Re: psql and named pipes

Aidan Van Dyk wrote:

> I've had to use:
> while (true); do cat pipe; done | psql
>
> The trick is that pipes "EOF"s everytime the cleint closes it. (Not
> strictly true, but it appears that way to basic read()ers).

Ah! Yeah, I knew that and forgot :-) It's easier than that actually --
you just need to keep the pipe open in another process. So I can do
this: first open a terminal with

$ psql -f foo

And then, in another terminal,

$ cat > foo &
[1] 29155

[1]+ Stopped cat >foo
$ echo "begin;" > foo
$ echo "create table a (a int);" > foo
$ echo "insert into a values (1);" > foo
$ echo "insert into a values (2);" > foo
$ echo "insert into a values (3);" > foo
$ echo "commit;" > foo
$ echo "select * from a;" > foo
$ kill %1
-bash: echo: write error: Appel système interrompu
[1]+ Complété cat >foo

And while this is going on, the other terminal shows the output being
produced by psql.

Thanks for the reminder :-)

--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.