SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 4)
    Identifier d
    Identifier d.Tuple(a UInt64, b String).a
    Identifier d.Array(Dynamic).Variant(String, UInt64).UInt64
    Identifier d.Array(Variant(String, UInt64)).UInt64
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test
 Identifier Null
