lower_quantile

Lower quantile aggregate function

Overview

Package	Version	Category	License	Language
`lower_quantile`	`1.0.3`	FUNC	BSD-2-Clause	C

ID	Extension	Bin	Lib	Load	Create	Trust	Reloc	Schema
4620	`lower_quantile`	No	Yes	No	Yes	No	No	-

Related	`ddsketch` `tdigest` `weighted_statistics` `quantile` `topn` `count_distinct` `omnisketch` `datasketches` `hll`

Version

Type	Repo	Version	PG Ver	Package	Deps
EXT	PIGSTY	`1.0.3`	1817161514	`lower_quantile`	-
RPM	PIGSTY	`1.0.3`	1817161514	`lower_quantile_$v`	-
DEB	PIGSTY	`1.0.3`	1817161514	`postgresql-$v-lower-quantile`	-

OS / PG	PG18	PG17	PG16	PG15	PG14
el8.x86_64	PIGSTY 1.0.3 el8.x86_64.pg18 : lower_quantile_18 lower_quantile_18-1.0.3-1PIGSTY.el8.x86_64.rpm PIGSTY · 1.0.3 · 15.5KiB	PIGSTY 1.0.3 el8.x86_64.pg17 : lower_quantile_17 lower_quantile_17-1.0.3-1PIGSTY.el8.x86_64.rpm PIGSTY · 1.0.3 · 15.6KiB	PIGSTY 1.0.3 el8.x86_64.pg16 : lower_quantile_16 lower_quantile_16-1.0.3-1PIGSTY.el8.x86_64.rpm PIGSTY · 1.0.3 · 15.6KiB	PIGSTY 1.0.3 el8.x86_64.pg15 : lower_quantile_15 lower_quantile_15-1.0.3-1PIGSTY.el8.x86_64.rpm PIGSTY · 1.0.3 · 15.6KiB	PIGSTY 1.0.3 el8.x86_64.pg14 : lower_quantile_14 lower_quantile_14-1.0.3-1PIGSTY.el8.x86_64.rpm PIGSTY · 1.0.3 · 15.5KiB
el8.aarch64	PIGSTY 1.0.3 el8.aarch64.pg18 : lower_quantile_18 lower_quantile_18-1.0.3-1PIGSTY.el8.aarch64.rpm PIGSTY · 1.0.3 · 15.4KiB	PIGSTY 1.0.3 el8.aarch64.pg17 : lower_quantile_17 lower_quantile_17-1.0.3-1PIGSTY.el8.aarch64.rpm PIGSTY · 1.0.3 · 15.4KiB	PIGSTY 1.0.3 el8.aarch64.pg16 : lower_quantile_16 lower_quantile_16-1.0.3-1PIGSTY.el8.aarch64.rpm PIGSTY · 1.0.3 · 15.4KiB	PIGSTY 1.0.3 el8.aarch64.pg15 : lower_quantile_15 lower_quantile_15-1.0.3-1PIGSTY.el8.aarch64.rpm PIGSTY · 1.0.3 · 15.4KiB	PIGSTY 1.0.3 el8.aarch64.pg14 : lower_quantile_14 lower_quantile_14-1.0.3-1PIGSTY.el8.aarch64.rpm PIGSTY · 1.0.3 · 15.4KiB
el9.x86_64	PIGSTY 1.0.3 el9.x86_64.pg18 : lower_quantile_18 lower_quantile_18-1.0.3-1PIGSTY.el9.x86_64.rpm PIGSTY · 1.0.3 · 15.4KiB	PIGSTY 1.0.3 el9.x86_64.pg17 : lower_quantile_17 lower_quantile_17-1.0.3-1PIGSTY.el9.x86_64.rpm PIGSTY · 1.0.3 · 15.4KiB	PIGSTY 1.0.3 el9.x86_64.pg16 : lower_quantile_16 lower_quantile_16-1.0.3-1PIGSTY.el9.x86_64.rpm PIGSTY · 1.0.3 · 15.4KiB	PIGSTY 1.0.3 el9.x86_64.pg15 : lower_quantile_15 lower_quantile_15-1.0.3-1PIGSTY.el9.x86_64.rpm PIGSTY · 1.0.3 · 15.4KiB	PIGSTY 1.0.3 el9.x86_64.pg14 : lower_quantile_14 lower_quantile_14-1.0.3-1PIGSTY.el9.x86_64.rpm PIGSTY · 1.0.3 · 15.4KiB
el9.aarch64	PIGSTY 1.0.3 el9.aarch64.pg18 : lower_quantile_18 lower_quantile_18-1.0.3-1PIGSTY.el9.aarch64.rpm PIGSTY · 1.0.3 · 15.3KiB	PIGSTY 1.0.3 el9.aarch64.pg17 : lower_quantile_17 lower_quantile_17-1.0.3-1PIGSTY.el9.aarch64.rpm PIGSTY · 1.0.3 · 15.3KiB	PIGSTY 1.0.3 el9.aarch64.pg16 : lower_quantile_16 lower_quantile_16-1.0.3-1PIGSTY.el9.aarch64.rpm PIGSTY · 1.0.3 · 15.3KiB	PIGSTY 1.0.3 el9.aarch64.pg15 : lower_quantile_15 lower_quantile_15-1.0.3-1PIGSTY.el9.aarch64.rpm PIGSTY · 1.0.3 · 15.3KiB	PIGSTY 1.0.3 el9.aarch64.pg14 : lower_quantile_14 lower_quantile_14-1.0.3-1PIGSTY.el9.aarch64.rpm PIGSTY · 1.0.3 · 15.2KiB
