Steps To Industry-Leading Query Speed: Evolution of the Apache Doris Execution Engine

What makes a modern database system? The three key modules are query optimizer, execution engine, and storage engine. Among them, the role of execution engine to the DBMS is like the chef to a restaurant. This article focuses on the execution engine of the Apache Doris data warehouse, explaining the secret to its high performance.

To illustrate the role of the execution engine, let's follow the execution process of an SQL statement:

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