count_distinct

Extensions

count_distinct

count_distinct : An alternative to COUNT(DISTINCT …) aggregate, usable with HashAggregate

Overview

ID	Extension	Package	Version	Category	License	Language
4630	count_distinct	count_distinct	`3.0.2`	FUNC	BSD 2-Clause	C

Attribute	Has Binary	Has Library	Need Load	Has DDL	Relocatable	Trusted
--s-d-r	No	Yes	No	Yes	yes	no

Relationships
See Also	topn hll omnisketch ddsketch quantile lower_quantile first_last_agg aggs_for_arrays

no pg14 on el8/9 pgdg

Packages

Type	Repo	Version	PG Major Compatibility	Package Pattern	Dependencies
EXT	MIXED	`3.0.2`	18 17 16 15 14	`count_distinct`	-
RPM	PIGSTY	`3.0.2`	18 17 16 15 14	`count_distinct_$v`	-
DEB	PIGSTY	`3.0.2`	18 17 16 15 14	`postgresql-$v-count-distinct`	-

Linux / PG	PG18	PG17	PG16	PG15	PG14
el8.x86_64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
el8.aarch64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
el9.x86_64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
el9.aarch64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
el10.x86_64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
el10.aarch64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
d12.x86_64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
d12.aarch64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
d13.x86_64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
d13.aarch64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
u22.x86_64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
u22.aarch64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
u24.x86_64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2
u24.aarch64	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2	PIGSTY 3.0.2

Package	Version	OS	ORG	SIZE	File URL
`count_distinct_18`	`3.0.2`	el8.x86_64	pigsty	16.8 KiB	count_distinct_18-3.0.2-1PIGSTY.el8.x86_64.rpm
`count_distinct_18`	`3.0.2`	el8.x86_64	pgdg	23.1 KiB	count_distinct_18-3.0.2-1PGDG.rhel8.x86_64.rpm
`count_distinct_18`	`3.0.2`	el8.aarch64	pigsty	16.6 KiB	count_distinct_18-3.0.2-1PIGSTY.el8.aarch64.rpm
`count_distinct_18`	`3.0.2`	el8.aarch64	pgdg	22.8 KiB	count_distinct_18-3.0.2-1PGDG.rhel8.aarch64.rpm
`count_distinct_18`	`3.0.2`	el9.x86_64	pigsty	16.6 KiB	count_distinct_18-3.0.2-1PIGSTY.el9.x86_64.rpm
`count_distinct_18`	`3.0.2`	el9.x86_64	pgdg	22.9 KiB	count_distinct_18-3.0.2-1PGDG.rhel9.x86_64.rpm
`count_distinct_18`	`3.0.2`	el9.aarch64	pigsty	16.5 KiB	count_distinct_18-3.0.2-1PIGSTY.el9.aarch64.rpm
`count_distinct_18`	`3.0.2`	el9.aarch64	pgdg	22.3 KiB	count_distinct_18-3.0.2-1PGDG.rhel9.aarch64.rpm
`count_distinct_18`	`3.0.2`	el10.x86_64	pigsty	16.7 KiB	count_distinct_18-3.0.2-1PIGSTY.el10.x86_64.rpm
`count_distinct_18`	`3.0.2`	el10.x86_64	pgdg	23.3 KiB	count_distinct_18-3.0.2-1PGDG.rhel10.x86_64.rpm
`count_distinct_18`	`3.0.2`	el10.aarch64	pigsty	16.6 KiB	count_distinct_18-3.0.2-1PIGSTY.el10.aarch64.rpm
`count_distinct_18`	`3.0.2`	el10.aarch64	pgdg	22.9 KiB	count_distinct_18-3.0.2-1PGDG.rhel10.aarch64.rpm
`postgresql-18-count-distinct`	`3.0.2`	d12.x86_64	pigsty	34.8 KiB	postgresql-18-count-distinct_3.0.2-1PIGSTY~bookworm_amd64.deb
`postgresql-18-count-distinct`	`3.0.2`	d12.aarch64	pigsty	34.6 KiB	postgresql-18-count-distinct_3.0.2-1PIGSTY~bookworm_arm64.deb
`postgresql-18-count-distinct`	`3.0.2`	d13.x86_64	pigsty	34.8 KiB	postgresql-18-count-distinct_3.0.2-1PIGSTY~trixie_amd64.deb
`postgresql-18-count-distinct`	`3.0.2`	d13.aarch64	pigsty	34.6 KiB	postgresql-18-count-distinct_3.0.2-1PIGSTY~trixie_arm64.deb
`postgresql-18-count-distinct`	`3.0.2`	u22.x86_64	pigsty	36.4 KiB	postgresql-18-count-distinct_3.0.2-1PIGSTY~jammy_amd64.deb
`postgresql-18-count-distinct`	`3.0.2`	u22.aarch64	pigsty	36.4 KiB	postgresql-18-count-distinct_3.0.2-1PIGSTY~jammy_arm64.deb
`postgresql-18-count-distinct`	`3.0.2`	u24.x86_64	pigsty	35.8 KiB	postgresql-18-count-distinct_3.0.2-1PIGSTY~noble_amd64.deb
`postgresql-18-count-distinct`	`3.0.2`	u24.aarch64	pigsty	35.7 KiB	postgresql-18-count-distinct_3.0.2-1PIGSTY~noble_arm64.deb

