Обсуждение: When "psql -l" is invoked from prompt and not completed, no other user can create a database..
Postgres Version 7.1 When "psql -l" is invoked from prompt, and a user lets it sit at the 'more' prompt, no other user can create a database. The "cannot access template..." error is thrown. Has this been corrected in later versions? --------------------------------- Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software
Adrian Calvin wrote: > Postgres Version 7.1 > > When "psql -l" is invoked from prompt, and a user lets it sit > at the 'more' prompt, no other user can create a database. The > "cannot access template..." error is thrown. Has this been > corrected in later versions? Sorry, I have trouble believing that. What version of PostgreSQL are you using. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073
Bruce Momjian <pgman@candle.pha.pa.us> writes:
> Adrian Calvin wrote:
>> When "psql -l" is invoked from prompt, and a user lets it sit
>> at the 'more' prompt, no other user can create a database. The
>> "cannot access template..." error is thrown. Has this been
>> corrected in later versions?
> Sorry, I have trouble believing that.
I don't. It's from the interlock that prevents copying a database that
contains active sessions.
regards, tom lane
Tom Lane wrote: > Bruce Momjian <pgman@candle.pha.pa.us> writes: > > Adrian Calvin wrote: > >> When "psql -l" is invoked from prompt, and a user lets it sit > >> at the 'more' prompt, no other user can create a database. The > >> "cannot access template..." error is thrown. Has this been > >> corrected in later versions? > > > Sorry, I have trouble believing that. > > I don't. It's from the interlock that prevents copying a database that > contains active sessions. I understand that, but why does psql still hold that lock while displaying the database names with more? I thought the database was shipped to the client, and the locks released. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073
Bruce Momjian <pgman@candle.pha.pa.us> writes:
> Tom Lane wrote:
>> I don't. It's from the interlock that prevents copying a database that
>> contains active sessions.
> I understand that, but why does psql still hold that lock while
> displaying the database names with more?
I don't think it closes the database connection until it's ready to
exit.
We could maybe fix -l to close the connection before outputting data,
but it doesn't seem like that really will make a lot of difference.
What of someone who's connected to template1 with a plain "psql
template1" session?
regards, tom lane
Tom Lane wrote: > Bruce Momjian <pgman@candle.pha.pa.us> writes: > > Tom Lane wrote: > >> I don't. It's from the interlock that prevents copying a database that > >> contains active sessions. > > > I understand that, but why does psql still hold that lock while > > displaying the database names with more? > > I don't think it closes the database connection until it's ready to > exit. > > We could maybe fix -l to close the connection before outputting data, > but it doesn't seem like that really will make a lot of difference. > What of someone who's connected to template1 with a plain "psql > template1" session? Oh, so it is their connection to template1 that is causing the lock, not the display of the -l data. Thanks, got it, and makes sense. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073