database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-08-25 20:23:07 +03:00
Code Activity

Aggregate functions now support multiple input arguments. I also took

Browse Source 
the opportunity to treat COUNT(*) as a zero-argument aggregate instead
of the old hack that equated it to COUNT(1); this is materially cleaner
(no more weird ANYOID cases) and ought to be at least a tiny bit faster.
Original patch by Sergey Koposov; review, documentation, simple regression
tests, pg_dump and psql support by moi.
This commit is contained in:
Tom Lane
2006-07-27 19:52:07 +00:00
parent c2d1138351
commit 108fe47301
39 changed files with 702 additions and 484 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
src/test/regress/sql/polymorphism.sql
View File

@@ -57,6 +57,10 @@ CREATE FUNCTION tf1p(anyarray,int) RETURNS anyarray AS
CREATE FUNCTION tf2p(int[],anyelement) RETURNS int[] AS
'select $1' LANGUAGE SQL;
-- multi-arg polymorphic
CREATE FUNCTION sum3(anyelement,anyelement,anyelement) returns anyelement AS
'select $1+$2+$3' language sql strict;
-- finalfn polymorphic
CREATE FUNCTION ffp(anyarray) RETURNS anyarray AS
'select $1' LANGUAGE SQL;
@@ -78,26 +82,26 @@ CREATE FUNCTION ffnp(int[]) returns int[] as
-- -------
-- N N
-- should CREATE
CREATE AGGREGATE myaggp01a(BASETYPE = "ANY", SFUNC = stfnp, STYPE = int4[],
CREATE AGGREGATE myaggp01a(*) (SFUNC = stfnp, STYPE = int4[],
FINALFUNC = ffp, INITCOND = '{}');
-- P N
-- should ERROR: stfnp(anyarray) not matched by stfnp(int[])
CREATE AGGREGATE myaggp02a(BASETYPE = "ANY", SFUNC = stfnp, STYPE = anyarray,
CREATE AGGREGATE myaggp02a(*) (SFUNC = stfnp, STYPE = anyarray,
FINALFUNC = ffp, INITCOND = '{}');
-- N P
-- should CREATE
CREATE AGGREGATE myaggp03a(BASETYPE = "ANY", SFUNC = stfp, STYPE = int4[],
CREATE AGGREGATE myaggp03a(*) (SFUNC = stfp, STYPE = int4[],
FINALFUNC = ffp, INITCOND = '{}');
CREATE AGGREGATE myaggp03b(BASETYPE = "ANY", SFUNC = stfp, STYPE = int4[],
CREATE AGGREGATE myaggp03b(*) (SFUNC = stfp, STYPE = int4[],
INITCOND = '{}');
-- P P
-- should ERROR: we have no way to resolve S
CREATE AGGREGATE myaggp04a(BASETYPE = "ANY", SFUNC = stfp, STYPE = anyarray,
CREATE AGGREGATE myaggp04a(*) (SFUNC = stfp, STYPE = anyarray,
FINALFUNC = ffp, INITCOND = '{}');
CREATE AGGREGATE myaggp04b(BASETYPE = "ANY", SFUNC = stfp, STYPE = anyarray,
CREATE AGGREGATE myaggp04b(*) (SFUNC = stfp, STYPE = anyarray,
INITCOND = '{}');
@@ -207,26 +211,26 @@ CREATE AGGREGATE myaggp20b(BASETYPE = anyelement, SFUNC = tfp,
-- -------
-- N N
-- should CREATE
CREATE AGGREGATE myaggn01a(BASETYPE = "ANY", SFUNC = stfnp, STYPE = int4[],
CREATE AGGREGATE myaggn01a(*) (SFUNC = stfnp, STYPE = int4[],
FINALFUNC = ffnp, INITCOND = '{}');
CREATE AGGREGATE myaggn01b(BASETYPE = "ANY", SFUNC = stfnp, STYPE = int4[],
CREATE AGGREGATE myaggn01b(*) (SFUNC = stfnp, STYPE = int4[],
INITCOND = '{}');
-- P N
-- should ERROR: stfnp(anyarray) not matched by stfnp(int[])
CREATE AGGREGATE myaggn02a(BASETYPE = "ANY", SFUNC = stfnp, STYPE = anyarray,
CREATE AGGREGATE myaggn02a(*) (SFUNC = stfnp, STYPE = anyarray,
FINALFUNC = ffnp, INITCOND = '{}');
CREATE AGGREGATE myaggn02b(BASETYPE = "ANY", SFUNC = stfnp, STYPE = anyarray,
CREATE AGGREGATE myaggn02b(*) (SFUNC = stfnp, STYPE = anyarray,
INITCOND = '{}');
-- N P
-- should CREATE
CREATE AGGREGATE myaggn03a(BASETYPE = "ANY", SFUNC = stfp, STYPE = int4[],
CREATE AGGREGATE myaggn03a(*) (SFUNC = stfp, STYPE = int4[],
FINALFUNC = ffnp, INITCOND = '{}');
-- P P
-- should ERROR: ffnp(anyarray) not matched by ffnp(int[])
CREATE AGGREGATE myaggn04a(BASETYPE = "ANY", SFUNC = stfp, STYPE = anyarray,
CREATE AGGREGATE myaggn04a(*) (SFUNC = stfp, STYPE = anyarray,
FINALFUNC = ffnp, INITCOND = '{}');
@@ -330,6 +334,10 @@ CREATE AGGREGATE myaggn19a(BASETYPE = anyelement, SFUNC = tf1p,
CREATE AGGREGATE myaggn20a(BASETYPE = anyelement, SFUNC = tfp,
STYPE = anyarray, FINALFUNC = ffnp, INITCOND = '{}');
-- multi-arg polymorphic
CREATE AGGREGATE mysum2(anyelement,anyelement) (SFUNC = sum3,
STYPE = anyelement, INITCOND = '0');
-- create test data for polymorphic aggregates
create temp table t(f1 int, f2 int[], f3 text);
insert into t values(1,array[1],'a');
@@ -365,3 +373,4 @@ select f3, myaggn08a(f1) from t group by f3;
select f3, myaggn08b(f1) from t group by f3;
select f3, myaggn09a(f1) from t group by f3;
select f3, myaggn10a(f1) from t group by f3;
select mysum2(f1, f1 + 1) from t;