Package	Version	OS	ORG	SIZE	File URL
`count_distinct_17`	`3.0.2`	el8.x86_64	pigsty	16.8 KiB	count_distinct_17-3.0.2-1PIGSTY.el8.x86_64.rpm
`count_distinct_17`	`3.0.1`	el8.x86_64	pgdg	20.7 KiB	count_distinct_17-3.0.1-6PGDG.rhel8.x86_64.rpm
`count_distinct_17`	`3.0.2`	el8.aarch64	pigsty	16.6 KiB	count_distinct_17-3.0.2-1PIGSTY.el8.aarch64.rpm
`count_distinct_17`	`3.0.1`	el8.aarch64	pgdg	20.4 KiB	count_distinct_17-3.0.1-6PGDG.rhel8.aarch64.rpm
`count_distinct_17`	`3.0.2`	el9.x86_64	pigsty	16.6 KiB	count_distinct_17-3.0.2-1PIGSTY.el9.x86_64.rpm
`count_distinct_17`	`3.0.1`	el9.x86_64	pgdg	20.6 KiB	count_distinct_17-3.0.1-6PGDG.rhel9.x86_64.rpm
`count_distinct_17`	`3.0.2`	el9.aarch64	pigsty	16.5 KiB	count_distinct_17-3.0.2-1PIGSTY.el9.aarch64.rpm
`count_distinct_17`	`3.0.1`	el9.aarch64	pgdg	20.2 KiB	count_distinct_17-3.0.1-6PGDG.rhel9.aarch64.rpm
`count_distinct_17`	`3.0.2`	el10.x86_64	pigsty	16.7 KiB	count_distinct_17-3.0.2-1PIGSTY.el10.x86_64.rpm
`count_distinct_17`	`3.0.2`	el10.x86_64	pgdg	23.3 KiB	count_distinct_17-3.0.2-1PGDG.rhel10.x86_64.rpm
`count_distinct_17`	`3.0.2`	el10.aarch64	pigsty	16.6 KiB	count_distinct_17-3.0.2-1PIGSTY.el10.aarch64.rpm
`count_distinct_17`	`3.0.2`	el10.aarch64	pgdg	22.9 KiB	count_distinct_17-3.0.2-1PGDG.rhel10.aarch64.rpm
`postgresql-17-count-distinct`	`3.0.2`	d12.x86_64	pigsty	34.7 KiB	postgresql-17-count-distinct_3.0.2-1PIGSTY~bookworm_amd64.deb
`postgresql-17-count-distinct`	`3.0.2`	d12.aarch64	pigsty	34.5 KiB	postgresql-17-count-distinct_3.0.2-1PIGSTY~bookworm_arm64.deb
`postgresql-17-count-distinct`	`3.0.2`	d13.x86_64	pigsty	34.7 KiB	postgresql-17-count-distinct_3.0.2-1PIGSTY~trixie_amd64.deb
`postgresql-17-count-distinct`	`3.0.2`	d13.aarch64	pigsty	34.5 KiB	postgresql-17-count-distinct_3.0.2-1PIGSTY~trixie_arm64.deb
`postgresql-17-count-distinct`	`3.0.2`	u22.x86_64	pigsty	37.4 KiB	postgresql-17-count-distinct_3.0.2-1PIGSTY~jammy_amd64.deb
`postgresql-17-count-distinct`	`3.0.2`	u22.aarch64	pigsty	37.3 KiB	postgresql-17-count-distinct_3.0.2-1PIGSTY~jammy_arm64.deb
`postgresql-17-count-distinct`	`3.0.2`	u24.x86_64	pigsty	35.7 KiB	postgresql-17-count-distinct_3.0.2-1PIGSTY~noble_amd64.deb
`postgresql-17-count-distinct`	`3.0.2`	u24.aarch64	pigsty	35.6 KiB	postgresql-17-count-distinct_3.0.2-1PIGSTY~noble_arm64.deb

