Re: How to watch for schema changes

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От Adrian Klaver
Тема Re: How to watch for schema changes
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Msg-id 46a41f36-2799-a3ac-867b-d0f6195fd6bd@aklaver.com
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Ответ на Re: How to watch for schema changes  (Igor Korot <ikorot01@gmail.com>)
Ответы Re: How to watch for schema changes  (Igor Korot <ikorot01@gmail.com>)
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On 12/3/18 3:00 PM, Igor Korot wrote:
> Hi, Adrian,
> 
> On Mon, Dec 3, 2018 at 4:10 PM Adrian Klaver <adrian.klaver@aklaver.com> wrote:
>>
>> On 12/3/18 1:53 PM, Igor Korot wrote:
>>> Hi, Adrian,
>>
>>>> Why? Just create the trigger once in a script. Event triggers are an
>>>> attribute of the database and stay with it until they are dropped. If
>>>> you want to turn then on and off use the ALTER  EVENT TRIGGER
>>>> ENABLE/DISABLE. If you insist on recreating them on each connection then:
>>>>
>>>> https://www.postgresql.org/docs/10/sql-dropeventtrigger.html
>>>> DROP EVENT TRIGGER [ IF EXISTS ] name [ CASCADE | RESTRICT ]
>>>> CREATE EVENT TRIGGER ...
>>>
>>> I was hoping to create a software which will be just "install-and-use".
>>> No additional script running or database changes is required.
>>
>> After I hit reply my subconscious kicked in and pointed out something:)
>>
>> If there are no database changes why do you need to track schema changes?
> 
> That was a bad word selection. ;-)
> 
> What I mean to say was "no schema changes/server changes that comes
> independently
> of the program install". Or something to that extent.

Which circles back around to the same question:

If there are to be no schema changes after the install why track them on 
subsequent connections?

Or maybe an explanation of what you are trying to achieve would make 
things clearer?



> 
> Sorry, ESL person here.
> 
> Thank you.
> 
>>
>>>
>>> But I will probably create it on every connection and delete on the
>>> disconnect (see above).
>>>
>>
>> --
>> Adrian Klaver
>> adrian.klaver@aklaver.com
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com


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