html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,issue,performed_via_github_app
https://github.com/simonw/datasette/issues/319#issuecomment-399139462,https://api.github.com/repos/simonw/datasette/issues/319,399139462,MDEyOklzc3VlQ29tbWVudDM5OTEzOTQ2Mg==,9599,2018-06-21T15:13:58Z,2018-06-21T15:13:58Z,OWNER,"Demo of fix: https://latest.datasette.io/fixtures-e14e080/searchable_tags

![2018-06-21 at 8 13 am](https://user-images.githubusercontent.com/9599/41728203-0b571e9a-752b-11e8-9702-9887e3ede5bc.png)
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",334149717,
https://github.com/simonw/datasette/issues/314#issuecomment-399156960,https://api.github.com/repos/simonw/datasette/issues/314,399156960,MDEyOklzc3VlQ29tbWVudDM5OTE1Njk2MA==,9599,2018-06-21T16:04:59Z,2018-06-21T16:04:59Z,OWNER,"Demo of fix: https://latest.datasette.io/fixtures-e14e080/simple_view

![2018-06-21 at 9 04 am](https://user-images.githubusercontent.com/9599/41731021-2be526aa-7532-11e8-9c3b-f787f918328e.png)
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",333096176,
https://github.com/simonw/datasette/issues/318#issuecomment-398973309,https://api.github.com/repos/simonw/datasette/issues/318,398973309,MDEyOklzc3VlQ29tbWVudDM5ODk3MzMwOQ==,9599,2018-06-21T04:35:12Z,2018-06-21T04:37:37Z,OWNER,"Demo of fix: the `on_earth` facet on https://latest.datasette.io/fixtures-cafd088/facetable?_facet=planet_int&_facet=on_earth&_facet=city_id
![2018-06-20 at 9 35 pm](https://user-images.githubusercontent.com/9599/41698208-ebb6b72a-74d1-11e8-9d85-de7600177f69.png)
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",334148669,
https://github.com/simonw/datasette/issues/309#issuecomment-399142274,https://api.github.com/repos/simonw/datasette/issues/309,399142274,MDEyOklzc3VlQ29tbWVudDM5OTE0MjI3NA==,9599,2018-06-21T15:22:02Z,2018-06-21T15:22:02Z,OWNER,Demo: https://latest.datasette.io/fixtures-e14e080/,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",331343824,
https://github.com/simonw/datasette/issues/319#issuecomment-399154550,https://api.github.com/repos/simonw/datasette/issues/319,399154550,MDEyOklzc3VlQ29tbWVudDM5OTE1NDU1MA==,9599,2018-06-21T15:58:15Z,2018-06-21T15:58:15Z,OWNER,Fixed here too now: https://registry.datasette.io/registry-c10707b/datasette_tags,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",334149717,
https://github.com/simonw/datasette/issues/317#issuecomment-399144688,https://api.github.com/repos/simonw/datasette/issues/317,399144688,MDEyOklzc3VlQ29tbWVudDM5OTE0NDY4OA==,9599,2018-06-21T15:29:06Z,2018-06-21T15:29:16Z,OWNER,"From https://docs.travis-ci.com/user/deployment/pypi/

> Note that if your PyPI password contains special characters you need to escape them before encrypting your password. Some people have [reported difficulties](https://github.com/travis-ci/dpl/issues/377) connecting to PyPI with passwords containing anything except alphanumeric characters.
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",333326107,
https://github.com/simonw/datasette/issues/309#issuecomment-399134680,https://api.github.com/repos/simonw/datasette/issues/309,399134680,MDEyOklzc3VlQ29tbWVudDM5OTEzNDY4MA==,9599,2018-06-21T14:59:57Z,2018-06-21T14:59:57Z,OWNER,I can use Sanic middleware for this: http://sanic.readthedocs.io/en/latest/sanic/middleware.html#responding-early,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",331343824,
https://github.com/simonw/datasette/issues/321#issuecomment-399171239,https://api.github.com/repos/simonw/datasette/issues/321,399171239,MDEyOklzc3VlQ29tbWVudDM5OTE3MTIzOQ==,9599,2018-06-21T16:51:08Z,2018-06-21T16:51:29Z,OWNER,"I may have misunderstood your problem here.

I understood that the problem is that when using the `""%"" || :text || ""%""` construct the first hit to that page (with an empty string for `:text`) results in a `where neighborhood like ""%%""` query which is slow because it matches every row in the database.

My fix was to add this to the where clause:

    where :text != '' and ...

