There are several components of Hive Architecture. Such as –
User Interface – Basically, it calls the execute interface to the driver. Further, driver creates a session handle to the query. Then sends the query to the compiler to generate an execution plan for it.
Metastore – It is used to Send the metadata to the compiler. Basically, for the execution of the query on receiving the send MetaData request.
Compiler- It generates the execution plan. Especially, that is a DAG of stages where each stage is either a metadata operation, a map or reduce job or an operation on HDFS.
Execute Engine- Basically, by managing the dependencies for submitting each of these stages to the relevant components we use Execute engine.
