Re: Open 7.3 items

Sean Chittenden wrote:
> Agreed, but there is something to be said for doing a sort of users
> per domain. This wouldn't be an issue, I don't think, if there was a
> split_before() and split_after() like functions.
>
> # SELECT split_before('user(at)domain(dot)com','@'), split_after('user(at)domain(dot)com', '@');
> ?column? | ?column?
> ----------+------------
> user | domain.com
>
> What would you guys say to submissions for a patch that would add the
> function listed above? Maybe just a function called get_user(text)
> and get_domain(text)? ::shrug:: Just some thoughts since there is
> validity to being able to parse/operate on this data efficiently. If
> those functions existed, then I think everyone would be able to have
> their pie as they want it. -sc
>

I already have a function in contrib/dblink, currently called
dblink_strtok(), which I was going to turn into a builtin function per
recent discussion (renamed of course). It would work for this but is
more general:

dblink_strtok(text inputstring, text delimiter, int posn) RETURNS text

Inputs
inputstring
any string you want to parse a token out of;
e.g. 'f=1&g=3&h=4'
delimiter
a single character to use as the delimiter;
e.g. '&' or '='
posn
the position of the token of interest, 0 based;
e.g. 1

Should it be called splitstr() (similar to substr())?

Joe