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* How to prompt for a value if a variable is not set
@ 2017-09-19 03:03 randy@strausses.net
0 siblings, 1 reply; 2+ messages in thread
From: randy@strausses.net @ 2017-09-19 03:03 UTC (permalink / raw)
To: pgsql-docs
The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/9.2/static/app-psql.html
Description:
I want to make a small script to show the primary key for a table and put
the name into a variable.
Called from another script, the tablename is set in a variable called
tablename. But if the variable is not set, I want the script to prompt for
it.
Is there a way to do this?
thx,
-r
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^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: How to prompt for a value if a variable is not set
@ 2017-09-20 15:07 David G. Johnston <david.g.johnston@gmail.com>
parent: randy@strausses.net
0 siblings, 0 replies; 2+ messages in thread
From: David G. Johnston @ 2017-09-20 15:07 UTC (permalink / raw)
To: randy@strausses.net <randy@strausses.net>; +Cc: pgsql-docs
On Monday, September 18, 2017, <randy@strausses.net> wrote:
>
> But if the variable is not set, I want the script to prompt for
> it.
In version 10 this should be doable, we introduced \if conditionals. You
might be able to hack up something via "\!" in 9.6 and earlier (haven't
tried it myself).
David J.
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