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/268#issuecomment-789409126,https://api.github.com/repos/simonw/datasette/issues/268,789409126,MDEyOklzc3VlQ29tbWVudDc4OTQwOTEyNg==,649467,2021-03-03T03:57:15Z,2021-03-03T03:58:40Z,NONE,"In FTS5, I think doing an FTS search is actually much easier than doing a join against the main table like datasette does now. In fact, FTS5 external content tables provide a transparent interface back to the original table or view.

Here's what I'm currently doing:
* build a view that joins whatever tables I want and rename the columns to non-joiny names (e.g, `chapter.name AS chapter_name` in the view where needed)
* Create an FTS5 table with `content=""viewname""`
* As described in the ""external content tables"" section (https://www.sqlite.org/fts5.html#external_content_tables), sql queries can be made directly to the FTS table, which behind the covers makes select calls to the content table when the content of the original columns are needed.
* In addition, you get ""rank"" and ""bm25()"" available to you when you select on the _fts table.

Unfortunately, datasette doesn't currently seem happy being coerced into doing a real query on an fts5 table.  This works:
```select col1, col2, col3 from table_fts where coll1=""value"" and table_fts match escape_fts(""search term"") order by rank```

But this doesn't work in the datasette SQL query interface:
```select col1, col2, col3 from table_fts where coll1=""value"" and table_fts match escape_fts(:search) order by rank```   (the ""search"" input text field doesn't show up)

For what datasette is doing right now, I think you could just use contentless fts5 tables (`content=""""`), since all you care about is the rowid since all you're doing a subselect to get the rowid anyway. In fts5, that's just a contentless table.

I guess if you want to follow this suggestion, you'd need a somewhat different code path for fts5.

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