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--
-- CREATE_AGGREGATE
--
-- all functions CREATEd
CREATE AGGREGATE newavg (
sfunc = int4_avg_accum, basetype = int4, stype = _int8,
finalfunc = int8_avg,
initcond1 = '{0,0}'
);
-- test comments
COMMENT ON AGGREGATE newavg_wrong (int4) IS 'an agg comment';
ERROR: aggregate newavg_wrong(integer) does not exist
COMMENT ON AGGREGATE newavg (int4) IS 'an agg comment';
COMMENT ON AGGREGATE newavg (int4) IS NULL;
-- without finalfunc; test obsolete spellings 'sfunc1' etc
CREATE AGGREGATE newsum (
sfunc1 = int4pl, basetype = int4, stype1 = int4,
initcond1 = '0'
);
-- zero-argument aggregate
CREATE AGGREGATE newcnt (*) (
sfunc = int8inc, stype = int8,
initcond = '0'
);
-- old-style spelling of same
CREATE AGGREGATE oldcnt (
sfunc = int8inc, basetype = 'ANY', stype = int8,
initcond = '0'
);
-- aggregate that only cares about null/nonnull input
CREATE AGGREGATE newcnt ("any") (
sfunc = int8inc_any, stype = int8,
initcond = '0'
);
COMMENT ON AGGREGATE nosuchagg (*) IS 'should fail';
ERROR: aggregate nosuchagg(*) does not exist
COMMENT ON AGGREGATE newcnt (*) IS 'an agg(*) comment';
COMMENT ON AGGREGATE newcnt ("any") IS 'an agg(any) comment';
-- multi-argument aggregate
create function sum3(int8,int8,int8) returns int8 as
'select $1 + $2 + $3' language sql strict immutable;
create aggregate sum2(int8,int8) (
sfunc = sum3, stype = int8,
initcond = '0'
);
-- multi-argument aggregates sensitive to distinct/order, strict/nonstrict
create type aggtype as (a integer, b integer, c text);
create function aggf_trans(aggtype[],integer,integer,text) returns aggtype[]
as 'select array_append($1,ROW($2,$3,$4)::aggtype)'
language sql strict immutable;
create function aggfns_trans(aggtype[],integer,integer,text) returns aggtype[]
as 'select array_append($1,ROW($2,$3,$4)::aggtype)'
language sql immutable;
create aggregate aggfstr(integer,integer,text) (
sfunc = aggf_trans, stype = aggtype[],
initcond = '{}'
);
create aggregate aggfns(integer,integer,text) (
sfunc = aggfns_trans, stype = aggtype[],
initcond = '{}'
);
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