count_distinct

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

Overview

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

ID	Extension	Bin	Lib	Load	Create	Trust	Reloc	Schema
4630	`count_distinct`	No	Yes	No	Yes	No	Yes	-

Related	`ddsketch` `tdigest` `topn` `omnisketch` `datasketches` `hll` `intagg` `intarray`

no pg14 on el8/9 pgdg

Version

Type	Repo	Version	PG Ver	Package	Deps
EXT	MIXED	`3.0.2`	1817161514	`count_distinct`	-
RPM	PIGSTY	`3.0.2`	1817161514	`count_distinct_$v`	-
DEB	PIGSTY	`3.0.2`	1817161514	`postgresql-$v-count-distinct`	-

OS / PG	PG18	PG17	PG16	PG15	PG14
el8.x86_64	PIGSTY 3.0.2 el8.x86_64.pg18 : count_distinct_18 count_distinct_18-3.0.2-1PIGSTY.el8.x86_64.rpm PIGSTY · 3.0.2 · 16.8KiB count_distinct_18-3.0.2-1PGDG.rhel8.x86_64.rpm PGDG · 3.0.2 · 23.1KiB	PIGSTY 3.0.2 el8.x86_64.pg17 : count_distinct_17 count_distinct_17-3.0.2-1PIGSTY.el8.x86_64.rpm PIGSTY · 3.0.2 · 16.8KiB count_distinct_17-3.0.1-6PGDG.rhel8.x86_64.rpm PGDG · 3.0.1 · 20.7KiB	PIGSTY 3.0.2 el8.x86_64.pg16 : count_distinct_16 count_distinct_16-3.0.2-1PIGSTY.el8.x86_64.rpm PIGSTY · 3.0.2 · 16.8KiB count_distinct_16-3.0.1-5PGDG.rhel8.x86_64.rpm PGDG · 3.0.1 · 20.6KiB	PIGSTY 3.0.2 el8.x86_64.pg15 : count_distinct_15 count_distinct_15-3.0.2-1PIGSTY.el8.x86_64.rpm PIGSTY · 3.0.2 · 16.7KiB count_distinct_15-3.0.1-3.rhel8.x86_64.rpm PGDG · 3.0.1 · 31.7KiB	PIGSTY 3.0.2 el8.x86_64.pg14 : count_distinct_14 count_distinct_14-3.0.2-1PIGSTY.el8.x86_64.rpm PIGSTY · 3.0.2 · 16.7KiB count_distinct_14-3.0.1-3.rhel8.x86_64.rpm PGDG · 3.0.1 · 32.1KiB
el8.aarch64	PIGSTY 3.0.2 el8.aarch64.pg18 : count_distinct_18 count_distinct_18-3.0.2-1PIGSTY.el8.aarch64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_18-3.0.2-1PGDG.rhel8.aarch64.rpm PGDG · 3.0.2 · 22.8KiB	PIGSTY 3.0.2 el8.aarch64.pg17 : count_distinct_17 count_distinct_17-3.0.2-1PIGSTY.el8.aarch64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_17-3.0.1-6PGDG.rhel8.aarch64.rpm PGDG · 3.0.1 · 20.4KiB	PIGSTY 3.0.2 el8.aarch64.pg16 : count_distinct_16 count_distinct_16-3.0.2-1PIGSTY.el8.aarch64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_16-3.0.1-5PGDG.rhel8.aarch64.rpm PGDG · 3.0.1 · 20.3KiB	PIGSTY 3.0.2 el8.aarch64.pg15 : count_distinct_15 count_distinct_15-3.0.2-1PIGSTY.el8.aarch64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_15-3.0.1-3.rhel8.aarch64.rpm PGDG · 3.0.1 · 31.2KiB	PIGSTY 3.0.2 el8.aarch64.pg14 : count_distinct_14 count_distinct_14-3.0.2-1PIGSTY.el8.aarch64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_14-3.0.1-3.rhel8.aarch64.rpm PGDG · 3.0.1 · 31.1KiB
