sqlite3-uuid

This SQLite extension implements functions for creating RFC 4122 compliant UUIDs.

Installation

1. Install the necessary development headers. Mac OS X ships with SQLite and the development headers, but you may need to install them on Linux.

   • Debian / Ubuntu:

     sudo apt-get install libsqlite3-dev libssl-dev uuid-dev
     

   • Red Hat / CentOS:

     sudo yum install openssl-devel sqlite-devel uuid-devel
     

2. Build the extension. The build will produce a shared library for your platform under dist/.

   make
   

3. Load the extension using your SQLite API of choice. For example, in Python,

   import sqlite3
   
   con = sqlite3.connect(':memory:')
   
   con.enable_load_extension(True)
   con.load_extension('/path/to/uuid')
   con.enable_load_extension(False)
   
   for row in con.execute('SELECT uuid4();'):
       print(row)
   

Usage

uuid1()

Generate a version 1 UUID, based on the time and host machine's MAC address.

SELECT uuid1();
d5a80b20-0d8f-11e5-b8cb-080027b6ec40

uuid3()

Generate a version 3 (MD5) namespace UUID.

SELECT uuid3(uuid_ns_dns(), 'example.org');
04738bdf-b25a-3829-a801-b21a1d25095b

uuid4()

Generate a version 4 (random) UUID.

SELECT uuid4();
1e607604-f360-4fa5-863a-bc91adc70bb9

uuid5()

Generate a version 5 (SHA1) namespace UUID.

SELECT uuid3(uuid_ns_dns(), 'example.org');
aad03681-8b63-5304-89e0-8ca8f49461b5

uuid_nil()

Generate the nil UUID.

SELECT uuid_nil();
00000000-0000-0000-0000-000000000000

Namespaces

DNS

SELECT uuid_ns_dns();
6ba7b810-9dad-11d1-80b4-00c04fd430c8

OID

SELECT uuid_ns_oid();
6ba7b812-9dad-11d1-80b4-00c04fd430c8

URL

SELECT uuid_ns_url();
6ba7b811-9dad-11d1-80b4-00c04fd430c8

X500

SELECT uuid_ns_x500();
6ba7b814-9dad-11d1-80b4-00c04fd430c8

Converting between types

uuid_to_blob()

Convert a TEXT UUID to a 16-byte BLOB.

sqlite3 -cmd '.load uuid' uuid.db 'SELECT uuid_to_blob("3dfe5c62-e543-46ff-a2e0-0b1017506be0");' |
  tr -d '\n' |
  hexdump -C
00000000  3d fe 5c 62 e5 43 46 ff  a2 e0 0b 10 17 50 6b e0  |=.\b.CF......Pk.|
00000010

uuid_to_text()

Convert a 16-byte BLOB to a TEXT UUID.

SELECT uuid_to_text(uuid_to_blob('3dfe5c62-e543-46ff-a2e0-0b1017506be0'));
3dfe5c62-e543-46ff-a2e0-0b1017506be0

Notes

This extension only supports Linux and Mac OS X at the moment.