Basic Steps in Query Processing (Cont.) Parsing and translation translate the query into its internal form.This is then translated into relational algebra. Parser checks syntax,verifies relations Evaluation The query-execution engine takes a query-evaluation plan, executes that plan,and returns the answers to the query. Database System Concepts-6th Edition 12.4 ©Silberschat乜，Korth and SudarshanDatabase System Concepts - 6 12.4 ©Silberschatz, Korth and Sudarshan th Edition Basic Steps in Query Processing (Cont.) Parsing and translation translate the query into its internal form. This is then translated into relational algebra. Parser checks syntax, verifies relations Evaluation The query-execution engine takes a query-evaluation plan, executes that plan, and returns the answers to the query