Re: [COMMITTERS] pgsql: Don't scan partitioned tables.
От | Simon Riggs |
---|---|
Тема | Re: [COMMITTERS] pgsql: Don't scan partitioned tables. |
Дата | |
Msg-id | CANP8+jL_tqe+Jr-_tCWyHp+-vvYCO4jnOkRVi0uB_1Nim7uEBQ@mail.gmail.com обсуждение исходный текст |
Ответ на | [COMMITTERS] pgsql: Don't scan partitioned tables. (Robert Haas <rhaas@postgresql.org>) |
Ответы |
Re: [COMMITTERS] pgsql: Don't scan partitioned tables.
|
Список | pgsql-committers |
On 21 March 2017 at 13:48, Robert Haas <rhaas@postgresql.org> wrote: > Don't scan partitioned tables. Sounds good. > Aside from the obvious advantage of avoiding some work at execution > time, this has two other advantages. First, it may improve the > planner's decision-making in some cases since the empty relation > might throw things off. I was surprised to see that an Append node still exists when there is only one child plan to be appended. I thought removing that was the whole point of the patch? > Second, it paves the way to getting rid of > the storage for partitioned tables altogether. I thought we already discussed that. Seems strange to mention something not very important that might happen in the future. We could save much more space by optimising FSM. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
В списке pgsql-committers по дате отправления: