Add research notes about search

README.md

@@ -2,8 +2,8 @@
 
 To start your Phoenix server:
 
-  * Run `mix setup` to install and setup dependencies
-  * Start Phoenix endpoint with `mix phx.server` or inside IEx with `iex -S mix phx.server`
+- Run `mix setup` to install and setup dependencies
+- Start Phoenix endpoint with `mix phx.server` or inside IEx with `iex -S mix phx.server`
 
 Now you can visit [`localhost:4000`](http://localhost:4000) from your browser.
 
@@ -11,8 +11,19 @@ Ready to run in production? Please [check our deployment guides](https://hexdocs
 
 ## Learn more
 
-  * Official website: https://www.phoenixframework.org/
-  * Guides: https://hexdocs.pm/phoenix/overview.html
-  * Docs: https://hexdocs.pm/phoenix
-  * Forum: https://elixirforum.com/c/phoenix-forum
-  * Source: https://github.com/phoenixframework/phoenix
+- Official website: https://www.phoenixframework.org/
+- Guides: https://hexdocs.pm/phoenix/overview.html
+- Docs: https://hexdocs.pm/phoenix
+- Forum: https://elixirforum.com/c/phoenix-forum
+- Source: https://github.com/phoenixframework/phoenix
+
+## Dev Notes
+
+### Search
+
+- SQLite supports full-text search via the built-in FTS5 extension, which is enabled by default and loaded in the Elixir Driver.
+  The extension requires building a virtual table that holds the data to be searched. This seems to be akin to a materialized view.
+- To have fuzzy search, another extension needs to be loaded.
+  [Exqlite](https://github.com/elixir-sqlite/exqlite?tab=readme-ov-file) recommends using [ExSqlean](https://github.com/mindreframer/ex_sqlean),
+  which in turn uses [Sqlean](https://github.com/mindreframer/sqlean), but the extension is NOT part of the ExSQlean set.
+  Need to investigate with forking and PR.