liuyu/pgvector
1
0
Fork 0
mirror of https://github.com/pgvector/pgvector.git synced 2026-06-06 14:01:31 +08:00
Code Issues Packages Projects Releases Wiki Activity

Added avg aggregate for vector - closes #51

Browse Source
This commit is contained in:
Andrew Kane
2022-12-30 17:22:25 -08:00
parent b400ac0f36
commit e09f93cba7
7 changed files with 272 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
sql/vector.sql
View File

@@ -84,6 +84,26 @@ CREATE FUNCTION vector_negative_inner_product(vector, vector) RETURNS float8
CREATE FUNCTION vector_spherical_distance(vector, vector) RETURNS float8
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE FUNCTION vector_accum(double precision[], vector) RETURNS double precision[]
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE FUNCTION vector_avg(double precision[]) RETURNS vector
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE FUNCTION vector_combine(double precision[], double precision[]) RETURNS double precision[]
AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
-- aggregates
CREATE AGGREGATE avg(vector) (
SFUNC = vector_accum,
STYPE = double precision[],
FINALFUNC = vector_avg,
COMBINEFUNC = vector_combine,
INITCOND = '{0}',
PARALLEL = SAFE
);
-- cast functions
CREATE FUNCTION vector(vector, integer, boolean) RETURNS vector