Re: Disabling an index temporarily

On 11 December 2015 at 22:03, Joshua D. Drake <jd@commandprompt.com> wrote:
> On 12/11/2015 06:25 PM, Tatsuo Ishii wrote:
>
>> What about inventing a new SET command something like:
>>
>> SET disabled_index to <index-name>
>>
>> This adds <index-name> to "disabled index list". The disabled index
>> list let the planner to disregard the indexes in the list.
>>
>> SET enabled_index to <index-name>
>>
>> This removes <index-name> from the disabled index list.
>>
>> SHOW disabled_index
>>
>> This shows the content of the disabled index list.
>
>
> Wouldn't something like:
>
> ALTER INDEX foo SET DISABLED;
>
> See more in line with our grammar?
>
> I assume the index is only disabled as far as the planner is concerned and
> all updates/inserts/deletes will still actually update the index
> appropriately?
>

BTW, you can do that today with

UPDATE pg_index SET indisvalid = falseWHERE indexrelid = 'indexname'::regclass;

--
Jaime Casanova                      www.2ndQuadrant.com
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