Table spooling is a technique used in database management systems to temporarily store data in a spool table in order to improve performance. It is commonly used when a query is expected to return a large amount of data, and the database needs to optimize the process of retrieving and processing the data. While table spooling can be beneficial in certain situations, there are some drawbacks to consider, and in some cases, it may be preferable to avoid using table spooling.
One of the main drawbacks of table spooling is that it can lead to increased memory usage. When a query is spooled, the data is stored in memory, which can put a strain on the database server, especially if the data set is large. Additionally, table spooling can also impact performance if the spool table is not properly managed. If the spool table is not dropped after the query is complete, it can continue to occupy space on the server and affect the performance of subsequent queries.
