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Implementing Siebel Business Applications on DB2 UDB for z/OS > Maintenance Considerations for z/OS > Enabling DB2 Dynamic Statement Caching > How to Invalidate Cached StatementsAfter DB2 prepares a SQL statement and places it in the global statement cache, it is reused. If you are performing SQL tuning and you want to force DB2 to prepare and reoptimize a cached statement, the global SQL statement cache must be invalidated. To invalidate an entry in the global statement cache for a specific SQL statement, one of the tables referenced by the SQL statement or the table catalog statistics must be altered in some way. You can invalidate a dynamically cached statement using one of the following methods:
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