hashlib

Stable hash functions for Postgres

Overview

Package	Version	Category	License	Language
`pg_hashlib`	`1.1`	UTIL	PostgreSQL	C

ID	Extension	Bin	Lib	Load	Create	Trust	Reloc	Schema
4400	`hashlib`	No	Yes	No	Yes	No	Yes	-

Related	`pgcrypto` `xxhash` `md5hash` `hashtypes` `pgsodium` `shacrypt` `cryptint` `pguecc`

build-deps: python3-docutils

Version

Type	Repo	Version	PG Ver	Package	Deps
EXT	PIGSTY	`1.1`	1817161514	`pg_hashlib`	-
RPM	PIGSTY	`1.1`	1817161514	`pg_hashlib_$v`	-
DEB	PIGSTY	`1.1`	1817161514	`postgresql-$v-pg-hashlib`	-

OS / PG	PG18	PG17	PG16	PG15	PG14
el8.x86_64	PIGSTY 1.1 el8.x86_64.pg18 : pg_hashlib_18 pg_hashlib_18-1.1-1PIGSTY.el8.x86_64.rpm PIGSTY · 1.1 · 27.5KiB	PIGSTY 1.1 el8.x86_64.pg17 : pg_hashlib_17 pg_hashlib_17-1.1-1PIGSTY.el8.x86_64.rpm PIGSTY · 1.1 · 27.6KiB	PIGSTY 1.1 el8.x86_64.pg16 : pg_hashlib_16 pg_hashlib_16-1.1-1PIGSTY.el8.x86_64.rpm PIGSTY · 1.1 · 27.6KiB	PIGSTY 1.1 el8.x86_64.pg15 : pg_hashlib_15 pg_hashlib_15-1.1-1PIGSTY.el8.x86_64.rpm PIGSTY · 1.1 · 27.8KiB	PIGSTY 1.1 el8.x86_64.pg14 : pg_hashlib_14 pg_hashlib_14-1.1-1PIGSTY.el8.x86_64.rpm PIGSTY · 1.1 · 27.8KiB
el8.aarch64	PIGSTY 1.1 el8.aarch64.pg18 : pg_hashlib_18 pg_hashlib_18-1.1-1PIGSTY.el8.aarch64.rpm PIGSTY · 1.1 · 28.7KiB	PIGSTY 1.1 el8.aarch64.pg17 : pg_hashlib_17 pg_hashlib_17-1.1-1PIGSTY.el8.aarch64.rpm PIGSTY · 1.1 · 28.7KiB	PIGSTY 1.1 el8.aarch64.pg16 : pg_hashlib_16 pg_hashlib_16-1.1-1PIGSTY.el8.aarch64.rpm PIGSTY · 1.1 · 28.7KiB	PIGSTY 1.1 el8.aarch64.pg15 : pg_hashlib_15 pg_hashlib_15-1.1-1PIGSTY.el8.aarch64.rpm PIGSTY · 1.1 · 28.8KiB	PIGSTY 1.1 el8.aarch64.pg14 : pg_hashlib_14 pg_hashlib_14-1.1-1PIGSTY.el8.aarch64.rpm PIGSTY · 1.1 · 28.8KiB
el9.x86_64	PIGSTY 1.1 el9.x86_64.pg18 : pg_hashlib_18 pg_hashlib_18-1.1-1PIGSTY.el9.x86_64.rpm PIGSTY · 1.1 · 27.0KiB	PIGSTY 1.1 el9.x86_64.pg17 : pg_hashlib_17 pg_hashlib_17-1.1-1PIGSTY.el9.x86_64.rpm PIGSTY · 1.1 · 27.0KiB	PIGSTY 1.1 el9.x86_64.pg16 : pg_hashlib_16 pg_hashlib_16-1.1-1PIGSTY.el9.x86_64.rpm PIGSTY · 1.1 · 27.0KiB	PIGSTY 1.1 el9.x86_64.pg15 : pg_hashlib_15 pg_hashlib_15-1.1-1PIGSTY.el9.x86_64.rpm PIGSTY · 1.1 · 27.1KiB	PIGSTY 1.1 el9.x86_64.pg14 : pg_hashlib_14 pg_hashlib_14-1.1-1PIGSTY.el9.x86_64.rpm PIGSTY · 1.1 · 27.1KiB
