Обсуждение: Why no CREATE TEMP MATERIALIZED VIEW ?
Hello,
Out of curiosity, since there's CREATE TEMP VIEW, any particular reason there's no CREATE TEMP MATERIALIZED VIEW?
Seems like it could be similar to a temp table.
On Tue, Jul 16, 2019 at 9:29 AM Ivan Voras <ivoras@gmail.com> wrote:
Out of curiosity, since there's CREATE TEMP VIEW, any particular reason there's no CREATE TEMP MATERIALIZED VIEW?Seems like it could be similar to a temp table.
Probably a lack (absence) of use cases resulted in people deciding (or defaulting) to not spend any effort in that area. Incremental maintenance and refresh seem considerably less useful when only the current session can see the table. Temp views and temp tables seem to provide sufficient options in the session lifetime space.
David J.
On 7/16/19 11:56 AM, David G. Johnston wrote:
How different is a "temp materialized view" from a regular view?
On Tue, Jul 16, 2019 at 9:29 AM Ivan Voras <ivoras@gmail.com> wrote:Out of curiosity, since there's CREATE TEMP VIEW, any particular reason there's no CREATE TEMP MATERIALIZED VIEW?Seems like it could be similar to a temp table.Probably a lack (absence) of use cases resulted in people deciding (or defaulting) to not spend any effort in that area. Incremental maintenance and refresh seem considerably less useful when only the current session can see the table. Temp views and temp tables seem to provide sufficient options in the session lifetime space.
How different is a "temp materialized view" from a regular view?
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> How different is a "temp materialized view" from a regular view?
If it existed, it would be useful for cases when you need to reference that view in multiple queries in the same session. I've gotten around this by just using temp tables.
On 2019-Jul-16, Ivan Voras wrote: > Hello, > > Out of curiosity, since there's CREATE TEMP VIEW, any particular reason > there's no CREATE TEMP MATERIALIZED VIEW? Because it hasn't been implemented. There is a patch, but it's not done. See this thread: https://postgr.es/m/CAKLmikNoQR4ZNg_wt=-hU-uUxV2cXVdveeRsMFjr2SAopVxDxw@mail.gmail.com -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services