SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 5)
    Identifier id
    Function max (children 1)
     ExpressionList (children 1)
      Identifier value1
    Function max (children 1)
     ExpressionList (children 1)
      Identifier value2
    Function max (children 1)
     ExpressionList (children 1)
      Identifier value3
    Function max (children 1)
     ExpressionList (children 1)
      Identifier value4
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_table_signed_values
   ExpressionList (children 1)
    Identifier id
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier id
