SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function ignore (children 1)
     ExpressionList (children 1)
      Asterisk
   TablesInSelectQuery (children 3)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier order
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier user
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier uId
        Identifier user.id
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier product
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier pId
        Identifier product.id