Package	Version	OS	ORG	SIZE	File URL
`count_distinct_16`	`3.0.2`	el8.x86_64	pigsty	16.8 KiB	count_distinct_16-3.0.2-1PIGSTY.el8.x86_64.rpm
`count_distinct_16`	`3.0.1`	el8.x86_64	pgdg	20.6 KiB	count_distinct_16-3.0.1-5PGDG.rhel8.x86_64.rpm
`count_distinct_16`	`3.0.2`	el8.aarch64	pigsty	16.6 KiB	count_distinct_16-3.0.2-1PIGSTY.el8.aarch64.rpm
`count_distinct_16`	`3.0.1`	el8.aarch64	pgdg	20.3 KiB	count_distinct_16-3.0.1-5PGDG.rhel8.aarch64.rpm
`count_distinct_16`	`3.0.2`	el9.x86_64	pigsty	16.6 KiB	count_distinct_16-3.0.2-1PIGSTY.el9.x86_64.rpm
`count_distinct_16`	`3.0.1`	el9.x86_64	pgdg	20.4 KiB	count_distinct_16-3.0.1-5PGDG.rhel9.x86_64.rpm
`count_distinct_16`	`3.0.2`	el9.aarch64	pigsty	16.5 KiB	count_distinct_16-3.0.2-1PIGSTY.el9.aarch64.rpm
`count_distinct_16`	`3.0.1`	el9.aarch64	pgdg	19.8 KiB	count_distinct_16-3.0.1-5PGDG.rhel9.aarch64.rpm
`count_distinct_16`	`3.0.2`	el10.x86_64	pigsty	16.7 KiB	count_distinct_16-3.0.2-1PIGSTY.el10.x86_64.rpm
`count_distinct_16`	`3.0.2`	el10.x86_64	pgdg	23.3 KiB	count_distinct_16-3.0.2-1PGDG.rhel10.x86_64.rpm
`count_distinct_16`	`3.0.2`	el10.aarch64	pigsty	16.6 KiB	count_distinct_16-3.0.2-1PIGSTY.el10.aarch64.rpm
`count_distinct_16`	`3.0.2`	el10.aarch64	pgdg	22.9 KiB	count_distinct_16-3.0.2-1PGDG.rhel10.aarch64.rpm
`postgresql-16-count-distinct`	`3.0.2`	d12.x86_64	pigsty	34.7 KiB	postgresql-16-count-distinct_3.0.2-1PIGSTY~bookworm_amd64.deb
`postgresql-16-count-distinct`	`3.0.2`	d12.aarch64	pigsty	34.5 KiB	postgresql-16-count-distinct_3.0.2-1PIGSTY~bookworm_arm64.deb
`postgresql-16-count-distinct`	`3.0.2`	d13.x86_64	pigsty	34.7 KiB	postgresql-16-count-distinct_3.0.2-1PIGSTY~trixie_amd64.deb
`postgresql-16-count-distinct`	`3.0.2`	d13.aarch64	pigsty	34.5 KiB	postgresql-16-count-distinct_3.0.2-1PIGSTY~trixie_arm64.deb
`postgresql-16-count-distinct`	`3.0.2`	u22.x86_64	pigsty	37.4 KiB	postgresql-16-count-distinct_3.0.2-1PIGSTY~jammy_amd64.deb
`postgresql-16-count-distinct`	`3.0.2`	u22.aarch64	pigsty	37.3 KiB	postgresql-16-count-distinct_3.0.2-1PIGSTY~jammy_arm64.deb
`postgresql-16-count-distinct`	`3.0.2`	u24.x86_64	pigsty	35.7 KiB	postgresql-16-count-distinct_3.0.2-1PIGSTY~noble_amd64.deb
`postgresql-16-count-distinct`	`3.0.2`	u24.aarch64	pigsty	35.6 KiB	postgresql-16-count-distinct_3.0.2-1PIGSTY~noble_arm64.deb

