RAD Studio VCL Reference
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TQuery.UnPrepare Method

Frees the resources allocated for a previously prepared query.

Pascal
procedure UnPrepare;
C++
__fastcall UnPrepare();

Call UnPrepare to free the resources allocated for a previously prepared query on the server and client sides. 

Preparing a query consumes some database resources, so it is good practice for an application to unprepare a query once it is done using it. The UnPrepare method unprepares a query.

Note: When you change the text of a query at runtime, the query is automatically closed and unprepared.
 

 

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