On Thu, 2004-08-12 at 16:01, Devin Whalen wrote:
> > zcat cli_postDataInserts.sql.gz |
> > psql -d cli_post -U system --echo-queries -f - >trace.file 2>&1
>
> Just a few questions about your command. I tried it with one sql
> statement that I know doesn't work and the error went into the right
> file. However, I would like to know WHY it works...hope you don't mind
> shedding some light on it :). Specifically, the - >trace.file 2>&1
> part. I know...well actually think, that the > is redirecting the ouput to the trace.file. But what the hell is
2>&1doing??
> Also, the - ...it kinda just looks like a stray dash to me....although I know it must be doing something ;).
> Will this put all output? Or just the errors.
">" redirects standard output
"2>" redirects standard error
Your command did not redirect standard error, so the errors didn't get
to grep
The syntax for -f is "-f filename"; the filename "-" means standard
input. (Check the man page for psql!)
Oliver