Re: Server name in psql prompt
От | Mark Morgan Lloyd |
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Тема | Re: Server name in psql prompt |
Дата | |
Msg-id | hi7rmc$rk9$1@pye-srv-01.telemetry.co.uk обсуждение исходный текст |
Ответ на | Re: Server name in psql prompt (Adrian Klaver <adrian.klaver@gmail.com>) |
Ответы |
Re: Server name in psql prompt
(Mark Morgan Lloyd <markMLl.pgsql-general@telemetry.co.uk>)
|
Список | pgsql-general |
Adrian Klaver wrote: > In the case you describe the below might work: > http://www.postgresql.org/docs/8.4/interactive/app-psql.html > "Before starting up, psql attempts to read and execute commands from the > system-wide psqlrc file and the user's ~/.psqlrc file. (On Windows, the > user's startup file is named %APPDATA%\postgresql\psqlrc.conf.) See > PREFIX/share/psqlrc.sample for information on setting up the system-wide > file. It could be used to set up the client or the server to taste > (using the \set and SET commands). " Thanks Adrian, link noted. > Set up a system psqlrc. I have done this when working with multiple > versions/multiple database clusters of Postgres on one machine to keep > track. I've gone round a number of machines setting up a basic psqlrc file, and will mail the most obnox^H^H^H^H^H demanding users warning them of the issues. >> ii) Getting the prompt to display the actual hostname of the server, >> rather than what was put on the command line which might be an alias or >> dotted-quad address. > > > Same link as above. > %M > > The full host name (with domain name) of the database server, or > [local] if the connection is over a Unix domain socket, or > [local:/dir/name], if the Unix domain socket is not at the compiled in > default location. I've just checked that and if I do psql -h postgres where postgres is a DNS alias to postgres1 then the expansion of %M is "postgres" not "postgres1". >> iii) Getting the prompt to display some other identifier from the server >> to identify the disc set > > > Make either one of these different for each server. > > %:name: > > The value of the psql variable name. See the section Variables for > details. > > %[ ... %] OK but if I understand you (and the docs) correctly I'd still need to find a way to set the variable on the client rather than having something fetched from the server. I thought earlier that I could use finger as a hack for querying the server, i.e. I could put e.g. a disc set name in /home/postgres/.plan. However I then realised that I'd need %M to be expanded before %`, so that I could do something like \set PROMPT1 '`finger postgres@%M|filter`: %/%R%# ' where filter only returned the bit that was needed. I've not tried this due to the ordering issue. > Prompts can contain terminal control characters which, for example, > change the color, background, or style of the prompt text, or change the > title of the terminal window. In order for the line editing features of > Readline to work properly, these non-printing control characters must be > designated as invisible by surrounding them with %[ and %]. Multiple > pairs of these can occur within the prompt. For example: > > testdb=> \set PROMPT1 '%[%033[1;33;40m%]%n@%/%R%[%033[0m%]%# ' > > results in a boldfaced (1;) yellow-on-black (33;40) prompt on > VT100-compatible, color-capable terminals. Thanks, noted. -- Mark Morgan Lloyd markMLl .AT. telemetry.co .DOT. uk [Opinions above are the author's, not those of his employers or colleagues]
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