el9.aarch64	PIGSTY 1.1 el9.aarch64.pg18 : pg_hashlib_18 pg_hashlib_18-1.1-1PIGSTY.el9.aarch64.rpm PIGSTY · 1.1 · 27.3KiB	PIGSTY 1.1 el9.aarch64.pg17 : pg_hashlib_17 pg_hashlib_17-1.1-1PIGSTY.el9.aarch64.rpm PIGSTY · 1.1 · 27.3KiB	PIGSTY 1.1 el9.aarch64.pg16 : pg_hashlib_16 pg_hashlib_16-1.1-1PIGSTY.el9.aarch64.rpm PIGSTY · 1.1 · 27.3KiB	PIGSTY 1.1 el9.aarch64.pg15 : pg_hashlib_15 pg_hashlib_15-1.1-1PIGSTY.el9.aarch64.rpm PIGSTY · 1.1 · 27.5KiB	PIGSTY 1.1 el9.aarch64.pg14 : pg_hashlib_14 pg_hashlib_14-1.1-1PIGSTY.el9.aarch64.rpm PIGSTY · 1.1 · 27.5KiB
el10.x86_64	PIGSTY 1.1 el10.x86_64.pg18 : pg_hashlib_18 pg_hashlib_18-1.1-1PIGSTY.el10.x86_64.rpm PIGSTY · 1.1 · 27.4KiB	PIGSTY 1.1 el10.x86_64.pg17 : pg_hashlib_17 pg_hashlib_17-1.1-1PIGSTY.el10.x86_64.rpm PIGSTY · 1.1 · 27.4KiB	PIGSTY 1.1 el10.x86_64.pg16 : pg_hashlib_16 pg_hashlib_16-1.1-1PIGSTY.el10.x86_64.rpm PIGSTY · 1.1 · 27.4KiB	PIGSTY 1.1 el10.x86_64.pg15 : pg_hashlib_15 pg_hashlib_15-1.1-1PIGSTY.el10.x86_64.rpm PIGSTY · 1.1 · 27.6KiB	PIGSTY 1.1 el10.x86_64.pg14 : pg_hashlib_14 pg_hashlib_14-1.1-1PIGSTY.el10.x86_64.rpm PIGSTY · 1.1 · 27.6KiB
el10.aarch64	PIGSTY 1.1 el10.aarch64.pg18 : pg_hashlib_18 pg_hashlib_18-1.1-1PIGSTY.el10.aarch64.rpm PIGSTY · 1.1 · 27.4KiB	PIGSTY 1.1 el10.aarch64.pg17 : pg_hashlib_17 pg_hashlib_17-1.1-1PIGSTY.el10.aarch64.rpm PIGSTY · 1.1 · 27.4KiB	PIGSTY 1.1 el10.aarch64.pg16 : pg_hashlib_16 pg_hashlib_16-1.1-1PIGSTY.el10.aarch64.rpm PIGSTY · 1.1 · 27.4KiB	PIGSTY 1.1 el10.aarch64.pg15 : pg_hashlib_15 pg_hashlib_15-1.1-1PIGSTY.el10.aarch64.rpm PIGSTY · 1.1 · 27.6KiB	PIGSTY 1.1 el10.aarch64.pg14 : pg_hashlib_14 pg_hashlib_14-1.1-1PIGSTY.el10.aarch64.rpm PIGSTY · 1.1 · 27.6KiB
d12.x86_64	PIGSTY 1.1 d12.x86_64.pg18 : postgresql-18-pg-hashlib postgresql-18-pg-hashlib_1.1-1PIGSTY~bookworm_amd64.deb PIGSTY · 1.1 · 45.7KiB	PIGSTY 1.1 d12.x86_64.pg17 : postgresql-17-pg-hashlib postgresql-17-pg-hashlib_1.1-1PIGSTY~bookworm_amd64.deb PIGSTY · 1.1 · 45.8KiB	PIGSTY 1.1 d12.x86_64.pg16 : postgresql-16-pg-hashlib