html_url,issue_url,id,node_id,user,user_label,created_at,updated_at,author_association,body,reactions,issue,issue_label,performed_via_github_app
https://github.com/simonw/datasette/issues/448#issuecomment-969578466,https://api.github.com/repos/simonw/datasette/issues/448,969578466,IC_kwDOBm6k_c45ypfi,9599,simonw,2021-11-16T01:08:29Z,2021-11-16T01:08:29Z,OWNER,Actually with the cache warmed up it looks like the facet query is taking 150ms which is good enough.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",440222719,_facet_array should work against views,
https://github.com/simonw/datasette/issues/448#issuecomment-969582098,https://api.github.com/repos/simonw/datasette/issues/448,969582098,IC_kwDOBm6k_c45yqYS,9599,simonw,2021-11-16T01:10:28Z,2021-11-16T01:10:28Z,OWNER,"Also note that this demo data is using a SQL view to create the JSON arrays - the view is defined as such:

```sql
CREATE VIEW ads_with_targets as
select
  ads.*,
  json_group_array(targets.name) as target_names
from
  ads
  join ad_targets on ad_targets.ad_id = ads.id
  join targets on ad_targets.target_id = targets.id
group by
  ad_targets.ad_id;
```
So running JSON faceting on top of that view is a pretty big ask!","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",440222719,_facet_array should work against views,
https://github.com/simonw/datasette/issues/448#issuecomment-969572281,https://api.github.com/repos/simonw/datasette/issues/448,969572281,IC_kwDOBm6k_c45yn-5,9599,simonw,2021-11-16T01:05:11Z,2021-11-16T01:05:11Z,OWNER,"I tried this and it seems to work correctly:
```python
        for source_and_config in self.get_configs():
            config = source_and_config[""config""]
            source = source_and_config[""source""]
            column = config.get(""column"") or config[""simple""]
            facet_sql = """"""
                with inner as ({sql}),
                deduped_array_items as (
                    select
                        distinct j.value,
                        inner.*
                    from
                        json_each([inner].{col}) j
                        join inner
                )
                select
                    value as value,
                    count(*) as count
                from
                    deduped_array_items
                group by
                    value
                order by
                    count(*) desc limit {limit}
            """""".format(
                col=escape_sqlite(column), sql=self.sql, limit=facet_size + 1
            )
```
The queries are _very_ slow though - I had to bump up to 2s time limit even against only a view returning 3,499 rows.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",440222719,_facet_array should work against views,
https://github.com/simonw/datasette/issues/448#issuecomment-969557972,https://api.github.com/repos/simonw/datasette/issues/448,969557972,IC_kwDOBm6k_c45ykfU,9599,simonw,2021-11-16T00:56:58Z,2021-11-16T00:56:58Z,OWNER,It uses a CTE which were introduced in SQLite 3.8 - and AWS Lambda Python 3.9 still provides 3.7 - but I've checked and I can use `pysqlite3-binary` to work around that there so I'm OK relying on CTEs for this.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",440222719,_facet_array should work against views,
https://github.com/simonw/datasette/issues/448#issuecomment-969621662,https://api.github.com/repos/simonw/datasette/issues/448,969621662,IC_kwDOBm6k_c45y0Ce,9599,simonw,2021-11-16T01:32:04Z,2021-11-16T01:32:04Z,OWNER,"Tests are failing and I think it's because the facets come back in different orders, need a tie-breaker. https://github.com/simonw/datasette/runs/4219325197?check_suite_focus=true","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",440222719,_facet_array should work against views,
https://github.com/simonw/datasette/issues/448#issuecomment-969557008,https://api.github.com/repos/simonw/datasette/issues/448,969557008,IC_kwDOBm6k_c45ykQQ,9599,simonw,2021-11-16T00:56:09Z,2021-11-16T00:59:59Z,OWNER,"This looks like it might work:
```sql
with inner as (
  select
    *
  from
    ads_with_targets
  where
    :p0 in (
      select
        value
      from
        json_each([ads_with_targets].[target_names])
    )
),
deduped_array_items as (
  select
    distinct j.value,
    inner.*
  from
    json_each([inner].[target_names]) j
    join inner
)
select
  value,
  count(*)
from
  deduped_array_items
group by
  value
order by
  count(*) desc
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",440222719,_facet_array should work against views,