Limitting the number of records in query

I like to limit the number of records retrieved in the query. I set Query All Records block property to NO, Query Array Size to the number I want to retrieve. Before doing that, I set form Preference - Array Processing checked. The result is form always retrieves all records meets the search condition. Could someone tell me what's wrong with it?

I do not understand why and what exactly you want to do. The query array size defines the number records your form should fetch at a time, i.e. if you have 100 records in the database and you set the array size to 20, forms will perform 5 fetch cycles to retrieve all records. However, this is transparent to the user and he will see all 100 records. This property is used for performance tuning when working with a large volume of records.

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