From: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
---|---|
To: | Andreas Karlsson <andreas(at)proxel(dot)se> |
Cc: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: generated columns |
Date: | 2017-09-13 08:22:04 |
Message-ID: | CANP8+jJhMg4uZmhVDtRY5wUOxv--6HdNMj=PicAEvbbGK55xNA@mail.gmail.com |
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Lists: | pgsql-hackers |
On 13 September 2017 at 09:09, Andreas Karlsson <andreas(at)proxel(dot)se> wrote:
> On 09/13/2017 04:04 AM, Simon Riggs wrote:
>>
>> On 31 August 2017 at 05:16, Peter Eisentraut
>> <peter(dot)eisentraut(at)2ndquadrant(dot)com> wrote:
>>>
>>> - index support (and related constraint support)
>>
>>
>> Presumably you can't index a VIRTUAL column. Or at least I don't think
>> its worth spending time trying to make it work.
>
>
> I think end users would be surprised if one can index STORED columns and
> expressions but not VIRTUAL columns. So unless it is a huge project I would
> say it is worth it.
It must be stored in the index certainly. I guess virtual is similar
to expression indexes then.
--
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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