Re: Timeline following for logical slots

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От Alvaro Herrera
Тема Re: Timeline following for logical slots
Дата
Msg-id 20160502194749.GA30397@alvherre.pgsql
обсуждение исходный текст
Ответ на Re: Timeline following for logical slots  (Andres Freund <andres@anarazel.de>)
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Andres Freund wrote:

> -   /* oldest LSN that the client has acked receipt for */
> +   /*
> +    * Oldest LSN that the client has acked receipt for.  This is used as the
> +    * start_lsn point in case the client doesn't specify one, and also as a
> +    * safety measure to back off in case the client specifies a start_lsn
> +    * that's further in the future than this value.
> +    */
>     XLogRecPtr  confirmed_flush;
> 
> This is the wrong way round. confirmed_flush is used if the client's
> start_lsn is further in the *past* than this value.

Bah.  Funnily enough I got this one right in the comment for
CreateDecodingContext.

Thanks for reading through the commit.

-- 
Álvaro Herrera                http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services



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