SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    QualifiedAsterisk (children 2)
     Identifier a
     ColumnsTransformerList (children 2)
      ColumnsApplyTransformer
      ColumnsApplyTransformer
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier columns_transformers (alias a)