Hive - How to know which execution engine I am currently using
The Hive execution engine is controlled by hive.execution.engine property. It can be either of the following:
mr(Map Reduce, default)tez(Tez execution, for Hadoop 2 only)spark(Spark execution, for Hive 1.1.0 onward).
The property can be read & updated using hive/beeline cli
- For reading -
SET hive.execution.engine; - For updating -
SET hive.execution.engine=tez;
If you want to programmatically get this value out, you must go for HiveClient which supports multiple ways like JDBC, Java, Python, PHP, Ruby, C++, etc.
References