pub unsafe fn ExecBuildUpdateProjection(
    arg_targetList: *mut List,
    arg_evalTargetList: bool,
    arg_targetColnos: *mut List,
    arg_relDesc: TupleDesc,
    arg_econtext: *mut ExprContext,
    arg_slot: *mut TupleTableSlot,
    arg_parent: *mut PlanState
) -> *mut ProjectionInfo