| From: | Grzegorz Jaśkiewicz <gryzman(at)gmail(dot)com> |
|---|---|
| To: | cultural_sublimation(at)yahoo(dot)com |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Common table expressions and threaded comments |
| Date: | 2009-04-17 12:53:35 |
| Message-ID: | 2f4958ff0904170553o554a8059j370132db83701ffa@mail.gmail.com |
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| Thread: | |
| Lists: | pgsql-general |
On Fri, Apr 17, 2009 at 1:40 PM, Cultural Sublimation
<cultural_sublimation(at)yahoo(dot)com> wrote:
>
> Greetings,
>
> I need to implement the classical problem of threaded comments in a Postgresql
> database. I know that the upcoming 8.4 release includes Common Table
> Expressions, so I have to ask: is this feature the mother-of-all-solutions
> to the threaded comments problem, or is it still worth investigating ltree?
>
> Also, lots of people mention Joe Celko's book on this subject. Is it still
> a valid resource, or do CTE's make it obsolete?
Depending on what you actually need, but yes - CTE is the solution,
depending obviously on your schema design...
I think David (Fetter) had some examples in his slides on how to solve
common problems like that in a query.
--
GJ
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