postgresql-16-pg-hashlib_1.1-1PIGSTY~bookworm_amd64.deb PIGSTY · 1.1 · 45.8KiB	PIGSTY 1.1 d12.x86_64.pg15 : postgresql-15-pg-hashlib postgresql-15-pg-hashlib_1.1-1PIGSTY~bookworm_amd64.deb PIGSTY · 1.1 · 45.9KiB	PIGSTY 1.1 d12.x86_64.pg14 : postgresql-14-pg-hashlib postgresql-14-pg-hashlib_1.1-1PIGSTY~bookworm_amd64.deb PIGSTY · 1.1 · 45.8KiB
d12.aarch64	PIGSTY 1.1 d12.aarch64.pg18 : postgresql-18-pg-hashlib postgresql-18-pg-hashlib_1.1-1PIGSTY~bookworm_arm64.deb PIGSTY · 1.1 · 46.1KiB	PIGSTY 1.1 d12.aarch64.pg17 : postgresql-17-pg-hashlib postgresql-17-pg-hashlib_1.1-1PIGSTY~bookworm_arm64.deb PIGSTY · 1.1 · 46.0KiB	PIGSTY 1.1 d12.aarch64.pg16 : postgresql-16-pg-hashlib postgresql-16-pg-hashlib_1.1-1PIGSTY~bookworm_arm64.deb PIGSTY · 1.1 · 46.0KiB	PIGSTY 1.1 d12.aarch64.pg15 : postgresql-15-pg-hashlib postgresql-15-pg-hashlib_1.1-1PIGSTY~bookworm_arm64.deb PIGSTY · 1.1 · 45.9KiB	PIGSTY 1.1 d12.aarch64.pg14 : postgresql-14-pg-hashlib postgresql-14-pg-hashlib_1.1-1PIGSTY~bookworm_arm64.deb PIGSTY · 1.1 · 45.9KiB
d13.x86_64	PIGSTY 1.1 d13.x86_64.pg18 : postgresql-18-pg-hashlib postgresql-18-pg-hashlib_1.1-1PIGSTY~trixie_amd64.deb PIGSTY · 1.1 · 45.8KiB	PIGSTY 1.1 d13.x86_64.pg17 : postgresql-17-pg-hashlib postgresql-17-pg-hashlib_1.1-1PIGSTY~trixie_amd64.deb PIGSTY · 1.1 · 46.0KiB	PIGSTY 1.1 d13.x86_64.pg16 : postgresql-16-pg-hashlib postgresql-16-pg-hashlib_1.1-1PIGSTY~trixie_amd64.deb PIGSTY · 1.1 · 46.0KiB	PIGSTY 1.1 d13.x86_64.pg15 : postgresql-15-pg-hashlib postgresql-15-pg-hashlib_1.1-1PIGSTY~trixie_amd64.deb PIGSTY · 1.1 · 46.0KiB	PIGSTY 1.1 d13.x86_64.pg14 : postgresql-14-pg-hashlib postgresql-14-pg-hashlib_1.1-1PIGSTY~trixie_amd64.deb PIGSTY · 1.1 · 46.0KiB
d13.aarch64	PIGSTY 1.1 d13.aarch64.pg18 : postgresql-18-pg-hashlib postgresql-18-pg-hashlib_1.1-1PIGSTY~trixie_arm64.deb PIGSTY · 1.1 · 46.2KiB	PIGSTY 1.1 d13.aarch64.pg17 : postgresql-17-pg-hashlib postgresql-17-pg-hashlib_1.1-1PIGSTY~trixie_arm64.deb PIGSTY · 1.1 · 46.2KiB	PIGSTY 1.1 d13.aarch64.pg16 : postgresql-16-pg-hashlib postgresql-16-pg-hashlib_1.1-1PIGSTY~trixie_arm64.deb PIGSTY · 1.1 · 46.2KiB	PIGSTY 1.1 d13.aarch64.pg15 : postgresql-15-pg-hashlib postgresql-15-pg-hashlib_1.1-1PIGSTY~trixie_arm64.deb PIGSTY · 1.1 · 46.1KiB	PIGSTY 1.1 d13.aarch64.pg14 : postgresql-14-pg-hashlib postgresql-14-pg-hashlib_1.1-1PIGSTY~trixie_arm64.deb PIGSTY · 1.1 · 46.0KiB
