On Wed, 20 Mar 2024 at 21:01, Celia McInnis <celia.mcinnis@gmail.com> wrote:
> Correct. But the initial CREATE VIEW was done as a SELECT from the database, so if the create view was quick, I
thoughtthat the select from the view would be equally quick. Is this a faulty assumption?
It is. Create view does not run the query, select from the view does,
Create view is like compiling a function, it just checks, select from
the view is like running the function.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
s=> \timing
Timing is on.
s=> create temporary view tstview as select pg_sleep(1)::text;
CREATE VIEW
Time: 153.129 ms
s=> select * from tstview;
pg_sleep
----------
(1 row)
Time: 1009.195 ms (00:01.009)
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Francisco Olarte.
