I was reading through the Postgres documentation on materialized views and in one example they use the following:
SELECT word FROM words ORDER BY word <-> 'caterpiler' LIMIT 10;
I tried to run a similar query on my own database, but I get an error.
 ERROR: operator does not exist: character varying <-> unknown
I (probably) don't need to use the operator, but I'm just curious what it does.
- I am running the same version as the docs (9.3)
- I did try Googling the question, but Google just ignores the
<->even if you wrap it in quotes.