithm then sorts the contents of each bucket. sort merge bucket (smb) join in hive is mainly used as there is no limit on file or partition or table join. Version 0.13.0 and later hive 0.13.0 introduced hive.auto.convert.join.use.nonstaged with a default of.