el9.x86_64	PGDG 3.0.2 el9.x86_64.pg18 : count_distinct_18 count_distinct_18-3.0.2-3PGDG.rhel9.8.x86_64.rpm PGDG · 3.0.2 · 22.9KiB count_distinct_18-3.0.2-1PIGSTY.el9.x86_64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_18-3.0.2-1PGDG.rhel9.x86_64.rpm PGDG · 3.0.2 · 22.9KiB	PGDG 3.0.2 el9.x86_64.pg17 : count_distinct_17 count_distinct_17-3.0.2-3PGDG.rhel9.8.x86_64.rpm PGDG · 3.0.2 · 22.8KiB count_distinct_17-3.0.2-1PIGSTY.el9.x86_64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_17-3.0.1-6PGDG.rhel9.x86_64.rpm PGDG · 3.0.1 · 20.6KiB	PGDG 3.0.2 el9.x86_64.pg16 : count_distinct_16 count_distinct_16-3.0.2-3PGDG.rhel9.8.x86_64.rpm PGDG · 3.0.2 · 22.8KiB count_distinct_16-3.0.2-1PIGSTY.el9.x86_64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_16-3.0.1-5PGDG.rhel9.x86_64.rpm PGDG · 3.0.1 · 20.4KiB	PGDG 3.0.2 el9.x86_64.pg15 : count_distinct_15 count_distinct_15-3.0.2-3PGDG.rhel9.8.x86_64.rpm PGDG · 3.0.2 · 22.8KiB count_distinct_15-3.0.2-1PIGSTY.el9.x86_64.rpm PIGSTY · 3.0.2 · 16.7KiB count_distinct_15-3.0.1-3.rhel9.x86_64.rpm PGDG · 3.0.1 · 32.4KiB	PGDG 3.0.2 el9.x86_64.pg14 : count_distinct_14 count_distinct_14-3.0.2-3PGDG.rhel9.8.x86_64.rpm PGDG · 3.0.2 · 22.8KiB count_distinct_14-3.0.2-1PIGSTY.el9.x86_64.rpm PIGSTY · 3.0.2 · 16.6KiB
el9.aarch64	PGDG 3.0.2 el9.aarch64.pg18 : count_distinct_18 count_distinct_18-3.0.2-3PGDG.rhel9.8.aarch64.rpm PGDG · 3.0.2 · 22.4KiB count_distinct_18-3.0.2-1PIGSTY.el9.aarch64.rpm PIGSTY · 3.0.2 · 16.5KiB count_distinct_18-3.0.2-1PGDG.rhel9.aarch64.rpm PGDG · 3.0.2 · 22.3KiB	PGDG 3.0.2 el9.aarch64.pg17 : count_distinct_17 count_distinct_17-3.0.2-3PGDG.rhel9.8.aarch64.rpm PGDG · 3.0.2 · 22.4KiB count_distinct_17-3.0.2-1PIGSTY.el9.aarch64.rpm PIGSTY · 3.0.2 · 16.5KiB count_distinct_17-3.0.1-6PGDG.rhel9.aarch64.rpm PGDG · 3.0.1 · 20.2KiB	PGDG 3.0.2 el9.aarch64.pg16 : count_distinct_16 count_distinct_16-3.0.2-3PGDG.rhel9.8.aarch64.rpm PGDG · 3.0.2 · 22.4KiB count_distinct_16-3.0.2-1PIGSTY.el9.aarch64.rpm PIGSTY · 3.0.2 · 16.5KiB count_distinct_16-3.0.1-5PGDG.rhel9.aarch64.rpm PGDG · 3.0.1 · 19.8KiB	PGDG 3.0.2 el9.aarch64.pg15 : count_distinct_15 count_distinct_15-3.0.2-3PGDG.rhel9.8.aarch64.rpm PGDG · 3.0.2 · 22.4KiB count_distinct_15-3.0.2-1PIGSTY.el9.aarch64.rpm PIGSTY · 3.0.2 · 16.4KiB count_distinct_15-3.0.1-3.rhel9.aarch64.rpm PGDG · 3.0.1 · 31.6KiB	PGDG 3.0.2 el9.aarch64.pg14 : count_distinct_14 count_distinct_14-3.0.2-3PGDG.rhel9.8.aarch64.rpm PGDG · 3.0.2 · 22.4KiB count_distinct_14-3.0.2-1PIGSTY.el9.aarch64.rpm PIGSTY · 3.0.2 · 16.4KiB count_distinct_14-3.0.1-3.rhel9.aarch64.rpm PGDG · 3.0.1 · 31.7KiB