u22.x86_64	PIGSTY 1.1 u22.x86_64.pg18 : postgresql-18-pg-hashlib postgresql-18-pg-hashlib_1.1-1PIGSTY~jammy_amd64.deb PIGSTY · 1.1 · 49.0KiB	PIGSTY 1.1 u22.x86_64.pg17 : postgresql-17-pg-hashlib postgresql-17-pg-hashlib_1.1-1PIGSTY~jammy_amd64.deb PIGSTY · 1.1 · 49.9KiB	PIGSTY 1.1 u22.x86_64.pg16 : postgresql-16-pg-hashlib postgresql-16-pg-hashlib_1.1-1PIGSTY~jammy_amd64.deb PIGSTY · 1.1 · 49.9KiB	PIGSTY 1.1 u22.x86_64.pg15 : postgresql-15-pg-hashlib postgresql-15-pg-hashlib_1.1-1PIGSTY~jammy_amd64.deb PIGSTY · 1.1 · 50.3KiB	PIGSTY 1.1 u22.x86_64.pg14 : postgresql-14-pg-hashlib postgresql-14-pg-hashlib_1.1-1PIGSTY~jammy_amd64.deb PIGSTY · 1.1 · 50.3KiB
u22.aarch64	PIGSTY 1.1 u22.aarch64.pg18 : postgresql-18-pg-hashlib postgresql-18-pg-hashlib_1.1-1PIGSTY~jammy_arm64.deb PIGSTY · 1.1 · 49.5KiB	PIGSTY 1.1 u22.aarch64.pg17 : postgresql-17-pg-hashlib postgresql-17-pg-hashlib_1.1-1PIGSTY~jammy_arm64.deb PIGSTY · 1.1 · 50.0KiB	PIGSTY 1.1 u22.aarch64.pg16 : postgresql-16-pg-hashlib postgresql-16-pg-hashlib_1.1-1PIGSTY~jammy_arm64.deb PIGSTY · 1.1 · 50.0KiB	PIGSTY 1.1 u22.aarch64.pg15 : postgresql-15-pg-hashlib postgresql-15-pg-hashlib_1.1-1PIGSTY~jammy_arm64.deb PIGSTY · 1.1 · 50.6KiB	PIGSTY 1.1 u22.aarch64.pg14 : postgresql-14-pg-hashlib postgresql-14-pg-hashlib_1.1-1PIGSTY~jammy_arm64.deb PIGSTY · 1.1 · 50.6KiB
u24.x86_64	PIGSTY 1.1 u24.x86_64.pg18 : postgresql-18-pg-hashlib postgresql-18-pg-hashlib_1.1-1PIGSTY~noble_amd64.deb PIGSTY · 1.1 · 47.8KiB	PIGSTY 1.1 u24.x86_64.pg17 : postgresql-17-pg-hashlib postgresql-17-pg-hashlib_1.1-1PIGSTY~noble_amd64.deb PIGSTY · 1.1 · 48.0KiB	PIGSTY 1.1 u24.x86_64.pg16 : postgresql-16-pg-hashlib postgresql-16-pg-hashlib_1.1-1PIGSTY~noble_amd64.deb PIGSTY · 1.1 · 48.0KiB	PIGSTY 1.1 u24.x86_64.pg15 : postgresql-15-pg-hashlib postgresql-15-pg-hashlib_1.1-1PIGSTY~noble_amd64.deb PIGSTY · 1.1 · 48.1KiB	PIGSTY 1.1 u24.x86_64.pg14 : postgresql-14-pg-hashlib postgresql-14-pg-hashlib_1.1-1PIGSTY~noble_amd64.deb PIGSTY · 1.1 · 48.1KiB
