quantile
quantile
quantile : Quantile aggregation function
Overview
| ID | Extension | Package | Version | Category | License | Language |
|---|---|---|---|---|---|---|
| 4610 | quantile | quantile | 1.1.8 | FUNC | BSD 2-Clause | C |
| Attribute | Has Binary | Has Library | Need Load | Has DDL | Relocatable | Trusted |
|---|---|---|---|---|---|---|
--s-d-- | No | Yes | No | Yes | no | no |
| Relationships | |
|---|---|
| See Also | lower_quantile topn ddsketch omnisketch count_distinct first_last_agg aggs_for_arrays |
Packages
| Type | Repo | Version | PG Major Compatibility | Package Pattern | Dependencies |
|---|---|---|---|---|---|
| EXT | PIGSTY | 1.1.8 | 18 17 16 15 14 | quantile | - |
| RPM | PIGSTY | 1.1.8 | 18 17 16 15 14 | quantile_$v | - |
| DEB | PIGSTY | 1.1.8 | 18 17 16 15 14 | postgresql-$v-quantile | - |
| Linux / PG | PG18 | PG17 | PG16 | PG15 | PG14 |
|---|---|---|---|---|---|
el8.x86_64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
el8.aarch64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
el9.x86_64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
el9.aarch64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
el10.x86_64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
el10.aarch64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
d12.x86_64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
d12.aarch64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
d13.x86_64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
d13.aarch64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
u22.x86_64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
u22.aarch64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
u24.x86_64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
u24.aarch64 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 | PIGSTY 1.1.8 |
Source
pig build pkg quantile; # build rpm/debInstall
Make sure PGDG and PIGSTY repo available:
pig repo add pgsql -u # add both repo and update cacheInstall this extension with pig:
pig install quantile; # install via package name, for the active PG version
pig install quantile -v 18; # install for PG 18
pig install quantile -v 17; # install for PG 17
pig install quantile -v 16; # install for PG 16
pig install quantile -v 15; # install for PG 15
pig install quantile -v 14; # install for PG 14Create this extension with:
CREATE EXTENSION quantile;Usage
Provides aggregate functions to compute quantiles. Overloaded for int, bigint, double precision, and numeric.
CREATE EXTENSION quantile;Functions
| Function | Description |
|---|---|
quantile(value, quantile float) | Compute a single quantile (0 to 1) |
quantile(value, quantiles float[]) | Compute multiple quantiles at once, returns array |
Examples
-- Compute the median (0.5 quantile)
SELECT quantile(i, 0.5) FROM generate_series(1, 1000) s(i);
-- 500
-- Compute the 95th percentile
SELECT quantile(i, 0.95) FROM generate_series(1, 1000) s(i);
-- Compute all quartiles at once (more efficient than separate calls)
SELECT quantile(i, ARRAY[0.25, 0.5, 0.75])
FROM generate_series(1, 1000) s(i);
-- {250, 500, 750}Note: Since PostgreSQL 9.4, built-in percentile_cont and percentile_disc functions are available. Consider using those first and only use this extension if it provides measurably better performance for your workload.
Last updated on