Re: Refactor query normalization into core query jumbling

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От Sami Imseih
Тема Re: Refactor query normalization into core query jumbling
Дата
Msg-id CAA5RZ0t_CJs9ye1PPBy-e0ajZ-6FgKvNEoacW9keCtF_7Y2ycQ@mail.gmail.com
обсуждение исходный текст
Ответ на Re: Refactor query normalization into core query jumbling  (Sami Imseih <samimseih@gmail.com>)
Список pgsql-hackers
> >> backwards compatible. Basically, we keep JumbleState a non-constant,
> >> but provide core APIs for any operation, such as
> >> generate_normalized_query,
> >> that needs to modify the state. So, my approach was not about enforcing a
> >> read-only JumbleState, but about providing the API to dissuade an author
> >> from modifying a JumbleState.
>
> > Given the lack of public APIs to modify JumbleState today, I don't see how
> > an extension would do
> > modifications in a meaningful way, short of copying the code. I think we
> > should be a bit bolder here in
> > enforcing a convention, either clearly making it read-only or dropping the
> > argument again.
>
> Based on the discussion so far I am leaning towards making JumbleState
> read-only as described here [0]. I don't see how we can drop JumbleState
> completely from hooks, since normalization needs to occur on-demand
> by the extension.

Here is v4.

0001 - addresses the comments made by Bertrand.
0002 - makes JumbleState a constant when passed to post_parse_analyze
and updates all downstream code that consume the JumbleState. This
means we now need to copy the locations from JState into a local/temporary
array when generating the normalized string.

--
Sami Imseih
Amazon Web Services (AWS)

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