Re: Sending errors from psql to error file

On Thu, 2004-08-12 at 11:09, Oliver Elphick wrote:
> 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>&1 doing??
> > 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

Thanks for you explanations. They are a big help. Now that I
understand it better I can modify it to suit my needs. I really only
want the errors because if I keep track of all the inserts then the file
will be too big. So I just have to use 2>, or rather 2>> so I can
append to the file.

The syntax for -f is "-f filename"; the filename "-" means standard
> input. (Check the man page for psql!)

I swear I read it like 15 times and I guess I just scanned over that part every time!! :)

Later

--
Devin Whalen
Programmer
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