https://github.com/pramsey/pgsql-postal

PostgreSQL binding for libpostal
https://github.com/pramsey/pgsql-postal

Last synced: 17 days ago
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PostgreSQL binding for libpostal

• Host: GitHub
• URL: https://github.com/pramsey/pgsql-postal
• Owner: pramsey
• License: mit
• Created: 2016-03-12T18:01:58.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2021-01-27T18:55:37.000Z (almost 4 years ago)
• Last Synced: 2024-08-01T00:37:55.865Z (3 months ago)
• Language: C
• Size: 7.81 KB
• Stars: 135
• Watchers: 15
• Forks: 20
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
# PostgreSQL  Postal Address Normalizer

## Motivation

[Libpostal](https://github.com/openvenues/libpostal) is a C library for parsing/normalizing street addresses around the world. Having that functionality directly in PostgreSQL could potentially be useful.

This extension is for that.

## Usage Notes

* PostgreSQL 9.4 and higher is required because of the JSONB support. Could reduce that by using ordinary JSON as a return type instead.

* [libpostal](https://github.com/openvenues/libpostal) takes quite a lot of memory when intialized, and has a noticeable start-up time. When you first run `postal_normalize` or `postal_parse` there will be a delay while the library data first loads. 

* Backends with `libpostal` active will be quite large in terms of memory usage (about 1Gb on my computer) so you probably want to take care about spawning too many of them at once.

## Examples

    =# SELECT unnest(postal_normalize('412 first ave, victoria, bc'));

    

                      unnest                  

    ------------------------------------------

     412 1st avenue victoria british columbia

     412 1st avenue victoria bc

    (2 rows)

    =# SELECT postal_parse('412 first ave, victoria, bc');

    

                                      postal_parse                                   

    ---------------------------------------------------------------------------------

     {"city": "victoria", "road": "first ave", "state": "bc", "house_number": "412"}

    (1 row)

## Functions

* `postal_normalize(address TEXT)` returns `TEXT[]`

* `postal_parse(address TEXT)` returns `JSONB`

## Installation

### UNIX

If you have PostgreSQL devel packages and CURL devel packages installed, you should have `pg_config` on your path. Confirm by running `which pg_config`.

Edit the paths to `POSTAL_INCLUDE` and `POSTAL_LIBS` in the `Makefile` to refer to your `libpostal` install location, and then run:

    make

    make install

Then in your database `CREATE EXTENSION postal`.

### Windows

Sorry, no story here yet.

## To Do

- Perhaps allow normalization options other than the defaults.