count_distinct

Overview

MIXED 3rd Party Extension: count_distinct : An alternative to COUNT(DISTINCT …) aggregate, usable with HashAggregate

Information

• Extension ID: 4630
• Extension Name: count_distinct
• Package Name: count_distinct
• Category: FUNC
• License: BSD 2
• Website: https://github.com/tvondra/count_distinct
• Language: C
• Extra Tags: pgdg-flaw
• Comment:

Metadata

• Latest Version: 3.0.2
• Postgres Support: 17,16,15,14,13
• Need Load: Shared library do not need explicit loading
• Need DDL: Need CREATE EXTENSION DDL
• Relocatable: Can not install to arbitrary schema
• Trusted: Untrusted, Require Superuser to Create
• Schemas: N/A
• Requires: N/A

RPM / DEB

• RPM Repo: PIGSTY
• RPM Name: count_distinct_$v*
• RPM Ver : 3.0.2
• RPM Deps: N/A
• DEB Repo: PIGSTY
• DEB Name: postgresql-$v-count-distinct
• DEB Ver : 3.0.2
• DEB Deps: N/A

Packages

Installation

Install count_distinct via the pig CLI tool:

pig ext install count_distinct

Install count_distinct via Pigsty playbook:

./pgsql.yml -t pg_extension -e '{"pg_extensions": ["count_distinct"]}' # -l <cls>

Install count_distinct RPM from YUM repo directly:

dnf install count_distinct_17*;
dnf install count_distinct_16*;
dnf install count_distinct_15*;
dnf install count_distinct_14*;
dnf install count_distinct_13*;

Install count_distinct DEB from APT repo directly:

apt install postgresql-17-count-distinct;
apt install postgresql-16-count-distinct;
apt install postgresql-15-count-distinct;
apt install postgresql-14-count-distinct;
apt install postgresql-13-count-distinct;

Enable count_distinct extension on PostgreSQL cluster：

CREATE EXTENSION count_distinct;