SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Identifier col1
    Identifier col2
    Function ifNull (children 1)
     ExpressionList (children 2)
      Identifier col1
      Identifier col2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test1_00395
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier col1
    OrderByElement (children 1)
     Identifier col2