Re: Rewrite, normal execution vs. EXPLAIN ANALYZE
| От | Robert Haas |
|---|---|
| Тема | Re: Rewrite, normal execution vs. EXPLAIN ANALYZE |
| Дата | |
| Msg-id | AANLkTinLQ5idfWAU5n7g==EerL0RdxPp7gbyN65zZ0xP@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: Rewrite, normal execution vs. EXPLAIN ANALYZE (Marko Tiikkaja <marko.tiikkaja@cs.helsinki.fi>) |
| Ответы |
Re: Rewrite, normal execution vs. EXPLAIN ANALYZE
|
| Список | pgsql-hackers |
On Fri, Jul 23, 2010 at 2:13 PM, Marko Tiikkaja <marko.tiikkaja@cs.helsinki.fi> wrote: > On 7/23/2010 8:52 PM, David Fetter wrote: >> >> On Thu, Jul 22, 2010 at 08:43:35PM +0300, Marko Tiikkaja wrote: >>> >>> Did I misunderstand the code? And if I didn't, why do we do this >>> differently? >> >> You mentioned in IRC that this was in aid of getting wCTEs going. How >> are these things connected? > > Currently, I'm trying to make wCTEs behave a bit like RULEs do. But if > every rewrite product takes a new snapshot, wCTEs will behave very > unpredictably. > > But because EXPLAIN ANALYZE does *not* take a new snapshot for every rewrite > product, I'm starting to think that maybe this isn't the behaviour we wanted > to begin with? Where should I be looking in the code for this? -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise Postgres Company
В списке pgsql-hackers по дате отправления: