| From: | "David E(dot) Wheeler" <david(at)kineticode(dot)com> |
|---|---|
| To: | justin <justin(at)emproshunts(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Greg Stark <stark(at)enterprisedb(dot)com>, Sam Mason <sam(at)samason(dot)me(dot)uk>, pgsql-general(at)postgresql(dot)org, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: [HACKERS] string_to_array with empty input |
| Date: | 2009-04-01 17:23:18 |
| Message-ID: | B30A76B4-3912-4125-BADD-B2ABA1ABEC5C@kineticode.com |
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| Thread: | |
| Lists: | pgsql-general pgsql-hackers |
On Apr 1, 2009, at 10:05 AM, justin wrote:
> string_to_array('',',')::INT[] works as proposed
>
> But
> string_to_array(',,,', ',' )::INT[] Fails
> or
> string_to_array('1,2,,4', ',' )::INT[] Fails .
>
>
> I'm trying to understand the difference between a empty string to a
> string with many blank entries between the delimiter.
> Consider ',,,,,,' = '' once the delimiter is removed . Yet
> Seven zero length entries were passed. How is that going to be
> handled????
Right, it's making a special case of '', which does seem rather
inconsistent to me.
Best,
David
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