u24.aarch64	PIGSTY 1.1 u24.aarch64.pg18 : postgresql-18-pg-hashlib postgresql-18-pg-hashlib_1.1-1PIGSTY~noble_arm64.deb PIGSTY · 1.1 · 48.6KiB	PIGSTY 1.1 u24.aarch64.pg17 : postgresql-17-pg-hashlib postgresql-17-pg-hashlib_1.1-1PIGSTY~noble_arm64.deb PIGSTY · 1.1 · 48.5KiB	PIGSTY 1.1 u24.aarch64.pg16 : postgresql-16-pg-hashlib postgresql-16-pg-hashlib_1.1-1PIGSTY~noble_arm64.deb PIGSTY · 1.1 · 48.5KiB	PIGSTY 1.1 u24.aarch64.pg15 : postgresql-15-pg-hashlib postgresql-15-pg-hashlib_1.1-1PIGSTY~noble_arm64.deb PIGSTY · 1.1 · 48.5KiB	PIGSTY 1.1 u24.aarch64.pg14 : postgresql-14-pg-hashlib postgresql-14-pg-hashlib_1.1-1PIGSTY~noble_arm64.deb PIGSTY · 1.1 · 48.5KiB
u26.x86_64	PIGSTY 1.1 u26.x86_64.pg18 : postgresql-18-pg-hashlib postgresql-18-pg-hashlib_1.1-1PIGSTY~resolute_amd64.deb PIGSTY · 1.1 · 43.7KiB	PIGSTY 1.1 u26.x86_64.pg17 : postgresql-17-pg-hashlib postgresql-17-pg-hashlib_1.1-1PIGSTY~resolute_amd64.deb PIGSTY · 1.1 · 43.7KiB	PIGSTY 1.1 u26.x86_64.pg16 : postgresql-16-pg-hashlib postgresql-16-pg-hashlib_1.1-1PIGSTY~resolute_amd64.deb PIGSTY · 1.1 · 43.7KiB	PIGSTY 1.1 u26.x86_64.pg15 : postgresql-15-pg-hashlib postgresql-15-pg-hashlib_1.1-1PIGSTY~resolute_amd64.deb PIGSTY · 1.1 · 44.0KiB	PIGSTY 1.1 u26.x86_64.pg14 : postgresql-14-pg-hashlib postgresql-14-pg-hashlib_1.1-1PIGSTY~resolute_amd64.deb PIGSTY · 1.1 · 43.9KiB
u26.aarch64	PIGSTY 1.1 u26.aarch64.pg18 : postgresql-18-pg-hashlib postgresql-18-pg-hashlib_1.1-1PIGSTY~resolute_arm64.deb PIGSTY · 1.1 · 43.6KiB	PIGSTY 1.1 u26.aarch64.pg17 : postgresql-17-pg-hashlib postgresql-17-pg-hashlib_1.1-1PIGSTY~resolute_arm64.deb PIGSTY · 1.1 · 43.6KiB	PIGSTY 1.1 u26.aarch64.pg16 : postgresql-16-pg-hashlib postgresql-16-pg-hashlib_1.1-1PIGSTY~resolute_arm64.deb PIGSTY · 1.1 · 43.6KiB	PIGSTY 1.1 u26.aarch64.pg15 : postgresql-15-pg-hashlib postgresql-15-pg-hashlib_1.1-1PIGSTY~resolute_arm64.deb PIGSTY · 1.1 · 44.2KiB	PIGSTY 1.1 u26.aarch64.pg14 : postgresql-14-pg-hashlib postgresql-14-pg-hashlib_1.1-1PIGSTY~resolute_arm64.deb PIGSTY · 1.1 · 44.2KiB

