OCLOperators ExecutePS

selfVM.ExecutePS() is used to use the power and speed of the database to find a subset of objects of a certain type in a ViewModel.

In the example below the ExecutePS is used to look up License objects with ps (avoiding traversing all existing in memory).

The PS-evaluated expression (translated to sql and executed in DB) is defined in a ViewModelColumn of its own that is not referenced by any UI

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