el10.x86_64	PIGSTY 1.0.3 el10.x86_64.pg18 : lower_quantile_18 lower_quantile_18-1.0.3-1PIGSTY.el10.x86_64.rpm PIGSTY · 1.0.3 · 15.3KiB	PIGSTY 1.0.3 el10.x86_64.pg17 : lower_quantile_17 lower_quantile_17-1.0.3-1PIGSTY.el10.x86_64.rpm PIGSTY · 1.0.3 · 15.3KiB	PIGSTY 1.0.3 el10.x86_64.pg16 : lower_quantile_16 lower_quantile_16-1.0.3-1PIGSTY.el10.x86_64.rpm PIGSTY · 1.0.3 · 15.3KiB	PIGSTY 1.0.3 el10.x86_64.pg15 : lower_quantile_15 lower_quantile_15-1.0.3-1PIGSTY.el10.x86_64.rpm PIGSTY · 1.0.3 · 15.3KiB	PIGSTY 1.0.3 el10.x86_64.pg14 : lower_quantile_14 lower_quantile_14-1.0.3-1PIGSTY.el10.x86_64.rpm PIGSTY · 1.0.3 · 15.3KiB
el10.aarch64	PIGSTY 1.0.3 el10.aarch64.pg18 : lower_quantile_18 lower_quantile_18-1.0.3-1PIGSTY.el10.aarch64.rpm PIGSTY · 1.0.3 · 15.4KiB	PIGSTY 1.0.3 el10.aarch64.pg17 : lower_quantile_17 lower_quantile_17-1.0.3-1PIGSTY.el10.aarch64.rpm PIGSTY · 1.0.3 · 15.3KiB	PIGSTY 1.0.3 el10.aarch64.pg16 : lower_quantile_16 lower_quantile_16-1.0.3-1PIGSTY.el10.aarch64.rpm PIGSTY · 1.0.3 · 15.3KiB	PIGSTY 1.0.3 el10.aarch64.pg15 : lower_quantile_15 lower_quantile_15-1.0.3-1PIGSTY.el10.aarch64.rpm PIGSTY · 1.0.3 · 15.3KiB	PIGSTY 1.0.3 el10.aarch64.pg14 : lower_quantile_14 lower_quantile_14-1.0.3-1PIGSTY.el10.aarch64.rpm PIGSTY · 1.0.3 · 15.3KiB
d12.x86_64	PIGSTY 1.0.3 d12.x86_64.pg18 : postgresql-18-lower-quantile postgresql-18-lower-quantile_1.0.3-1PIGSTY~bookworm_amd64.deb PIGSTY · 1.0.3 · 16.4KiB	PIGSTY 1.0.3 d12.x86_64.pg17 : postgresql-17-lower-quantile postgresql-17-lower-quantile_1.0.3-1PIGSTY~bookworm_amd64.deb PIGSTY · 1.0.3 · 16.8KiB	PIGSTY 1.0.3 d12.x86_64.pg16 : postgresql-16-lower-quantile postgresql-16-lower-quantile_1.0.3-1PIGSTY~bookworm_amd64.deb PIGSTY · 1.0.3 · 16.4KiB	PIGSTY 1.0.3 d12.x86_64.pg15 : postgresql-15-lower-quantile postgresql-15-lower-quantile_1.0.3-1PIGSTY~bookworm_amd64.deb PIGSTY · 1.0.3 · 16.4KiB	PIGSTY 1.0.3 d12.x86_64.pg14 : postgresql-14-lower-quantile postgresql-14-lower-quantile_1.0.3-1PIGSTY~bookworm_amd64.deb PIGSTY · 1.0.3 · 16.4KiB
d12.aarch64	PIGSTY 1.0.3 d12.aarch64.pg18 : postgresql-18-lower-quantile postgresql-18-lower-quantile_1.0.3-1PIGSTY~bookworm_arm64.deb PIGSTY · 1.0.3 · 16.2KiB	PIGSTY 1.0.3 d12.aarch64.pg17 : postgresql-17-lower-quantile postgresql-17-lower-quantile_1.0.3-1PIGSTY~bookworm_arm64.deb PIGSTY · 1.0.3 · 16.6KiB	PIGSTY 1.0.3 d12.aarch64.pg16 : postgresql-16-lower-quantile postgresql-16-lower-quantile_1.0.3-1PIGSTY~bookworm_arm64.deb PIGSTY · 1.0.3 · 16.2KiB	PIGSTY 1.0.3 d12.aarch64.pg15 : postgresql-15-lower-quantile postgresql-15-lower-quantile_1.0.3-1PIGSTY~bookworm_arm64.deb PIGSTY · 1.0.3 · 16.2KiB	PIGSTY 1.0.3 d12.aarch64.pg14 : postgresql-14-lower-quantile postgresql-14-lower-quantile_1.0.3-1PIGSTY~bookworm_arm64.deb PIGSTY · 1.0.3 · 16.2KiB
