Hamming distance function for PostgreSQL¶ ↑

Computes the hamming distance for 2 64bit unsigned integers.

Requirements¶ ↑

• PostgreSQL Server development libraries. (debian: postgresql-server-dev-9.0 e.g.)

• pg_config in PATH.

• GNU C compiler.

• GNU make.

Installing¶ ↑

PSQL_DB=<database name> make install

Example¶ ↑

select hamming_distance(4, 3); #=> 3

License¶ ↑

CC BY-SA 3.0