Extensions / Functions and aggregates
Helper C functions and aggregates for PostgreSQL bit varying data.
pgext.cloud · Source code · Documentation · Control file
| Package | bitstring_helpers |
|---|---|
| Version | 1.0 |
| Repository | Unspecified |
| Extension type | Standard |
| Requires CREATE EXTENSION | Yes |
| Requires preload | No |
| Trusted | No |
| Relocatable | Yes |
| Stars | 1 |
| Latest commit | 2013-11-05 |
| Catalogue updated | 2026-08-30 |
| bktree | SP-GiST BK-tree index extension for 64-bit perceptual hashes and Hamming-distance searches. |
| pg_phash | Calculate Hamming distance between decimal-encoded perceptual image hashes |
| hamming_distance | Hamming distance and similarity functions for hexadecimal feature-vector strings. |
| tanimoto | Fast C implementation of the Tanimoto similarity coefficient for PostgreSQL bit-varying fingerprints. |
| popcount | provide population-count functions for PostgreSQL bit(n) values |
| colors | C functions for perceptual color-distance calculations in the CIE L*a*b* color space |
| recommend | Experimental C extension providing scalar distance, text similarity, and one-dimensional array similarity functions derived from smlar. |
| pg_similarity | support similarity queries |