el10.x86_64	PGDG 3.0.2 el10.x86_64.pg18 : count_distinct_18 count_distinct_18-3.0.2-3PGDG.rhel10.2.x86_64.rpm PGDG · 3.0.2 · 23.0KiB count_distinct_18-3.0.2-1PIGSTY.el10.x86_64.rpm PIGSTY · 3.0.2 · 16.7KiB count_distinct_18-3.0.2-1PGDG.rhel10.x86_64.rpm PGDG · 3.0.2 · 23.3KiB	PGDG 3.0.2 el10.x86_64.pg17 : count_distinct_17 count_distinct_17-3.0.2-3PGDG.rhel10.2.x86_64.rpm PGDG · 3.0.2 · 23.0KiB count_distinct_17-3.0.2-1PIGSTY.el10.x86_64.rpm PIGSTY · 3.0.2 · 16.7KiB count_distinct_17-3.0.2-1PGDG.rhel10.x86_64.rpm PGDG · 3.0.2 · 23.3KiB	PGDG 3.0.2 el10.x86_64.pg16 : count_distinct_16 count_distinct_16-3.0.2-3PGDG.rhel10.2.x86_64.rpm PGDG · 3.0.2 · 23.0KiB count_distinct_16-3.0.2-1PIGSTY.el10.x86_64.rpm PIGSTY · 3.0.2 · 16.7KiB count_distinct_16-3.0.2-1PGDG.rhel10.x86_64.rpm PGDG · 3.0.2 · 23.3KiB	PGDG 3.0.2 el10.x86_64.pg15 : count_distinct_15 count_distinct_15-3.0.2-3PGDG.rhel10.2.x86_64.rpm PGDG · 3.0.2 · 22.9KiB count_distinct_15-3.0.2-1PIGSTY.el10.x86_64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_15-3.0.2-1PGDG.rhel10.x86_64.rpm PGDG · 3.0.2 · 23.2KiB	PGDG 3.0.2 el10.x86_64.pg14 : count_distinct_14 count_distinct_14-3.0.2-3PGDG.rhel10.2.x86_64.rpm PGDG · 3.0.2 · 22.9KiB count_distinct_14-3.0.2-1PIGSTY.el10.x86_64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_14-3.0.2-1PGDG.rhel10.x86_64.rpm PGDG · 3.0.2 · 23.2KiB
el10.aarch64	PGDG 3.0.2 el10.aarch64.pg18 : count_distinct_18 count_distinct_18-3.0.2-3PGDG.rhel10.2.aarch64.rpm PGDG · 3.0.2 · 22.7KiB count_distinct_18-3.0.2-1PIGSTY.el10.aarch64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_18-3.0.2-1PGDG.rhel10.aarch64.rpm PGDG · 3.0.2 · 22.9KiB	PGDG 3.0.2 el10.aarch64.pg17 : count_distinct_17 count_distinct_17-3.0.2-3PGDG.rhel10.2.aarch64.rpm PGDG · 3.0.2 · 22.7KiB count_distinct_17-3.0.2-1PIGSTY.el10.aarch64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_17-3.0.2-1PGDG.rhel10.aarch64.rpm PGDG · 3.0.2 · 22.9KiB	PGDG 3.0.2 el10.aarch64.pg16 : count_distinct_16 count_distinct_16-3.0.2-3PGDG.rhel10.2.aarch64.rpm PGDG · 3.0.2 · 22.7KiB count_distinct_16-3.0.2-1PIGSTY.el10.aarch64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_16-3.0.2-1PGDG.rhel10.aarch64.rpm PGDG · 3.0.2 · 22.9KiB	PGDG 3.0.2 el10.aarch64.pg15 : count_distinct_15 count_distinct_15-3.0.2-3PGDG.rhel10.2.aarch64.rpm PGDG · 3.0.2 · 22.7KiB count_distinct_15-3.0.2-1PIGSTY.el10.aarch64.rpm PIGSTY · 3.0.2 · 16.6KiB count_distinct_15-3.0.2-1PGDG.rhel10.aarch64.rpm PGDG · 3.0.2 · 22.9KiB	PGDG 3.0.2 el10.aarch64.pg14 : count_distinct_14 count_distinct_14-3.0.2-3PGDG.rhel10.2.aarch64.rpm PGDG · 3.0.2 · 22.7KiB count_distinct_14-3.0.2-1PIGSTY.el10.aarch64.rpm PIGSTY · 3.0.2 · 16.5KiB count_distinct_14-3.0.2-1PGDG.rhel10.aarch64.rpm PGDG · 3.0.2 · 22.9KiB