Which means that when you first load the page the where fails to match any rows and you get no results (and hopefully instant loading times assuming SQLite is smart enough to optimize this away). That's why you don't see any rows returned on this page: https://latest.datasette.io/fixtures-cafd088?sql=select+neighborhood%2C+facet_cities.name%2C+state%0D%0Afrom+facetable%0D%0A++++join+facet_cities+on+facetable.city_id+%3D+facet_cities.id%0D%0Awhere+%3Atext+%21%3D+%22%22+and+neighborhood+like+%27%25%27+%7C%7C+%3Atext+%7C%7C+%27%25%27%0D%0Aorder+by+neighborhood%3B","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",334190959,
https://github.com/simonw/datasette/issues/321#issuecomment-398976488,https://api.github.com/repos/simonw/datasette/issues/321,398976488,MDEyOklzc3VlQ29tbWVudDM5ODk3NjQ4OA==,9599,2018-06-21T04:59:33Z,2018-06-21T06:11:02Z,OWNER,"I've added this to the unit tests and the documentation.

Docs: http://datasette.readthedocs.io/en/latest/sql_queries.html#canned-queries
Canned query demo: https://latest.datasette.io/fixtures/neighborhood_search?text=town

New unit test:

https://github.com/simonw/datasette/blob/3683a6b626b2e79f4dc9600d45853ca4ae8de11a/tests/test_api.py#L333-L344

https://github.com/simonw/datasette/blob/3683a6b626b2e79f4dc9600d45853ca4ae8de11a/tests/fixtures.py#L145-L153","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",334190959,
https://github.com/simonw/datasette/issues/259#issuecomment-399157944,https://api.github.com/repos/simonw/datasette/issues/259,399157944,MDEyOklzc3VlQ29tbWVudDM5OTE1Nzk0NA==,9599,2018-06-21T16:07:49Z,2018-06-21T16:07:49Z,OWNER,Thanks to #319 the test suite now includes a m2m table: https://latest.datasette.io/fixtures-e14e080/searchable_tags,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",322787470,
https://github.com/simonw/datasette/issues/317#issuecomment-399150285,https://api.github.com/repos/simonw/datasette/issues/317,399150285,MDEyOklzc3VlQ29tbWVudDM5OTE1MDI4NQ==,9599,2018-06-21T15:45:47Z,2018-06-21T15:45:47Z,OWNER,That fixed it! https://travis-ci.org/simonw/datasette/jobs/395078407 ran successfully and https://pypi.org/project/datasette/ now hosts Datasette 0.23.1 deployed via Travis.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",333326107,
https://github.com/simonw/datasette/issues/321#issuecomment-398973176,https://api.github.com/repos/simonw/datasette/issues/321,398973176,MDEyOklzc3VlQ29tbWVudDM5ODk3MzE3Ng==,9599,2018-06-21T04:34:11Z,2018-06-21T16:53:57Z,OWNER,"This is a little bit fiddly, but it's possible to do it using SQLite string concatenation. Here's an example:

```
select * from facetable
where neighborhood like ""%"" || :text || ""%"";
```

Try it here: https://latest.datasette.io/fixtures-35b6eb6?sql=select+*+from+facetable+where+neighborhood+like+%22%25%22+%7C%7C+%3Atext+%7C%7C+%22%25%22%3B&text=town

![2018-06-20 at 9 33 pm](https://user-images.githubusercontent.com/9599/41698185-a52143f2-74d1-11e8-8d16-32bfc4542104.png)
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",334190959,
https://github.com/simonw/datasette/issues/321#issuecomment-399126228,https://api.github.com/repos/simonw/datasette/issues/321,399126228,MDEyOklzc3VlQ29tbWVudDM5OTEyNjIyOA==,9599,2018-06-21T14:36:40Z,2018-06-21T14:36:53Z,OWNER,"This seems to fix that:
```
select neighborhood, facet_cities.name, state
from facetable
    join facet_cities on facetable.city_id = facet_cities.id
where :text != '' and neighborhood like '%' || :text || '%'
order by neighborhood;
```
Compare this (with empty string): https://latest.datasette.io/fixtures-cafd088?sql=select+neighborhood%2C+facet_cities.name%2C+state%0D%0Afrom+facetable%0D%0A++++join+facet_cities+on+facetable.city_id+%3D+facet_cities.id%0D%0Awhere+%3Atext+%21%3D+%22%22+and+neighborhood+like+%27%25%27+%7C%7C+%3Atext+%7C%7C+%27%25%27%0D%0Aorder+by+neighborhood%3B

To this: https://latest.datasette.io/fixtures-cafd088?sql=select+neighborhood%2C+facet_cities.name%2C+state%0D%0Afrom+facetable%0D%0A++++join+facet_cities+on+facetable.city_id+%3D+facet_cities.id%0D%0Awhere+%3Atext+%21%3D+%22%22+and+neighborhood+like+%27%25%27+%7C%7C+%3Atext+%7C%7C+%27%25%27%0D%0Aorder+by+neighborhood%3B&text=town","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",334190959,