The threshold parameter in the query function restricts the number of objects returned in the query result set. This parameter can be useful, for example, in a graphical user interface where only a small number of items should be displayed. If you set the threshold parameter accordingly, it improves performance. The database query is faster and less data needs to transfer from the server to the client.
If the parameter is set to null, a threshold is not applied and all the qualifying objects are returned.
Example of a threshold parameter:
Specifies to return 50 qualifying objects.