Build

You can build the RPM / DEB packages for pg_hashlib using pig build:

pig build pkg pg_hashlib         # build RPM / DEB packages

Install

You can install pg_hashlib directly. First, make sure the PGDG and PIGSTY repositories are added and enabled:

pig repo add pgsql -u          # Add repo and update cache

Install the extension using pig or apt/yum/dnf:

Install

pig install pg_hashlib;          # Install for current active PG version

pig

pig ext install -y pg_hashlib -v 18  # PG 18
pig ext install -y pg_hashlib -v 17  # PG 17
pig ext install -y pg_hashlib -v 16  # PG 16
pig ext install -y pg_hashlib -v 15  # PG 15
pig ext install -y pg_hashlib -v 14  # PG 14

dnf

dnf install -y pg_hashlib_18       # PG 18
dnf install -y pg_hashlib_17       # PG 17
dnf install -y pg_hashlib_16       # PG 16
dnf install -y pg_hashlib_15       # PG 15
dnf install -y pg_hashlib_14       # PG 14

apt

apt install -y postgresql-18-pg-hashlib   # PG 18
apt install -y postgresql-17-pg-hashlib   # PG 17
apt install -y postgresql-16-pg-hashlib   # PG 16
apt install -y postgresql-15-pg-hashlib   # PG 15
apt install -y postgresql-14-pg-hashlib   # PG 14

Create Extension:

CREATE EXTENSION hashlib;

Usage

hashlib: Stable hash functions library for PostgreSQL

Provides stable hash functions whose implementations do not change across PostgreSQL versions.

String Hashing (32-bit)

SELECT hash_string('hello', 'crc32');
SELECT hash_string('hello', 'murmur3');

With optional initial value:

SELECT hash_string('hello', 'crc32', 42);

String Hashing (64-bit)

SELECT hash64_string('hello', 'city64');
SELECT hash64_string('hello', 'siphash24');
SELECT hash64_string('hello', 'lookup3');

String Hashing (128-bit)

SELECT hash128_string('hello', 'md5');
SELECT hash128_string('hello', 'city128');
SELECT hash128_string('hello', 'spooky');

Integer Hashing

SELECT hash_int4(42);        -- 32-bit hash of 32-bit integer
SELECT hash_int8(42::bigint); -- 64-bit hash of 64-bit integer

Available Algorithms

Algorithm	CPU-indep	Bits	Description
`crc32`	yes	32	CRC32
`murmur3`	no	32	MurmurHash v3
`md5`	yes	128	MD5
`city64`	no	64	CityHash64
`city128`	no	128	CityHash128
`siphash24`	yes	64	SipHash-2-4
`spooky`	no	128	SpookyHash
`lookup2`	no	64	Jenkins lookup2
`lookup3`	no	64	Jenkins lookup3 CPU-native
`lookup3be`	yes	64	Jenkins lookup3 big-endian
`lookup3le`	yes	64	Jenkins lookup3 little-endian
`pgsql84`	no	64	Hacked lookup3 in Postgres 8.4+

Integer algorithms: wang32, wang32mult, jenkins (32-bit); wang64, wang64to32 (64-bit). All are reversible (1:1 mapping), useful for creating random sort orders over unique IDs.

hashlib

Overview

Version

Build

Install

Usage

String Hashing (32-bit)

String Hashing (64-bit)

String Hashing (128-bit)

Integer Hashing

Available Algorithms

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