-- directory paths are passed to us in environment variables
\getenv abs_srcdir PG_ABS_SRCDIR
-- avoid bit-exact output here because operations may not be bit-exact. SET extra_float_digits = 0;
-- prepare some test data CREATETABLE aggtest (
a int2,
b float4
);
\set filename :abs_srcdir '/data/agg.data'
COPY aggtest FROM :'filename';
ANALYZE aggtest;
SELECT avg(four) AS avg_1 FROM onek;
SELECT avg(a) AS avg_32 FROM aggtest WHERE a < 100;
SELECT any_value(v) FROM (VALUES (1), (2), (3)) AS v (v); SELECT any_value(v) FROM (VALUES (NULL)) AS v (v); SELECT any_value(v) FROM (VALUES (NULL), (1), (2)) AS v (v); SELECT any_value(v) FROM (VALUES (array['hello', 'world'])) AS v (v);
-- In 7.1, avg(float4) is computed using float8 arithmetic. -- Round the result to 3 digits to avoid platform-specific results.
SELECT avg(b)::numeric(10,3) AS avg_107_943 FROM aggtest;
SELECT avg(gpa) AS avg_3_4 FROM ONLY student;
SELECT sum(four) AS sum_1500 FROM onek; SELECT sum(a) AS sum_198 FROM aggtest; SELECT sum(b) AS avg_431_773 FROM aggtest; SELECT sum(gpa) AS avg_6_8 FROM ONLY student;
SELECT max(four) AS max_3 FROM onek; SELECT max(a) AS max_100 FROM aggtest; SELECT max(aggtest.b) AS max_324_78 FROM aggtest; SELECT max(student.gpa) AS max_3_7 FROM student;
SELECT stddev_pop(b) FROM aggtest; SELECT stddev_samp(b) FROM aggtest; SELECT var_pop(b) FROM aggtest; SELECT var_samp(b) FROM aggtest;
SELECT stddev_pop(b::numeric) FROM aggtest; SELECT stddev_samp(b::numeric) FROM aggtest; SELECT var_pop(b::numeric) FROM aggtest; SELECT var_samp(b::numeric) FROM aggtest;
-- population variance is defined for a single tuple, sample variance -- is not SELECT var_pop(1.0::float8), var_samp(2.0::float8); SELECT stddev_pop(3.0::float8), stddev_samp(4.0::float8); SELECT var_pop('inf'::float8), var_samp('inf'::float8); SELECT stddev_pop('inf'::float8), stddev_samp('inf'::float8); SELECT var_pop('nan'::float8), var_samp('nan'::float8); SELECT stddev_pop('nan'::float8), stddev_samp('nan'::float8); SELECT var_pop(1.0::float4), var_samp(2.0::float4); SELECT stddev_pop(3.0::float4), stddev_samp(4.0::float4); SELECT var_pop('inf'::float4), var_samp('inf'::float4); SELECT stddev_pop('inf'::float4), stddev_samp('inf'::float4); SELECT var_pop('nan'::float4), var_samp('nan'::float4); SELECT stddev_pop('nan'::float4), stddev_samp('nan'::float4); SELECT var_pop(1.0::numeric), var_samp(2.0::numeric); SELECT stddev_pop(3.0::numeric), stddev_samp(4.0::numeric); SELECT var_pop('inf'::numeric), var_samp('inf'::numeric); SELECT stddev_pop('inf'::numeric), stddev_samp('inf'::numeric); SELECT var_pop('nan'::numeric), var_samp('nan'::numeric); SELECT stddev_pop('nan'::numeric), stddev_samp('nan'::numeric);
-- verify correct results for min(record) and max(record) aggregates SELECT max(row(a,b)) FROM aggtest; SELECT max(row(b,a)) FROM aggtest; SELECT min(row(a,b)) FROM aggtest; SELECT min(row(b,a)) FROM aggtest;
-- verify correct results for null and NaN inputs select sum(null::int4) from generate_series(1,3); select sum(null::int8) from generate_series(1,3); select sum(null::numeric) from generate_series(1,3); select sum(null::float8) from generate_series(1,3); select avg(null::int4) from generate_series(1,3); select avg(null::int8) from generate_series(1,3); select avg(null::numeric) from generate_series(1,3); select avg(null::float8) from generate_series(1,3); select sum('NaN'::numeric) from generate_series(1,3); select avg('NaN'::numeric) from generate_series(1,3);
-- verify correct results for infinite inputs SELECT sum(x::float8), avg(x::float8), var_pop(x::float8) FROM (VALUES ('1'), ('infinity')) v(x); SELECT sum(x::float8), avg(x::float8), var_pop(x::float8) FROM (VALUES ('infinity'), ('1')) v(x); SELECT sum(x::float8), avg(x::float8), var_pop(x::float8) FROM (VALUES ('infinity'), ('infinity')) v(x); SELECT sum(x::float8), avg(x::float8), var_pop(x::float8) FROM (VALUES ('-infinity'), ('infinity')) v(x); SELECT sum(x::float8), avg(x::float8), var_pop(x::float8) FROM (VALUES ('-infinity'), ('-infinity')) v(x); SELECT sum(x::numeric), avg(x::numeric), var_pop(x::numeric) FROM (VALUES ('1'), ('infinity')) v(x); SELECT sum(x::numeric), avg(x::numeric), var_pop(x::numeric) FROM (VALUES ('infinity'), ('1')) v(x); SELECT sum(x::numeric), avg(x::numeric), var_pop(x::numeric) FROM (VALUES ('infinity'), ('infinity')) v(x); SELECT sum(x::numeric), avg(x::numeric), var_pop(x::numeric) FROM (VALUES ('-infinity'), ('infinity')) v(x); SELECT sum(x::numeric), avg(x::numeric), var_pop(x::numeric) FROM (VALUES ('-infinity'), ('-infinity')) v(x);
