3/11/2024 0 Comments Query processing in dbmsThe SQL Server query optimizer first generates a set of feasible query plans for a query or batch of T-SQL code submitted by the database engine to query optimizer. Prior to SQL Server 2017, query processing was a uniform process with a certain set of steps. This improved query plan quality is Adaptive Query Processing. In SQL Server 2017, Microsoft went one step further and worked on improving the query plan quality. You can read more about Query Store in Monitor Query Performance Using Query Store in SQL Server. Any point in time these plans can be reviewed, and the user can use plan forcing to enforce the query processor to select and use a specific query plan for execution. Query store is a feature to persist query execution plans and analyze the history of query plans to identify the queries that can cause performance bottlenecks. Query Store monitors query performance and provides methods to choose better query plans for execution. In SQL Server 2016, Microsoft introduced Query Store. Every so often, Microsoft includes new feature and functionality in SQL Server to improve query performance to help their users. Query performance is always a subject of research and innovation. This method is available in SQL Server (starting with SQL Server 2017 (14.x)) and Azure SQL Database. Adaptive query processing is the latest, improved query processing feature introduced in the SQL Server database engine.
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