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Comments (6)

Fleapse avatar Fleapse commented on September 22, 2024 
qs = model.objects.filter(
            timestamp__gte=start, sku=self.kwargs.get("sku")
        ).values(
            "sku",
            "marketplace",
        ).annotate(
            t=Func(
                F("timestamp"),
                RawSQL("INTERVAL 1 hour", []),
                function="toStartOfInterval",
                output_field=DateTimeField()
            ),
            price=Func(F("price_u"), function="any"),
            sale_price=Func(F("sale_price_u"), function="any"),
            c=Count("sku")
        ).values(
            "sku",
            "marketplace",
            "t",
            "price",
            "sale_price"
        )
SELECT
	"prices"."sku",
	"prices"."marketplace",
	toStartOfInterval("prices"."timestamp", (INTERVAL 1 hour)) AS "t",
	any("prices"."priceU") AS "price",
	any("prices"."salePriceU") AS "sale_price"
FROM "prices"
WHERE ("prices"."sku" = 126129665 AND "prices"."timestamp" >= 2023-08-29 16:21:51+00:00)
GROUP BY "prices"."sku", "prices"."marketplace", toStartOfInterval("prices"."timestamp", (INTERVAL 1 hour)), any("prices"."priceU"), any("prices"."salePriceU")

and here the annotation functions fall into GROUP BY

from django-clickhouse-backend.

Fleapse avatar Fleapse commented on September 22, 2024 
qs = model.objects.filter(
            timestamp__gte=start, sku=self.kwargs.get("sku")
        ).values(
            "sku",
            "marketplace",
        ).annotate(
            t=Func(
                F("timestamp"),
                RawSQL("INTERVAL 1 hour", []),
                function="toStartOfInterval",
                output_field=DateTimeField()
            ),
            price=Func(F("price_u"), function="any"),
            sale_price=Func(F("sale_price_u"), function="any"),
        ).values(
            "sku",
            "marketplace",
            "t",
            "price",
            "sale_price"
        )
SELECT "prices"."sku", "prices"."marketplace", toStartOfInterval("prices"."timestamp", (INTERVAL 1 hour)) AS "t", any("prices"."priceU") AS "price", any("prices"."salePriceU") AS "sale_price" FROM "prices" WHERE ("prices"."sku" = 126129665 AND "prices"."timestamp" >= 2023-08-29 16:27:52+00:00)

without Count - there is no Group by, but it must be

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Fleapse avatar Fleapse commented on September 22, 2024

because you have a new project - it’s normal that you haven’t implemented many sql methods, but then you need to ensure that Func and F work well so that you can deal with this :)
anyway thanks for this backend, it's a great job

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jayvynl avatar jayvynl commented on September 22, 2024

@Fleapse Try this:

qs = model.objects.filter(timestamp__gte=start, sku=self.kwargs.get("sku")).values("sku", "marketplace").annotate(c=Count("sku")).order_by()

Order of values, annotate and order_by do matter

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jayvynl avatar jayvynl commented on September 22, 2024

You can try any sql functions from django library, most of them should work, if any of them don't work, don't hesitate to report the bug.

I also have implemented some funtions in clickhouse_backend.models.functions module. But only the fuctions I used in my project. If you think some functions are important, any PR or feature request is welcomed.

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Fleapse avatar Fleapse commented on September 22, 2024

I double-checked, and the problem is really in the order of calling the methods, and it also works in the pgsql backend, so I’m closing the issue.
It still seems to me that some of the points above work strangely, I’ll double-check everything with how it works with older backends, and if something doesn’t work well, I’ll open another issue
The by group works very strangely in Django.
Thanks for answers!

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