Package	Version	OS	ORG	SIZE	File URL
`count_distinct_15`	`3.0.2`	el8.x86_64	pigsty	16.7 KiB	count_distinct_15-3.0.2-1PIGSTY.el8.x86_64.rpm
`count_distinct_15`	`3.0.1`	el8.x86_64	pgdg	31.7 KiB	count_distinct_15-3.0.1-3.rhel8.x86_64.rpm
`count_distinct_15`	`3.0.2`	el8.aarch64	pigsty	16.6 KiB	count_distinct_15-3.0.2-1PIGSTY.el8.aarch64.rpm
`count_distinct_15`	`3.0.1`	el8.aarch64	pgdg	31.2 KiB	count_distinct_15-3.0.1-3.rhel8.aarch64.rpm
`count_distinct_15`	`3.0.2`	el9.x86_64	pigsty	16.7 KiB	count_distinct_15-3.0.2-1PIGSTY.el9.x86_64.rpm
`count_distinct_15`	`3.0.1`	el9.x86_64	pgdg	32.4 KiB	count_distinct_15-3.0.1-3.rhel9.x86_64.rpm
`count_distinct_15`	`3.0.2`	el9.aarch64	pigsty	16.4 KiB	count_distinct_15-3.0.2-1PIGSTY.el9.aarch64.rpm
`count_distinct_15`	`3.0.1`	el9.aarch64	pgdg	31.6 KiB	count_distinct_15-3.0.1-3.rhel9.aarch64.rpm
`count_distinct_15`	`3.0.2`	el10.x86_64	pigsty	16.6 KiB	count_distinct_15-3.0.2-1PIGSTY.el10.x86_64.rpm
`count_distinct_15`	`3.0.2`	el10.x86_64	pgdg	23.2 KiB	count_distinct_15-3.0.2-1PGDG.rhel10.x86_64.rpm
`count_distinct_15`	`3.0.2`	el10.aarch64	pigsty	16.6 KiB	count_distinct_15-3.0.2-1PIGSTY.el10.aarch64.rpm
`count_distinct_15`	`3.0.2`	el10.aarch64	pgdg	22.9 KiB	count_distinct_15-3.0.2-1PGDG.rhel10.aarch64.rpm
`postgresql-15-count-distinct`	`3.0.2`	d12.x86_64	pigsty	34.5 KiB	postgresql-15-count-distinct_3.0.2-1PIGSTY~bookworm_amd64.deb
`postgresql-15-count-distinct`	`3.0.2`	d12.aarch64	pigsty	34.2 KiB	postgresql-15-count-distinct_3.0.2-1PIGSTY~bookworm_arm64.deb
`postgresql-15-count-distinct`	`3.0.2`	d13.x86_64	pigsty	34.5 KiB	postgresql-15-count-distinct_3.0.2-1PIGSTY~trixie_amd64.deb
`postgresql-15-count-distinct`	`3.0.2`	d13.aarch64	pigsty	34.3 KiB	postgresql-15-count-distinct_3.0.2-1PIGSTY~trixie_arm64.deb
`postgresql-15-count-distinct`	`3.0.2`	u22.x86_64	pigsty	37.1 KiB	postgresql-15-count-distinct_3.0.2-1PIGSTY~jammy_amd64.deb
`postgresql-15-count-distinct`	`3.0.2`	u22.aarch64	pigsty	37.1 KiB	postgresql-15-count-distinct_3.0.2-1PIGSTY~jammy_arm64.deb
`postgresql-15-count-distinct`	`3.0.2`	u24.x86_64	pigsty	35.5 KiB	postgresql-15-count-distinct_3.0.2-1PIGSTY~noble_amd64.deb
`postgresql-15-count-distinct`	`3.0.2`	u24.aarch64	pigsty	35.4 KiB	postgresql-15-count-distinct_3.0.2-1PIGSTY~noble_arm64.deb