d12.x86_64	PIGSTY 3.0.2 d12.x86_64.pg18 : postgresql-18-count-distinct postgresql-18-count-distinct_3.0.2-1PIGSTY~bookworm_amd64.deb PIGSTY · 3.0.2 · 34.8KiB	PIGSTY 3.0.2 d12.x86_64.pg17 : postgresql-17-count-distinct postgresql-17-count-distinct_3.0.2-1PIGSTY~bookworm_amd64.deb PIGSTY · 3.0.2 · 34.7KiB	PIGSTY 3.0.2 d12.x86_64.pg16 : postgresql-16-count-distinct postgresql-16-count-distinct_3.0.2-1PIGSTY~bookworm_amd64.deb PIGSTY · 3.0.2 · 34.7KiB	PIGSTY 3.0.2 d12.x86_64.pg15 : postgresql-15-count-distinct postgresql-15-count-distinct_3.0.2-1PIGSTY~bookworm_amd64.deb PIGSTY · 3.0.2 · 34.5KiB	PIGSTY 3.0.2 d12.x86_64.pg14 : postgresql-14-count-distinct postgresql-14-count-distinct_3.0.2-1PIGSTY~bookworm_amd64.deb PIGSTY · 3.0.2 · 34.5KiB
d12.aarch64	PIGSTY 3.0.2 d12.aarch64.pg18 : postgresql-18-count-distinct postgresql-18-count-distinct_3.0.2-1PIGSTY~bookworm_arm64.deb PIGSTY · 3.0.2 · 34.6KiB	PIGSTY 3.0.2 d12.aarch64.pg17 : postgresql-17-count-distinct postgresql-17-count-distinct_3.0.2-1PIGSTY~bookworm_arm64.deb PIGSTY · 3.0.2 · 34.5KiB	PIGSTY 3.0.2 d12.aarch64.pg16 : postgresql-16-count-distinct postgresql-16-count-distinct_3.0.2-1PIGSTY~bookworm_arm64.deb PIGSTY · 3.0.2 · 34.5KiB	PIGSTY 3.0.2 d12.aarch64.pg15 : postgresql-15-count-distinct postgresql-15-count-distinct_3.0.2-1PIGSTY~bookworm_arm64.deb PIGSTY · 3.0.2 · 34.2KiB	PIGSTY 3.0.2 d12.aarch64.pg14 : postgresql-14-count-distinct postgresql-14-count-distinct_3.0.2-1PIGSTY~bookworm_arm64.deb PIGSTY · 3.0.2 · 34.2KiB
d13.x86_64	PIGSTY 3.0.2 d13.x86_64.pg18 : postgresql-18-count-distinct postgresql-18-count-distinct_3.0.2-1PIGSTY~trixie_amd64.deb PIGSTY · 3.0.2 · 34.8KiB	PIGSTY 3.0.2 d13.x86_64.pg17 : postgresql-17-count-distinct postgresql-17-count-distinct_3.0.2-1PIGSTY~trixie_amd64.deb PIGSTY · 3.0.2 · 34.7KiB	PIGSTY 3.0.2 d13.x86_64.pg16 : postgresql-16-count-distinct postgresql-16-count-distinct_3.0.2-1PIGSTY~trixie_amd64.deb PIGSTY · 3.0.2 · 34.7KiB	PIGSTY 3.0.2 d13.x86_64.pg15 : postgresql-15-count-distinct postgresql-15-count-distinct_3.0.2-1PIGSTY~trixie_amd64.deb PIGSTY · 3.0.2 · 34.5KiB	PIGSTY 3.0.2 d13.x86_64.pg14 : postgresql-14-count-distinct postgresql-14-count-distinct_3.0.2-1PIGSTY~trixie_amd64.deb PIGSTY · 3.0.2 · 34.5KiB
