On 12 July 2018 at 02:24, Mathieu Fenniak wrote:
> I'm currently looking at a query that is generally selecting a bunch of
> simple columns from a table, and also performing some subqueries to
> aggregate related data, and then sorting by one of the simple columns and
> paginating the result.
>
>
Hi Hellmuth,
Thanks for the response and the new approach; a LATERAL JOIN is new to me.
Unfortunately it seems to have the same performance characteristics and
query plan. The aggregation in the lateral join still executes for every
row (eg. if my base query has 50 rows, I get "Aggregate
Hi
Try this way:
SELECT
tbl.field1, tbl.field2, tbl.field3, ...,
b.Thingy1Sum,
... repeat for multiply thingies ...
FROM
tbl
LATERAL JOIN (
SELECT anothertbl.UserId,SUM(Duration) as Thingy1Sum
FROM anothertbl
WHERE anothertbl.UserId = tbl.UserId AND anothertbl.ThingyId = 1
group by 1)
Hi pgsql-general!
I'm currently looking at a query that is generally selecting a bunch of
simple columns from a table, and also performing some subqueries to
aggregate related data, and then sorting by one of the simple columns and
paginating the result.
eg.
SELECT
tbl.field1, tbl.field2,