Package	Version	OS	ORG	SIZE	File URL
`count_distinct_14`	`3.0.2`	el8.x86_64	pigsty	16.7 KiB	count_distinct_14-3.0.2-1PIGSTY.el8.x86_64.rpm
`count_distinct_14`	`3.0.1`	el8.x86_64	pgdg	32.1 KiB	count_distinct_14-3.0.1-3.rhel8.x86_64.rpm
`count_distinct_14`	`3.0.2`	el8.aarch64	pigsty	16.6 KiB	count_distinct_14-3.0.2-1PIGSTY.el8.aarch64.rpm
`count_distinct_14`	`3.0.1`	el8.aarch64	pgdg	31.1 KiB	count_distinct_14-3.0.1-3.rhel8.aarch64.rpm
`count_distinct_14`	`3.0.2`	el9.x86_64	pigsty	16.6 KiB	count_distinct_14-3.0.2-1PIGSTY.el9.x86_64.rpm
`count_distinct_14`	`3.0.2`	el9.aarch64	pigsty	16.4 KiB	count_distinct_14-3.0.2-1PIGSTY.el9.aarch64.rpm
`count_distinct_14`	`3.0.1`	el9.aarch64	pgdg	31.7 KiB	count_distinct_14-3.0.1-3.rhel9.aarch64.rpm
`count_distinct_14`	`3.0.2`	el10.x86_64	pigsty	16.6 KiB	count_distinct_14-3.0.2-1PIGSTY.el10.x86_64.rpm
`count_distinct_14`	`3.0.2`	el10.x86_64	pgdg	23.2 KiB	count_distinct_14-3.0.2-1PGDG.rhel10.x86_64.rpm
`count_distinct_14`	`3.0.2`	el10.aarch64	pigsty	16.5 KiB	count_distinct_14-3.0.2-1PIGSTY.el10.aarch64.rpm
`count_distinct_14`	`3.0.2`	el10.aarch64	pgdg	22.9 KiB	count_distinct_14-3.0.2-1PGDG.rhel10.aarch64.rpm
`postgresql-14-count-distinct`	`3.0.2`	d12.x86_64	pigsty	34.5 KiB	postgresql-14-count-distinct_3.0.2-1PIGSTY~bookworm_amd64.deb
`postgresql-14-count-distinct`	`3.0.2`	d12.aarch64	pigsty	34.2 KiB	postgresql-14-count-distinct_3.0.2-1PIGSTY~bookworm_arm64.deb
`postgresql-14-count-distinct`	`3.0.2`	d13.x86_64	pigsty	34.5 KiB	postgresql-14-count-distinct_3.0.2-1PIGSTY~trixie_amd64.deb
`postgresql-14-count-distinct`	`3.0.2`	d13.aarch64	pigsty	34.3 KiB	postgresql-14-count-distinct_3.0.2-1PIGSTY~trixie_arm64.deb
`postgresql-14-count-distinct`	`3.0.2`	u22.x86_64	pigsty	37.0 KiB	postgresql-14-count-distinct_3.0.2-1PIGSTY~jammy_amd64.deb
`postgresql-14-count-distinct`	`3.0.2`	u22.aarch64	pigsty	37.0 KiB	postgresql-14-count-distinct_3.0.2-1PIGSTY~jammy_arm64.deb
`postgresql-14-count-distinct`	`3.0.2`	u24.x86_64	pigsty	35.4 KiB	postgresql-14-count-distinct_3.0.2-1PIGSTY~noble_amd64.deb
`postgresql-14-count-distinct`	`3.0.2`	u24.aarch64	pigsty	35.4 KiB	postgresql-14-count-distinct_3.0.2-1PIGSTY~noble_arm64.deb

Source

Repository

github.com/tvondra/count_distinct

Source Tarball

count_distinct-3.0.2.tar.gz

pig build pkg count_distinct;		# build rpm/deb

Install

Make sure PGDG and PIGSTY repo available:

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

Install this extension with pig:

pig install count_distinct;		# install via package name, for the active PG version

pig install count_distinct -v 18;   # install for PG 18
pig install count_distinct -v 17;   # install for PG 17
pig install count_distinct -v 16;   # install for PG 16
pig install count_distinct -v 15;   # install for PG 15
pig install count_distinct -v 14;   # install for PG 14

Create this extension with:

CREATE EXTENSION count_distinct;

Last updated on 2026-03-08

lower_quantile omnisketch