mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-27 02:47:19 +02:00
36 lines
1.0 KiB
SQL
36 lines
1.0 KiB
SQL
/* contrib/intagg/int_aggregate.sql */
|
|
|
|
-- Adjust this setting to control where the objects get created.
|
|
SET search_path = public;
|
|
|
|
-- Internal function for the aggregate
|
|
-- Is called for each item in an aggregation
|
|
CREATE OR REPLACE FUNCTION int_agg_state (internal, int4)
|
|
RETURNS internal
|
|
AS 'array_agg_transfn'
|
|
LANGUAGE INTERNAL;
|
|
|
|
-- Internal function for the aggregate
|
|
-- Is called at the end of the aggregation, and returns an array.
|
|
CREATE OR REPLACE FUNCTION int_agg_final_array (internal)
|
|
RETURNS int4[]
|
|
AS 'array_agg_finalfn'
|
|
LANGUAGE INTERNAL;
|
|
|
|
-- The aggregate function itself
|
|
-- uses the above functions to create an array of integers from an aggregation.
|
|
CREATE AGGREGATE int_array_aggregate (
|
|
BASETYPE = int4,
|
|
SFUNC = int_agg_state,
|
|
STYPE = internal,
|
|
FINALFUNC = int_agg_final_array
|
|
);
|
|
|
|
-- The enumeration function
|
|
-- returns each element in a one dimensional integer array
|
|
-- as a row.
|
|
CREATE OR REPLACE FUNCTION int_array_enum(int4[])
|
|
RETURNS setof integer
|
|
AS 'array_unnest'
|
|
LANGUAGE INTERNAL IMMUTABLE STRICT;
|