Re: Doing psql's lexing with flex

Tom Lane wrote:
> Imagine for example
>     \set foo '\c mydb'
>     blah :foo bar
> The existing code would interpret this as
>     blah \c mydb bar
> but my patch as it stands would behave very strangely --- the \c
> command would see bar as its argument and then 'mydb' would be
> regurgitated after HandleSlashCommand finishes.

Feel free (or encouraged) to change the old behavior.  (Of course, the
new behavior needs to adjustments, too.)  Generally, I think a variable
should just stand for a data value and should not result in a slash
command being generated.