Re: \if, \elseif, \else, \endif (was Re: PSQL commands: \quit_if, \quit_unless)

On Thu, Feb 9, 2017 at 4:43 PM, Erik Rijkers <er(at)xs4all(dot)nl> wrote:

> On 2017-02-09 22:15, Tom Lane wrote:
>
>> Corey Huinker <corey(dot)huinker(at)gmail(dot)com> writes:
>>
>
> The feature now ( at patch v10) lets you break off with Ctrl-C anywhere.
> I like it now much more.
>
> The main thing I still dislike somewhat about the patch is the verbose
> output. To be honest I would prefer to just remove /all/ the interactive
> output.
>
> I would vote to just make it remain silent if there is no error. (and if
> there is an error, issue a message and exit)
>
> thanks,
>
> Erik Rijkers
>

Changes in this patch:
- invalid boolean expression on \if or \elif is treated as if the script
had a bad \command, so it either stops the script (ON_ERROR_STOP, script
mode), or just gives the ParseVariableBool error and continues.

- All interactive "barks" removed except for
"command ignored. use \endif or Ctrl-C to exit current branch" when the
user types a non-branching \command in a false branch
"query ignored. use \endif or Ctrl-C to exit current branch" when the
user types a non-branching \command in a false branch
"\if: escaped" when a user does press Ctrl-C and they escape a branch.

- remaining error messages are tersed:
\elif: cannot occur after \else
\elif: no matching \if
\else: cannot occur after \else
\else: no matching \if
\endif: no matching \if
found EOF before closing \endif(s)