d13.x86_64	PIGSTY 1.0.3 d13.x86_64.pg18 : postgresql-18-lower-quantile postgresql-18-lower-quantile_1.0.3-1PIGSTY~trixie_amd64.deb PIGSTY · 1.0.3 · 16.4KiB	PIGSTY 1.0.3 d13.x86_64.pg17 : postgresql-17-lower-quantile postgresql-17-lower-quantile_1.0.3-1PIGSTY~trixie_amd64.deb PIGSTY · 1.0.3 · 16.8KiB	PIGSTY 1.0.3 d13.x86_64.pg16 : postgresql-16-lower-quantile postgresql-16-lower-quantile_1.0.3-1PIGSTY~trixie_amd64.deb PIGSTY · 1.0.3 · 16.4KiB	PIGSTY 1.0.3 d13.x86_64.pg15 : postgresql-15-lower-quantile postgresql-15-lower-quantile_1.0.3-1PIGSTY~trixie_amd64.deb PIGSTY · 1.0.3 · 16.4KiB	PIGSTY 1.0.3 d13.x86_64.pg14 : postgresql-14-lower-quantile postgresql-14-lower-quantile_1.0.3-1PIGSTY~trixie_amd64.deb PIGSTY · 1.0.3 · 16.4KiB
d13.aarch64	PIGSTY 1.0.3 d13.aarch64.pg18 : postgresql-18-lower-quantile postgresql-18-lower-quantile_1.0.3-1PIGSTY~trixie_arm64.deb PIGSTY · 1.0.3 · 16.2KiB	PIGSTY 1.0.3 d13.aarch64.pg17 : postgresql-17-lower-quantile postgresql-17-lower-quantile_1.0.3-1PIGSTY~trixie_arm64.deb PIGSTY · 1.0.3 · 16.6KiB	PIGSTY 1.0.3 d13.aarch64.pg16 : postgresql-16-lower-quantile postgresql-16-lower-quantile_1.0.3-1PIGSTY~trixie_arm64.deb PIGSTY · 1.0.3 · 16.2KiB	PIGSTY 1.0.3 d13.aarch64.pg15 : postgresql-15-lower-quantile postgresql-15-lower-quantile_1.0.3-1PIGSTY~trixie_arm64.deb PIGSTY · 1.0.3 · 16.2KiB	PIGSTY 1.0.3 d13.aarch64.pg14 : postgresql-14-lower-quantile postgresql-14-lower-quantile_1.0.3-1PIGSTY~trixie_arm64.deb PIGSTY · 1.0.3 · 16.2KiB
u22.x86_64	PIGSTY 1.0.3 u22.x86_64.pg18 : postgresql-18-lower-quantile postgresql-18-lower-quantile_1.0.3-1PIGSTY~jammy_amd64.deb PIGSTY · 1.0.3 · 16.7KiB	PIGSTY 1.0.3 u22.x86_64.pg17 : postgresql-17-lower-quantile postgresql-17-lower-quantile_1.0.3-1PIGSTY~jammy_amd64.deb PIGSTY · 1.0.3 · 17.7KiB	PIGSTY 1.0.3 u22.x86_64.pg16 : postgresql-16-lower-quantile postgresql-16-lower-quantile_1.0.3-1PIGSTY~jammy_amd64.deb PIGSTY · 1.0.3 · 17.5KiB	PIGSTY 1.0.3 u22.x86_64.pg15 : postgresql-15-lower-quantile postgresql-15-lower-quantile_1.0.3-1PIGSTY~jammy_amd64.deb PIGSTY · 1.0.3 · 17.4KiB	PIGSTY 1.0.3 u22.x86_64.pg14 : postgresql-14-lower-quantile postgresql-14-lower-quantile_1.0.3-1PIGSTY~jammy_amd64.deb PIGSTY · 1.0.3 · 17.4KiB
u22.aarch64	PIGSTY 1.0.3 u22.aarch64.pg18 : postgresql-18-lower-quantile postgresql-18-lower-quantile_1.0.3-1PIGSTY~jammy_arm64.deb PIGSTY · 1.0.3 · 16.3KiB	PIGSTY 1.0.3 u22.aarch64.pg17 : postgresql-17-lower-quantile postgresql-17-lower-quantile_1.0.3-1PIGSTY~jammy_arm64.deb PIGSTY · 1.0.3 · 17.3KiB	PIGSTY 1.0.3 u22.aarch64.pg16 : postgresql-16-lower-quantile postgresql-16-lower-quantile_1.0.3-1PIGSTY~jammy_arm64.deb PIGSTY · 1.0.3 · 17.1KiB	PIGSTY 1.0.3 u22.aarch64.pg15 : postgresql-15-lower-quantile postgresql-15-lower-quantile_1.0.3-1PIGSTY~jammy_arm64.deb PIGSTY · 1.0.3 · 17.0KiB	PIGSTY 1.0.3 u22.aarch64.pg14 : postgresql-14-lower-quantile postgresql-14-lower-quantile_1.0.3-1PIGSTY~jammy_arm64.deb PIGSTY · 1.0.3 · 17.0KiB
