Intro to PostreSQL extensions

Functions for Manipulating Data in PostgreSQL

Brian Piccolo

Sr. Director, Digital Strategy

Intro to PostgreSQL extensions

Commonly used extensions

PostGIS
PostPic
fuzzystrmatch
pg_trgm

Querying extension meta data

Available Extensions

SELECT name
FROM pg_available_extensions;

+--------------------+
| name               |
|--------------------|
| dblink             | 
| pg_stat_statements | 
+--------------------+

Installed Extensions

SELECT extname 
FROM pg_extension;

+---------+
| name    |
|---------|
| plpgsql |
+---------+

--Enable the fuzzystrmatch extension
CREATE EXTENSION IF NOT EXISTS fuzzystrmatch;
--Confirm that fuzzstrmatch has been enabled
SELECT extname FROM pg_extension;

+---------------+
| name          |
|---------------|
| plpgsql       |
| fuzzystrmatch |
+---------------+

Using fuzzystrmatch or fuzzy searching

SELECT levenshtein('GUMBO', 'GAMBOL');

+-------------+
| levenshtein |
|-------------|
|           2 |
+-------------+

Compare two strings with pg_trgm

SELECT similarity('GUMBO', 'GAMBOL');

+------------+
| similarity |
|------------|
| 0.18181818 |
+------------+

Let's practice!

Functions for Manipulating Data in PostgreSQL