SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function max (children 1)
     ExpressionList (children 1)
      Identifier x1
    Identifier x2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test
   ExpressionList (children 2)
    Literal Int64_-2
    Literal Int64_-1