Re: pageinspect: Hash index support

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От Jesper Pedersen
Тема Re: pageinspect: Hash index support
Дата
Msg-id bee4df6a-79d2-f04e-7f2c-c31581c25a45@redhat.com
обсуждение исходный текст
Ответ на Re: pageinspect: Hash index support  (Jeff Janes <jeff.janes@gmail.com>)
Ответы Re: pageinspect: Hash index support  (Michael Paquier <michael.paquier@gmail.com>)
Список pgsql-hackers
On 09/20/2016 12:45 PM, Jeff Janes wrote:
> Is the 2nd "1" in this call needed?
>
> SELECT * FROM hash_page_stats(get_raw_page('mytab_index', 1), 1)
>
> As far as I can tell, that argument is only used to stuff into the output
> field "blkno", it is not used to instruct the interpretation of the raw
> page itself.  It doesn't seem worthwhile to have the parameter that only
> echos back to the user what the user already put in (twice).  The only
> existing funtions which take the blkno argument are those that don't use
> the get_raw_page style.
>
> Also, should we document what the single letter values mean in the
> hash_page_stats.type column?  It is not obvious that 'i' means bitmap, for
> example.
>

Adjusted in v4. Code/doc will need an update once the CHI patch goes in.

Best regards,
  Jesper


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