u24.x86_64	PIGSTY 1.0.3 u24.x86_64.pg18 : postgresql-18-lower-quantile postgresql-18-lower-quantile_1.0.3-1PIGSTY~noble_amd64.deb PIGSTY · 1.0.3 · 16.9KiB	PIGSTY 1.0.3 u24.x86_64.pg17 : postgresql-17-lower-quantile postgresql-17-lower-quantile_1.0.3-1PIGSTY~noble_amd64.deb PIGSTY · 1.0.3 · 17.2KiB	PIGSTY 1.0.3 u24.x86_64.pg16 : postgresql-16-lower-quantile postgresql-16-lower-quantile_1.0.3-1PIGSTY~noble_amd64.deb PIGSTY · 1.0.3 · 16.9KiB	PIGSTY 1.0.3 u24.x86_64.pg15 : postgresql-15-lower-quantile postgresql-15-lower-quantile_1.0.3-1PIGSTY~noble_amd64.deb PIGSTY · 1.0.3 · 16.9KiB	PIGSTY 1.0.3 u24.x86_64.pg14 : postgresql-14-lower-quantile postgresql-14-lower-quantile_1.0.3-1PIGSTY~noble_amd64.deb PIGSTY · 1.0.3 · 16.8KiB
u24.aarch64	PIGSTY 1.0.3 u24.aarch64.pg18 : postgresql-18-lower-quantile postgresql-18-lower-quantile_1.0.3-1PIGSTY~noble_arm64.deb PIGSTY · 1.0.3 · 16.5KiB	PIGSTY 1.0.3 u24.aarch64.pg17 : postgresql-17-lower-quantile postgresql-17-lower-quantile_1.0.3-1PIGSTY~noble_arm64.deb PIGSTY · 1.0.3 · 16.9KiB	PIGSTY 1.0.3 u24.aarch64.pg16 : postgresql-16-lower-quantile postgresql-16-lower-quantile_1.0.3-1PIGSTY~noble_arm64.deb PIGSTY · 1.0.3 · 16.5KiB	PIGSTY 1.0.3 u24.aarch64.pg15 : postgresql-15-lower-quantile postgresql-15-lower-quantile_1.0.3-1PIGSTY~noble_arm64.deb PIGSTY · 1.0.3 · 16.5KiB	PIGSTY 1.0.3 u24.aarch64.pg14 : postgresql-14-lower-quantile postgresql-14-lower-quantile_1.0.3-1PIGSTY~noble_arm64.deb PIGSTY · 1.0.3 · 16.5KiB
u26.x86_64	PIGSTY 1.0.3 u26.x86_64.pg18 : postgresql-18-lower-quantile postgresql-18-lower-quantile_1.0.3-1PIGSTY~resolute_amd64.deb PIGSTY · 1.0.3 · 16.8KiB	PIGSTY 1.0.3 u26.x86_64.pg17 : postgresql-17-lower-quantile postgresql-17-lower-quantile_1.0.3-1PIGSTY~resolute_amd64.deb PIGSTY · 1.0.3 · 17.3KiB	PIGSTY 1.0.3 u26.x86_64.pg16 : postgresql-16-lower-quantile postgresql-16-lower-quantile_1.0.3-1PIGSTY~resolute_amd64.deb PIGSTY · 1.0.3 · 16.9KiB	PIGSTY 1.0.3 u26.x86_64.pg15 : postgresql-15-lower-quantile postgresql-15-lower-quantile_1.0.3-1PIGSTY~resolute_amd64.deb PIGSTY · 1.0.3 · 16.9KiB	PIGSTY 1.0.3 u26.x86_64.pg14 : postgresql-14-lower-quantile postgresql-14-lower-quantile_1.0.3-1PIGSTY~resolute_amd64.deb PIGSTY · 1.0.3 · 16.9KiB
u26.aarch64	PIGSTY 1.0.3 u26.aarch64.pg18 : postgresql-18-lower-quantile postgresql-18-lower-quantile_1.0.3-1PIGSTY~resolute_arm64.deb PIGSTY · 1.0.3 · 16.6KiB	PIGSTY 1.0.3 u26.aarch64.pg17 : postgresql-17-lower-quantile postgresql-17-lower-quantile_1.0.3-1PIGSTY~resolute_arm64.deb PIGSTY · 1.0.3 · 17.2KiB	PIGSTY 1.0.3 u26.aarch64.pg16 : postgresql-16-lower-quantile postgresql-16-lower-quantile_1.0.3-1PIGSTY~resolute_arm64.deb PIGSTY · 1.0.3 · 16.7KiB	PIGSTY 1.0.3 u26.aarch64.pg15 : postgresql-15-lower-quantile postgresql-15-lower-quantile_1.0.3-1PIGSTY~resolute_arm64.deb PIGSTY · 1.0.3 · 16.8KiB	PIGSTY 1.0.3 u26.aarch64.pg14 : postgresql-14-lower-quantile postgresql-14-lower-quantile_1.0.3-1PIGSTY~resolute_arm64.deb PIGSTY · 1.0.3 · 16.7KiB

