SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function emptyArrayToSingle (children 1)
     ExpressionList (children 1)
      Function arrayFilter (children 1)
       ExpressionList (children 2)
        Function lambda (children 1)
         ExpressionList (children 2)
          Function tuple (children 1)
           ExpressionList (children 1)
            Identifier x
          Function notEquals (children 1)
           ExpressionList (children 2)
            Identifier x
            Literal UInt64_99
        Function arrayJoin (children 1)
         ExpressionList (children 1)
          Literal Array_[Array_[UInt64_1, UInt64_2], Array_[UInt64_99], Array_[UInt64_4, UInt64_5, UInt64_6]]