Steps to install the pg_similarity extension into Postgres

The pg_similarity extension lets you run a variety of similarity functions, such as Jaro Winkler, in Postgres.

In your shell:

cd /usr/local/src

git clone https://github.com/eulerto/pg_similarity.git

cd pg_similarity

export USE_PGXS=1

make

make install

In Postgres:

create extension pg_similarity;

Test it out:

select jarowinkler('acme, inc', 'acme incorporated');

Output

	jarowinkler double precision
1	0.871895424836601