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.
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