InsertQuery   (children 3)
 Identifier insert_select_dst
 ExpressionList (children 1)
  ColumnsRegexpMatcher (children 1)
   ColumnsTransformerList (children 1)
    ColumnsExceptTransformer (children 2)
     Identifier middle_a
     Identifier middle_b
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Asterisk
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier insert_select_src
