aggs_for_vecs
aggs_for_vecs
aggs_for_vecs : Aggregate functions for array inputs
Overview
| ID | Extension | Package | Version | Category | License | Language |
|---|---|---|---|---|---|---|
| 4740 | aggs_for_vecs | aggs_for_vecs | 1.4.1 | FUNC | MIT | C |
| Attribute | Has Binary | Has Library | Need Load | Has DDL | Relocatable | Trusted |
|---|---|---|---|---|---|---|
--s-d-r | No | Yes | No | Yes | yes | no |
| Relationships | |
|---|---|
| See Also | aggs_for_arrays first_last_agg arraymath floatvec vector topn |
Packages
| Type | Repo | Version | PG Major Compatibility | Package Pattern | Dependencies |
|---|---|---|---|---|---|
| EXT | PIGSTY | 1.4.1 | 18 17 16 15 14 | aggs_for_vecs | - |
| RPM | PIGSTY | 1.4.1 | 18 17 16 15 14 | aggs_for_vecs_$v | - |
| DEB | PIGSTY | 1.4.1 | 18 17 16 15 14 | postgresql-$v-aggs-for-vecs | - |
| Linux / PG | PG18 | PG17 | PG16 | PG15 | PG14 |
|---|---|---|---|---|---|
el8.x86_64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
el8.aarch64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
el9.x86_64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
el9.aarch64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
el10.x86_64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
el10.aarch64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
d12.x86_64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
d12.aarch64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
d13.x86_64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
d13.aarch64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
u22.x86_64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
u22.aarch64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
u24.x86_64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
u24.aarch64 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 | PIGSTY 1.4.1 |
Source
pig build pkg aggs_for_vecs; # 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 aggs_for_vecs; # install via package name, for the active PG version
pig install aggs_for_vecs -v 18; # install for PG 18
pig install aggs_for_vecs -v 17; # install for PG 17
pig install aggs_for_vecs -v 16; # install for PG 16
pig install aggs_for_vecs -v 15; # install for PG 15
pig install aggs_for_vecs -v 14; # install for PG 14Create this extension with:
CREATE EXTENSION aggs_for_vecs;Usage
aggs_for_vecs: aggregate functions for arrays (vector/row-based)
Provides aggregate functions that operate on arrays as vectors, computing position-wise statistics across multiple rows. Supports SMALLINT, INTEGER, BIGINT, REAL, and DOUBLE PRECISION.
CREATE EXTENSION aggs_for_vecs;Aggregate Functions
| Function | Description |
|---|---|
vec_to_count(anyarray) | Count of non-nulls in each position |
vec_to_sum(anyarray) | Sum in each position |
vec_to_min(anyarray) | Minimum in each position |
vec_to_max(anyarray) | Maximum in each position |
vec_to_mean(anyarray) | Average in each position (returns FLOAT[]) |
vec_to_weighted_mean(values, weights) | Weighted average in each position |
vec_to_var_samp(anyarray) | Sample variance in each position |
vec_to_first(anyarray) | First non-null in each position (use with ORDER BY) |
vec_to_last(anyarray) | Last non-null in each position (use with ORDER BY) |
hist_2d(x, y, ...) | 2-D histogram |
hist_md(vals, indexes, ...) | N-dimensional histogram |
Non-Aggregate Functions
| Function | Description |
|---|---|
vec_add(l, r) | Element-wise addition |
vec_sub(l, r) | Element-wise subtraction |
vec_mul(l, r) | Element-wise multiplication |
vec_div(l, r) | Element-wise division |
vec_elements(array, indexes) | Select elements at given indexes |
pad_vec(array, length) | Extend array to given length with NULLs |
vec_coalesce(array, default) | Replace NULLs with default |
vec_trim_scale(numeric[]) | Trim trailing zeros from NUMERIC elements |
vec_without_outliers(vals, mins, maxs) | Replace outliers with NULL |
Examples
-- Position-wise minimum across rows
SELECT vec_to_min(vals) FROM (VALUES
(ARRAY[1,2,3,4]),
(ARRAY[5,0,-5,0]),
(ARRAY[3,6,0,9])
) AS t(vals);
-- {1,0,-5,0}
-- Position-wise average
SELECT vec_to_mean(vals) FROM my_table;Last updated on