Allocates, opens, and parses cursor for a query.
procedure Prepare; virtual;
Call the Prepare method to allocate, open, and parse cursor for a query. Calling Prepare before executing a query improves application performance.
TCustomDADataSet automatically prepares a query if it is executed without being prepared first. After execution, TCustomDADataSet unprepares the query. When a query is executed a number of times, an application should always explicitly prepare the query to avoid multiple and unnecessary prepares and unprepares.
The UnPrepare method unprepares a query.
Note: When you change the text of a query at runtime, the query is automatically closed and unprepared.