Re: [HACKERS] Implementing RESET CONNECTION ... - Mailing list pgsql-patches

From Christopher Kings-Lynne
Subject Re: [HACKERS] Implementing RESET CONNECTION ...
Date
Msg-id 42A278DF.5050709@familyhealth.com.au
Whole thread Raw
In response to Re: [HACKERS] Implementing RESET CONNECTION ...  (Bruce Momjian <pgman@candle.pha.pa.us>)
Responses Re: [HACKERS] Implementing RESET CONNECTION ...  (Oliver Jowett <oliver@opencloud.com>)
List pgsql-patches
What would be absolutely ideal is a reset connection command, plus some
way of knowing via the protocol if it's needed or not.

Chris

Bruce Momjian wrote:
> What did we decide on RESET CONNECTION.  Do we want an SQL command or
> something only the protocol can do?
>
> ---------------------------------------------------------------------------
>
> Oliver Jowett wrote:
>
>>(cc'ing -hackers)
>>
>>Karel Zak wrote:
>>
>>
>>>I think command status is common and nice feedback for client. I think
>>>it's more simple change something in JDBC than change protocol that is
>>>shared between more tools.
>>
>>There is a bit of a queue of changes that would be nice to have but
>>require a protocol version change. If we're going to change the protocol
>>for any of those we might as well handle RESET CONNECTION cleanly too.
>>
>>
>>>We need some common way how detect on client what's happen on server --
>>>a way that doesn't mean change protocol always when we add some
>>>feature/command to backend. The command status is possible use for this.
>>
>>Command status only works if commands are directly executed. If you can
>>execute the command indirectly, e.g. via a PL, then you'll miss the
>>notification. Making RESET a top-level-only command isn't unreasonable,
>>but using command status won't work as a general approach for notifying
>>clients.
>>
>>We have a mechanism for GUC changes that uses a separate message
>>(ParameterStatus). Perhaps that should be generalized to report
>>different sorts of connection-related changes.
>>
>>-O
>>
>>---------------------------(end of broadcast)---------------------------
>>TIP 7: don't forget to increase your free space map settings
>>
>
>

pgsql-patches by date:

Previous
From: Bruce Momjian
Date:
Subject: Re: [HACKERS] WAL: O_DIRECT and multipage-writer (+ memory
Next
From: Michael Glaesemann
Date:
Subject: Re: (8.1) to_timestamp correction (epoch to timestamptz)