Hive on Spark EXPLAIN statement

【文件属性】：
文件名称：Hive on Spark EXPLAIN statement
文件大小：179KB
文件格式：PDF
更新时间：2020-03-27 13:39:09
hive SMB join SMB map Hive on Spark EXPLAIN statement : 讲述了 Common Join / Map join / Bucket Map Join / Sorted Merge Bucket Map Join / skew join 在explain 中的 树结构 。In Hive, command EXPLAIN can be used to show the execution plan of a query. The language manual has lots of good information. For Hive on Spark, this command itself is not changed. It behaves the same as before. It still shows the dependency graph, and plans for each stage. However, if the query engine (hive.execution.engine) is set to “spark”, it shows the execution plan with the Spark query engine, instead of the default (“mr”) MapReduce query engine