Re: 15beta1 tab completion of extension versions

On Sun, Jul 03, 2022 at 02:00:59PM -0400, Tom Lane wrote:
> I wrote:
> > Noah Misch <noah@leadboat.com> writes:
> >> "ALTER EXTENSION hstore UPDATE;" is a valid command (updates to the
> >> control file default version).  Hence, I think the v14 behavior was better.
> 
> > Hmm ... good point, let me think about that.
> 
> After consideration, my preferred solution is just this:
> 
> diff --git a/src/bin/psql/tab-complete.c b/src/bin/psql/tab-complete.c
> index 463cac9fb0..c5cafe6f4b 100644
> --- a/src/bin/psql/tab-complete.c
> +++ b/src/bin/psql/tab-complete.c
> @@ -1927,7 +1927,7 @@ psql_completion(const char *text, int start, int end)
>  
>  	/* ALTER EXTENSION <name> */
>  	else if (Matches("ALTER", "EXTENSION", MatchAny))
> -		COMPLETE_WITH("ADD", "DROP", "UPDATE TO", "SET SCHEMA");
> +		COMPLETE_WITH("ADD", "DROP", "UPDATE", "SET SCHEMA");
>  
>  	/* ALTER EXTENSION <name> UPDATE */
>  	else if (Matches("ALTER", "EXTENSION", MatchAny, "UPDATE"))
> 
> This will require one extra <TAB> when what you want is to update to
> a specific version, but I doubt that that's going to bother anyone
> very much.  I don't want to try to resurrect the v14 behavior exactly
> because it's too much of a mess from a quoting standpoint.

Works for me, and I agree the patch implements that successfully.  "ALTER
EXTENSION x UPDATE;" is an infrequent command, and "ALTER EXTENSION x UPDATE
TO ..." is even less frequent.  It's not worth much special effort to shave
<TAB> steps.