d13.aarch64	PIGSTY 3.0.2 d13.aarch64.pg18 : postgresql-18-count-distinct postgresql-18-count-distinct_3.0.2-1PIGSTY~trixie_arm64.deb PIGSTY · 3.0.2 · 34.6KiB	PIGSTY 3.0.2 d13.aarch64.pg17 : postgresql-17-count-distinct postgresql-17-count-distinct_3.0.2-1PIGSTY~trixie_arm64.deb PIGSTY · 3.0.2 · 34.5KiB	PIGSTY 3.0.2 d13.aarch64.pg16 : postgresql-16-count-distinct postgresql-16-count-distinct_3.0.2-1PIGSTY~trixie_arm64.deb PIGSTY · 3.0.2 · 34.5KiB	PIGSTY 3.0.2 d13.aarch64.pg15 : postgresql-15-count-distinct postgresql-15-count-distinct_3.0.2-1PIGSTY~trixie_arm64.deb PIGSTY · 3.0.2 · 34.3KiB	PIGSTY 3.0.2 d13.aarch64.pg14 : postgresql-14-count-distinct postgresql-14-count-distinct_3.0.2-1PIGSTY~trixie_arm64.deb PIGSTY · 3.0.2 · 34.3KiB
u22.x86_64	PIGSTY 3.0.2 u22.x86_64.pg18 : postgresql-18-count-distinct postgresql-18-count-distinct_3.0.2-1PIGSTY~jammy_amd64.deb PIGSTY · 3.0.2 · 36.4KiB	PIGSTY 3.0.2 u22.x86_64.pg17 : postgresql-17-count-distinct postgresql-17-count-distinct_3.0.2-1PIGSTY~jammy_amd64.deb PIGSTY · 3.0.2 · 37.4KiB	PIGSTY 3.0.2 u22.x86_64.pg16 : postgresql-16-count-distinct postgresql-16-count-distinct_3.0.2-1PIGSTY~jammy_amd64.deb PIGSTY · 3.0.2 · 37.4KiB	PIGSTY 3.0.2 u22.x86_64.pg15 : postgresql-15-count-distinct postgresql-15-count-distinct_3.0.2-1PIGSTY~jammy_amd64.deb PIGSTY · 3.0.2 · 37.1KiB	PIGSTY 3.0.2 u22.x86_64.pg14 : postgresql-14-count-distinct postgresql-14-count-distinct_3.0.2-1PIGSTY~jammy_amd64.deb PIGSTY · 3.0.2 · 37.0KiB
u22.aarch64	PIGSTY 3.0.2 u22.aarch64.pg18 : postgresql-18-count-distinct postgresql-18-count-distinct_3.0.2-1PIGSTY~jammy_arm64.deb PIGSTY · 3.0.2 · 36.4KiB	PIGSTY 3.0.2 u22.aarch64.pg17 : postgresql-17-count-distinct postgresql-17-count-distinct_3.0.2-1PIGSTY~jammy_arm64.deb PIGSTY · 3.0.2 · 37.3KiB	PIGSTY 3.0.2 u22.aarch64.pg16 : postgresql-16-count-distinct postgresql-16-count-distinct_3.0.2-1PIGSTY~jammy_arm64.deb PIGSTY · 3.0.2 · 37.3KiB	PIGSTY 3.0.2 u22.aarch64.pg15 : postgresql-15-count-distinct postgresql-15-count-distinct_3.0.2-1PIGSTY~jammy_arm64.deb PIGSTY · 3.0.2 · 37.1KiB	PIGSTY 3.0.2 u22.aarch64.pg14 : postgresql-14-count-distinct postgresql-14-count-distinct_3.0.2-1PIGSTY~jammy_arm64.deb PIGSTY · 3.0.2 · 37.0KiB
u24.x86_64	PIGSTY 3.0.2 u24.x86_64.pg18 : postgresql-18-count-distinct postgresql-18-count-distinct_3.0.2-1PIGSTY~noble_amd64.deb PIGSTY · 3.0.2 · 35.8KiB	PIGSTY 3.0.2 u24.x86_64.pg17 : postgresql-17-count-distinct postgresql-17-count-distinct_3.0.2-1PIGSTY~noble_amd64.deb PIGSTY · 3.0.2 · 35.7KiB	PIGSTY 3.0.2 u24.x86_64.pg16 : postgresql-16-count-distinct postgresql-16-count-distinct_3.0.2-1PIGSTY~noble_amd64.deb PIGSTY · 3.0.2 · 35.7KiB	PIGSTY 3.0.2 u24.x86_64.pg15 : postgresql-15-count-distinct postgresql-15-count-distinct_3.0.2-1PIGSTY~noble_amd64.deb PIGSTY · 3.0.2 · 35.5KiB	PIGSTY 3.0.2 u24.x86_64.pg14 : postgresql-14-count-distinct postgresql-14-count-distinct_3.0.2-1PIGSTY~noble_amd64.deb PIGSTY · 3.0.2 · 35.4KiB
