What is query processing engine?

What is a query engine?

At a high level, a query engine is a piece of software that sits on top of a database or server and executes queries against data in that database or server to provide answers for users or applications. More specifically, a SQL query engine interprets SQL commands and language to access data in relational systems.

What is query processing?

Definition. Query processing denotes the compilation and execution of a query specification usually expressed in a declarative database query language such as the structured query language (SQL). Query processing consists of a compile-time phase and a runtime phase.

What is query processor in computer?

In a relational database system the query processor is the module responsible for executing database queries. The query processor receives as input queries in the form of SQL text, parses and optimizes them, and completes their execution by employing specific data access methods and database operator implementations.

What is called query execution engine?

Query Executor (or query execution engine) It acts as a dispatcher for all commands in the execution plan. It iterates through all the commands in the plan until the batch is complete. And it interacts with the storage engine to retrieve and update data from tables and indexes.