SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    ColumnsRegexpMatcher (children 1)
     ColumnsTransformerList (children 2)
      ColumnsApplyTransformer
      ColumnsApplyTransformer
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier columns_transformers