u24.aarch64	PIGSTY 3.0.2 u24.aarch64.pg18 : postgresql-18-count-distinct postgresql-18-count-distinct_3.0.2-1PIGSTY~noble_arm64.deb PIGSTY · 3.0.2 · 35.7KiB	PIGSTY 3.0.2 u24.aarch64.pg17 : postgresql-17-count-distinct postgresql-17-count-distinct_3.0.2-1PIGSTY~noble_arm64.deb PIGSTY · 3.0.2 · 35.6KiB	PIGSTY 3.0.2 u24.aarch64.pg16 : postgresql-16-count-distinct postgresql-16-count-distinct_3.0.2-1PIGSTY~noble_arm64.deb PIGSTY · 3.0.2 · 35.6KiB	PIGSTY 3.0.2 u24.aarch64.pg15 : postgresql-15-count-distinct postgresql-15-count-distinct_3.0.2-1PIGSTY~noble_arm64.deb PIGSTY · 3.0.2 · 35.4KiB	PIGSTY 3.0.2 u24.aarch64.pg14 : postgresql-14-count-distinct postgresql-14-count-distinct_3.0.2-1PIGSTY~noble_arm64.deb PIGSTY · 3.0.2 · 35.4KiB
u26.x86_64	PIGSTY 3.0.2 u26.x86_64.pg18 : postgresql-18-count-distinct postgresql-18-count-distinct_3.0.2-1PIGSTY~resolute_amd64.deb PIGSTY · 3.0.2 · 35.4KiB	PIGSTY 3.0.2 u26.x86_64.pg17 : postgresql-17-count-distinct postgresql-17-count-distinct_3.0.2-1PIGSTY~resolute_amd64.deb PIGSTY · 3.0.2 · 35.4KiB	PIGSTY 3.0.2 u26.x86_64.pg16 : postgresql-16-count-distinct postgresql-16-count-distinct_3.0.2-1PIGSTY~resolute_amd64.deb PIGSTY · 3.0.2 · 35.4KiB	PIGSTY 3.0.2 u26.x86_64.pg15 : postgresql-15-count-distinct postgresql-15-count-distinct_3.0.2-1PIGSTY~resolute_amd64.deb PIGSTY · 3.0.2 · 35.2KiB	PIGSTY 3.0.2 u26.x86_64.pg14 : postgresql-14-count-distinct postgresql-14-count-distinct_3.0.2-1PIGSTY~resolute_amd64.deb PIGSTY · 3.0.2 · 35.1KiB
u26.aarch64	PIGSTY 3.0.2 u26.aarch64.pg18 : postgresql-18-count-distinct postgresql-18-count-distinct_3.0.2-1PIGSTY~resolute_arm64.deb PIGSTY · 3.0.2 · 35.7KiB	PIGSTY 3.0.2 u26.aarch64.pg17 : postgresql-17-count-distinct postgresql-17-count-distinct_3.0.2-1PIGSTY~resolute_arm64.deb PIGSTY · 3.0.2 · 35.6KiB	PIGSTY 3.0.2 u26.aarch64.pg16 : postgresql-16-count-distinct postgresql-16-count-distinct_3.0.2-1PIGSTY~resolute_arm64.deb PIGSTY · 3.0.2 · 35.6KiB	PIGSTY 3.0.2 u26.aarch64.pg15 : postgresql-15-count-distinct postgresql-15-count-distinct_3.0.2-1PIGSTY~resolute_arm64.deb PIGSTY · 3.0.2 · 35.4KiB	PIGSTY 3.0.2 u26.aarch64.pg14 : postgresql-14-count-distinct postgresql-14-count-distinct_3.0.2-1PIGSTY~resolute_arm64.deb PIGSTY · 3.0.2 · 35.3KiB

