Re: creating extension including dependencies

> 10 июля 2015 г., в 16:09, Heikki Linnakangas <hlinnaka(at)iki(dot)fi> написал(а):
>
> On 07/09/2015 07:05 PM, Petr Jelinek wrote:
>> On 2015-07-07 15:41, Andres Freund wrote:
>>> On 2015-07-07 22:36:29 +0900, Fujii Masao wrote:
>>>> On Mon, Jun 15, 2015 at 7:50 AM, Petr Jelinek <petr(at)2ndquadrant(dot)com> wrote:
>>>>> Hi,
>>>>>
>>>>> I am getting tired installing manually required extensions manually. I was
>>>>> wondering if we might want to add option to CREATE SEQUENCE that would allow
>>>>> automatic creation of the extensions required by the extension that is being
>>>>> installed by the user.
>>>>
>>>> I'm wondering how much helpful this feature is. Because, even if we can save
>>>> some steps for CREATE EXTENSION by using the feature, we still need to
>>>> manually find out, download and install all the extensions that the target
>>>> extension depends on. So isn't it better to implement the tool like yum, i.e.,
>>>> which performs all those steps almost automatically, rather than the proposed
>>>> feature? Maybe it's outside PostgreSQL core.
>>>
>>> That doesn't seem to make much sense to me. Something like yum can't
>>> install everything in all relevant databases. Sure, yum will be used to
>>> install dependencies between extensions on the filesystem level.
>>>
>>> At the minimum I'd like to see that CREATE EXTENSION foo; would install
>>> install extension 'bar' if foo dependended on 'bar' if CASCADE is
>>> specified. Right now we always error out saying that the dependency on
>>> 'bar' is not fullfilled - not particularly helpful.
>>
>> That's what the proposed patch does (with slightly different syntax but
>> syntax is something that can be changed easily).
>
> This seems quite reasonable, but I have to ask: How many extensions are there out there that depend on another extension? Off the top of my head, I can't think of any..

pg_stat_kcache depends on pg_stat_statements, for example.

>
> - Heikki
>
>
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