| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Jeff Davis <pgsql(at)j-davis(dot)com> |
| Cc: | Erik Rijkers <er(at)xs4all(dot)nl>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Range Types: << >> -|- ops vs empty range |
| Date: | 2011-02-11 17:36:09 |
| Message-ID: | AANLkTim+4LwmGLRxncSxXZ0hSihY4BQLO24kOhpMnM1H@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Fri, Feb 11, 2011 at 12:26 PM, Jeff Davis <pgsql(at)j-davis(dot)com> wrote:
> On Fri, 2011-02-11 at 12:03 -0500, Robert Haas wrote:
>> For what it's worth, my completely uninformed opinion is that
>> comparison operators shouldn't error out. I haven't read the patch so
>> I'm not sure what those operators are defined to do, though.
>
> ">>" means "strictly right of"
> "<<" means "strictly left of"
> "-|-" means "adjacent" (touching but not overlapping)
>
> I'm open to suggestion about how those behave with empty ranges.
Hmm, so an empty range is a range that includes nothing at all, right?
Not "everything in the world"?
Are we sure we even want to have that concept?
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Alex Hunsaker | 2011-02-11 17:44:56 | Re: Careful PL/Perl Release Not Required |
| Previous Message | Tom Lane | 2011-02-11 17:35:34 | Re: ALTER EXTENSION UPGRADE, v3 |