Build

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

pig build pkg count_distinct         # build RPM / DEB packages

Install

You can install count_distinct 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 count_distinct;          # Install for current active PG version

pig

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

dnf

dnf install -y count_distinct_18       # PG 18
dnf install -y count_distinct_17       # PG 17
dnf install -y count_distinct_16       # PG 16
dnf install -y count_distinct_15       # PG 15
dnf install -y count_distinct_14       # PG 14

apt

apt install -y postgresql-18-count-distinct   # PG 18
apt install -y postgresql-17-count-distinct   # PG 17
apt install -y postgresql-16-count-distinct   # PG 16
apt install -y postgresql-15-count-distinct   # PG 15
apt install -y postgresql-14-count-distinct   # PG 14

Create Extension:

CREATE EXTENSION count_distinct;

Usage

count_distinct: alternative to COUNT(DISTINCT …) with better performance

Provides an alternative to COUNT(DISTINCT ...) that avoids sorting and supports parallel aggregation.

CREATE EXTENSION count_distinct;

Functions

Function	Description
`count_distinct(value anyelement)`	Count distinct values (alternative to `COUNT(DISTINCT ...)`)
`array_agg_distinct(value anyelement)`	Aggregate distinct values into an array
`count_distinct_elements(value anyarray)`	Count distinct elements within input arrays
`array_agg_distinct_elements(value anyarray)`	Aggregate distinct elements from input arrays

Examples

CREATE TABLE test_table (id INT, val INT);
INSERT INTO test_table
SELECT mod(i, 1000), (1000 * random())::int
FROM generate_series(1, 10000000) s(i);

-- Instead of:  SELECT id, COUNT(DISTINCT val) FROM test_table GROUP BY 1;
-- Use:
SELECT id, count_distinct(val) FROM test_table GROUP BY 1;

-- Aggregate distinct values into an array
SELECT id, array_agg_distinct(val) FROM test_table GROUP BY 1;

-- Count distinct elements across arrays
SELECT count_distinct_elements(ARRAY[1, 2, 2, 3]);

count_distinct

Overview

Version

Build

Install

Usage

Functions

Examples

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