Question: What does the option PoForceIsNull mean?

Answer: Hmm :), this a great FIBPlus feature. For example, you have a query:

delete from Table1 where Param1 =?Param1 and Param2 =?Param2

Suppose, that Param2 is null. Standard components simply set Param2 buffer to nil and that's all. But actually, it is necessary to send another query to a server:

delete from Table1 where Param1 =?Param1 and Param2 IS NULL

Otherwise, the server will not delete a necessary record as it just cannot find such a record. The PoNoForceIsNul option allows TpFIBQuery (and TpFIBDataSet) to change SQL with NULL parameter values if necessary. If you have record with NULL fields in your selecting query, the "delete" query won't work until you set PoNoForceIsNul to True.


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What a good job you did! Keep coding great pieces of fast and efficient software:) We started using FIBPlus back in 2001. Since then, every project we offer uses FIBPlus to connect to FirebirdSQL. You library has always been stable, flexible and rocket fast ! Our major project, an helpdesk/data mining application, concurrently used daily by more that a hundred technicians and analysts, uses FIBPlus. Now that FirebirdSQL 2.0 is available, we have been able to upgrade our application quickly and painlessly - that's another reason you can be proud of your work ! >>

Benoit Le Bourhis, Adhoc Innovations
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