-- test accuracy with a large input offset SELECT avg(x::float8), var_pop(x::float8) FROM (VALUES (100000003), (100000004), (100000006), (100000007)) v(x); SELECT avg(x::float8), var_pop(x::float8) FROM (VALUES (7000000000005), (7000000000007)) v(x);
-- SQL2003 binary aggregates SELECT regr_count(b, a) FROM aggtest; SELECT regr_sxx(b, a) FROM aggtest; SELECT regr_syy(b, a) FROM aggtest; SELECT regr_sxy(b, a) FROM aggtest; SELECT regr_avgx(b, a), regr_avgy(b, a) FROM aggtest; SELECT regr_r2(b, a) FROM aggtest; SELECT regr_slope(b, a), regr_intercept(b, a) FROM aggtest; SELECT covar_pop(b, a), covar_samp(b, a) FROM aggtest; SELECT corr(b, a) FROM aggtest;
-- test accum and combine functions directly CREATETABLE regr_test (x float8, y float8); INSERTINTO regr_test VALUES (10,150),(20,250),(30,350),(80,540),(100,200); SELECT count(*), sum(x), regr_sxx(y,x), sum(y),regr_syy(y,x), regr_sxy(y,x) FROM regr_test WHERE x IN (10,20,30,80); SELECT count(*), sum(x), regr_sxx(y,x), sum(y),regr_syy(y,x), regr_sxy(y,x) FROM regr_test; SELECT float8_accum('{4,140,2900}'::float8[], 100); SELECT float8_regr_accum('{4,140,2900,1290,83075,15050}'::float8[], 200, 100); SELECT count(*), sum(x), regr_sxx(y,x), sum(y),regr_syy(y,x), regr_sxy(y,x) FROM regr_test WHERE x IN (10,20,30); SELECT count(*), sum(x), regr_sxx(y,x), sum(y),regr_syy(y,x), regr_sxy(y,x) FROM regr_test WHERE x IN (80,100); SELECT float8_combine('{3,60,200}'::float8[], '{0,0,0}'::float8[]); SELECT float8_combine('{0,0,0}'::float8[], '{2,180,200}'::float8[]); SELECT float8_combine('{3,60,200}'::float8[], '{2,180,200}'::float8[]); SELECT float8_regr_combine('{3,60,200,750,20000,2000}'::float8[], '{0,0,0,0,0,0}'::float8[]); SELECT float8_regr_combine('{0,0,0,0,0,0}'::float8[], '{2,180,200,740,57800,-3400}'::float8[]); SELECT float8_regr_combine('{3,60,200,750,20000,2000}'::float8[], '{2,180,200,740,57800,-3400}'::float8[]); DROPTABLE regr_test;
-- test count, distinct SELECT count(four) AS cnt_1000 FROM onek; SELECT count(DISTINCT four) AS cnt_4 FROM onek;
select ten, count(*), sum(four) from onek groupby ten orderby ten;
select ten, count(four), sum(DISTINCT four) from onek groupby ten orderby ten;
-- user-defined aggregates SELECT newavg(four) AS avg_1 FROM onek; SELECT newsum(four) AS sum_1500 FROM onek; SELECT newcnt(four) AS cnt_1000 FROM onek; SELECT newcnt(*) AS cnt_1000 FROM onek; SELECT oldcnt(*) AS cnt_1000 FROM onek; SELECT sum2(q1,q2) FROM int8_tbl;
-- test for outer-level aggregates
-- this should work select ten, sum(distinct four) from onek a groupby ten havingexists (select1from onek b where sum(distinct a.four) = b.four);
-- this should fail because subquery has an agg of its own in WHERE select ten, sum(distinct four) from onek a groupby ten havingexists (select1from onek b where sum(distinct a.four + b.four) = b.four);
-- Test handling of sublinks within outer-level aggregates. -- Per bug report from Daniel Grace. select
(select max((select i.unique2 from tenk1 i where i.unique1 = o.unique1))) from tenk1 o;
-- Test handling of Params within aggregate arguments in hashed aggregation. -- Per bug report from Jeevan Chalke. explain (verbose, costs off) select s1, s2, sm from generate_series(1, 3) s1,
lateral (select s2, sum(s1 + s2) sm from generate_series(1, 3) s2 groupby s2) ss orderby1, 2; select s1, s2, sm from generate_series(1, 3) s1,
lateral (select s2, sum(s1 + s2) sm from generate_series(1, 3) s2 groupby s2) ss orderby1, 2;
explain (verbose, costs off) select array(select sum(x+y) s from generate_series(1,3) y groupby y orderby s) from generate_series(1,3) x; select array(select sum(x+y) s from generate_series(1,3) y groupby y orderby s) from generate_series(1,3) x;
