Hamming distance function for PostgreSQL¶ ↑
Computes the hamming distance for 2 64bit unsigned integers.
Requirements¶ ↑
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PostgreSQL Server development libraries. (debian: postgresql-server-dev-9.3 e.g.)
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pg_config in PATH.
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GNU C compiler.
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GNU make.
Installing¶ ↑
PSQL_DB=<database name> make install
Example¶ ↑
CREATE EXTENSION hamming_distance; SELECT hamming_distance(4, 3); #=> 3