Description: Plan reuse in the context of SQL query optimization refers to the ability to use an existing execution plan for a new query, allowing for time and resource savings in data processing. An execution plan is a representation of how a database management system (DBMS) will carry out a query, including the operations to be performed and the order in which they will be executed. Reusing these plans is crucial for improving query performance, as it avoids the need to recalculate the plan each time a similar query is executed. This technique is based on the principle that many queries can share common characteristics, allowing the DBMS to leverage previously generated execution plans. Plan reuse not only reduces the system’s workload but also minimizes response time for the end user, thereby improving overall system efficiency. Furthermore, this practice is especially valuable in environments where repetitive queries are performed or in high-volume data processing, as it helps optimize resource usage and maintain consistent database performance.
