SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function count (alias x) (children 1)
     ExpressionList
   Function notEquals (children 1)
    ExpressionList (children 2)
     Identifier x
     Function toNullable (children 1)
      ExpressionList (children 1)
       Literal UInt64_0