Re: Improving RLS qual pushdown
От | Robert Haas |
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Тема | Re: Improving RLS qual pushdown |
Дата | |
Msg-id | CA+Tgmob5gxKT0sEqydP7gu4vebhdPpx254HixJMTej=n84K3DA@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: Improving RLS qual pushdown (Dean Rasheed <dean.a.rasheed@gmail.com>) |
Ответы |
Re: Improving RLS qual pushdown
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Список | pgsql-hackers |
On Wed, Jan 14, 2015 at 9:22 AM, Dean Rasheed <dean.a.rasheed@gmail.com> wrote: > On 14 January 2015 at 13:29, Robert Haas <robertmhaas@gmail.com> wrote: >> One thing they could still leak is the number of times they got >> called, and thus possibly the number of unseen rows. Now if the >> expressions get constant-folded away that won't be an issue, but a >> clever user can probably avoid that. > > Right now, EXPLAIN ANALYSE can be used to tell you the number of > unseen rows. Is that something that people are concerned about, and > are there any plans to change it? Interesting question. I don't know. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
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