Build

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

pig build pkg lower_quantile         # build RPM / DEB packages

Install

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

pig

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

dnf

dnf install -y lower_quantile_18       # PG 18
dnf install -y lower_quantile_17       # PG 17
dnf install -y lower_quantile_16       # PG 16
dnf install -y lower_quantile_15       # PG 15
dnf install -y lower_quantile_14       # PG 14

apt

apt install -y postgresql-18-lower-quantile   # PG 18
apt install -y postgresql-17-lower-quantile   # PG 17
apt install -y postgresql-16-lower-quantile   # PG 16
apt install -y postgresql-15-lower-quantile   # PG 15
apt install -y postgresql-14-lower-quantile   # PG 14

Create Extension:

CREATE EXTENSION lower_quantile;

Usage

lower_quantile: lower quantile aggregate for PostgreSQL

Implements the “lower quantile” aggregate, which differs slightly from percentile_disc by returning the value whose rank in the sorted multiset is floor(1 + q*(n-1)).

CREATE EXTENSION lower_quantile;

Functions

Function	Description
`lower_quantile(value, quantile float)`	Compute the lower quantile for the given quantile value (0 to 1)

Examples

-- Compute the lower-quantile median
SELECT lower_quantile(i, 0.5)
FROM generate_series(1, 1000) s(i);

-- Compute the 95th lower quantile
SELECT lower_quantile(i, 0.95)
FROM generate_series(1, 1000) s(i);

This definition is used by some papers (e.g., the DDSketch paper) to formulate accuracy guarantees.

lower_quantile

Overview

Version

Build

Install

Usage

Functions

Examples

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