Re: A thought on Index Organized Tables
От | Gokulakannan Somasundaram |
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Тема | Re: A thought on Index Organized Tables |
Дата | |
Msg-id | 9362e74e1002260036m7f0795bfh9bea5839f9187905@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: A thought on Index Organized Tables (Tom Lane <tgl@sss.pgh.pa.us>) |
Ответы |
Re: A thought on Index Organized Tables
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Список | pgsql-hackers |
<div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt0pt 0.8ex; padding-left: 1ex;"> To be a bit more concrete: the typical sort of failure that you could<br /> get from brokenbtree operators is failure of transitivity, that is<br /> the comparators report A < B and B < C for some A,B, C, but do not say<br /> that A < C when those two values are compared directly. I don't see any<br /> convenientway to detect that as a byproduct of normal index operations,<br /> because you wouldn't typically have a reasonto make all three<br /> comparisons in close proximity. Indeed, the searching and sorting<br /> algorithms do theirbest to avoid making "redundant" comparisons of that<br /> kind.<br /></blockquote></div><br />This is interesting Tom,but i am unable to understand, why it won't affect the current indexes. While insertion it might get inserted in a blockand offset, and while searching it might either return no results / show a wrong place. Because ordering is requiredfor searching also right? I definitely feel, i am missing something here.<br /><br />Gokul.<br />
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