Re: [HACKERS] Implementing RESET CONNECTION ...
Christopher Kings-Lynne <chriskl@familyhealth.com.au>
From: Christopher Kings-Lynne <chriskl@familyhealth.com.au>
To: Bruce Momjian <pgman@candle.pha.pa.us>
Cc: Oliver Jowett <oliver@opencloud.com>, Karel Zak <zakkr@zf.jcu.cz>, Tom Lane <tgl@sss.pgh.pa.us>, Kris Jurka <books@ejurka.com>, Hans-Jürgen Schönig <postgres@cybertec.at>, eg@cybertec.at, List pgsql-patches <pgsql-patches@postgresql.org>, pgsql-hackers@postgresql.org
Date: 2005-06-05T04:00:31Z
Lists: pgsql-hackers
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 >> > >