Re: Documentation of bt_page_items()'s ctid field

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От Jeff Janes
Тема Re: Documentation of bt_page_items()'s ctid field
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Msg-id CAMkU=1xJ+wzhtgptricULOLjLDLSmyWcX2vQsPbAjOasWzKfHA@mail.gmail.com
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Ответ на Re: Documentation of bt_page_items()'s ctid field  (Heikki Linnakangas <hlinnakangas@vmware.com>)
Ответы Re: Documentation of bt_page_items()'s ctid field  (Peter Geoghegan <pg@heroku.com>)
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On Tue, Dec 30, 2014 at 8:59 AM, Heikki Linnakangas <hlinnakangas@vmware.com> wrote:
On 12/30/2014 04:08 AM, Peter Geoghegan wrote:
Attached documentation patch describes the purpose of
bt_page_items()'s ctid field. This has come up enough times in
disaster recovery or testing scenarios that I feel it's worth drawing
particular attention to.

How much detail on the b-tree internals do we want to put in the pageinspect documentation? I can see that being useful, but should we also explain e.g. that the first item on each (non-rightmost) page is the high key?

How do I know if I am looking at a non-rightmost page?

Thanks,

Jeff

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