--On Donnerstag, April 03, 2008 03:13:47 +0100 Gregory Stark
<stark@enterprisedb.com> wrote:
> I think you're crazy to think shells are more likely to have conflicts.
> Shells require a whole token match, not just the first letter.
>
> In other words, any alias *starting with* the letters c, d, e, f, g, h, i,
> o, s, w, z would be a conflict. Just for maximum confusion the list of
> letters which cause conflicts when capitalized would be entirely
> different.
>
> Picture a newbie typoing on their \old alias and trying to figure out
> where all their data is going... Hopefully they weren't too attached to
> whatever was in their "ldd" file yesterday.
Of course, the patch doesn't work this way. Only complete tokens delivered
by the parser are substituted, illustrated here with your example:
#= \alias old SELECT version();
#= \old
version
---------------------------------------------------------------------------------------------------
PostgreSQL 8.4devel on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC)
4.2.3 (Debian 4.2.3-2)
(1 row)
#= \o foo
#= \old
#=
zsh: suspended psql
% cat foo
version
---------------------------------------------------------------------------------------------------
PostgreSQL 8.4devel on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC)
4.2.3 (Debian 4.2.3-2)
(1 row)
--
Thanks
Bernd
