Add Install Postgres With uuid-ossp Using asdf as a postgres til

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
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-_1119 TILs and counting..._
+_1120 TILs and counting..._
 
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@@ -572,6 +572,7 @@ _1119 TILs and counting..._
 - [Getting A Slice Of An Array](postgres/getting-a-slice-of-an-array.md)
 - [Group By The Result Of A Function Call](postgres/group-by-the-result-of-a-function-call.md)
 - [Insert Just The Defaults](postgres/insert-just-the-defaults.md)
+- [Install Postgres With uuid-ossp Using asdf](postgres/install-postgres-with-uuid-ossp-using-asdf.md)
 - [Integers In Postgres](postgres/integers-in-postgres.md)
 - [Intervals Of Time By Week](postgres/intervals-of-time-by-week.md)
 - [Is It Null Or Not Null?](postgres/is-it-null-or-not-null.md)

postgres/install-postgres-with-uuid-ossp-using-asdf.md

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+# Install Postgres With uuid-ossp Using asdf
+
+The `uuid-ossp` extension is part of `postgres-contrib` and is often included
+with installs of PostgreSQL. By default, when installing PostgreSQL with
+[`asdf`](https://asdf-vm.com/#/) using the
+[`asdf-postgres`](https://github.com/smashedtoatoms/asdf-postgres) plugin, the
+`uuid-ossp` extension is not included.
+
+To include `uuid-ossp` when installing Postgres with `asdf`, you'll need to
+include _extra config options_.
+
+For instance, to install Postgres 9.6.21 with `uuid-ossp` included:
+
+```bash
+$ POSTGRES_EXTRA_CONFIGURE_OPTIONS="--with-uuid=e2fs" asdf install postgres 9.6.21
+```
+
+There are some resources that recommend using `--with-uuid=ossp`, but that
+appears to require a prerequisite install of a separate package, so I prefer
+the `e2fs` option.
+
+[source](https://github.com/smashedtoatoms/asdf-postgres/issues/4#issuecomment-350592132)