-- -- test for bitwise integer aggregates -- CREATE TEMPORARY TABLE bitwise_test(
i2 INT2,
i4 INT4,
i8 INT8,
i INTEGER,
x INT2,
y BIT(4)
);
-- empty case SELECT
BIT_AND(i2) AS"?",
BIT_OR(i4) AS"?",
BIT_XOR(i8) AS"?" FROM bitwise_test;
-- -- Test cases that should be optimized into indexscans instead of -- the generic aggregate implementation. --
-- Basic cases explain (costs off) select min(unique1) from tenk1; select min(unique1) from tenk1; explain (costs off) select max(unique1) from tenk1; select max(unique1) from tenk1; explain (costs off) select max(unique1) from tenk1 where unique1 < 42; select max(unique1) from tenk1 where unique1 < 42; explain (costs off) select max(unique1) from tenk1 where unique1 > 42; select max(unique1) from tenk1 where unique1 > 42;
-- the planner may choose a generic aggregate here if parallel query is -- enabled, since that plan will be parallel safe and the "optimized" -- plan, which has almost identical cost, will not be. we want to test -- the optimized plan, so temporarily disable parallel query.
begin; set local max_parallel_workers_per_gather = 0; explain (costs off) select max(unique1) from tenk1 where unique1 > 42000; select max(unique1) from tenk1 where unique1 > 42000;
rollback;
-- multi-column index (uses tenk1_thous_tenthous) explain (costs off) select max(tenthous) from tenk1 where thousand = 33; select max(tenthous) from tenk1 where thousand = 33; explain (costs off) select min(tenthous) from tenk1 where thousand = 33; select min(tenthous) from tenk1 where thousand = 33;
-- check parameter propagation into an indexscan subquery explain (costs off) select f1, (select min(unique1) from tenk1 where unique1 > f1) AS gt from int4_tbl; select f1, (select min(unique1) from tenk1 where unique1 > f1) AS gt from int4_tbl;
-- check some cases that were handled incorrectly in 8.3.0 explain (costs off) selectdistinct max(unique2) from tenk1; selectdistinct max(unique2) from tenk1; explain (costs off) select max(unique2) from tenk1 orderby1; select max(unique2) from tenk1 orderby1; explain (costs off) select max(unique2) from tenk1 orderby max(unique2); select max(unique2) from tenk1 orderby max(unique2); explain (costs off) select max(unique2) from tenk1 orderby max(unique2)+1; select max(unique2) from tenk1 orderby max(unique2)+1; explain (costs off) select max(unique2), generate_series(1,3) as g from tenk1 orderby g desc; select max(unique2), generate_series(1,3) as g from tenk1 orderby g desc;
-- interesting corner case: constant gets optimized into a seqscan explain (costs off) select max(100) from tenk1; select max(100) from tenk1;
-- try it on an inheritance tree createtable minmaxtest(f1 int); createtable minmaxtest1() inherits (minmaxtest); createtable minmaxtest2() inherits (minmaxtest); createtable minmaxtest3() inherits (minmaxtest); createindex minmaxtesti on minmaxtest(f1); createindex minmaxtest1i on minmaxtest1(f1); createindex minmaxtest2i on minmaxtest2(f1 desc); createindex minmaxtest3i on minmaxtest3(f1) where f1 isnotnull;
explain (costs off) select min(f1), max(f1) from minmaxtest; select min(f1), max(f1) from minmaxtest;
-- DISTINCT doesn't do anything useful here, but it shouldn't fail explain (costs off) selectdistinct min(f1), max(f1) from minmaxtest; selectdistinct min(f1), max(f1) from minmaxtest;
droptable minmaxtest cascade;
-- DISTINCT can also trigger wrong answers with hash aggregation (bug #18465)
begin; set local enable_sort = off; explain (costs off) select f1, (selectdistinct min(t1.f1) from int4_tbl t1 where t1.f1 = t0.f1) from int4_tbl t0; select f1, (selectdistinct min(t1.f1) from int4_tbl t1 where t1.f1 = t0.f1) from int4_tbl t0;
rollback;
-- check for correct detection of nested-aggregate errors select max(min(unique1)) from tenk1; select (select max(min(unique1)) from int8_tbl) from tenk1; select avg((select avg(a1.col1 orderby (select avg(a2.col2) from tenk1 a3)) from tenk1 a1(col1))) from tenk1 a2(col2);
-- -- Test removal of redundant GROUP BY columns --
create temp table t1 (a int, b int, c int, d int, primarykey (a, b)); create temp table t2 (x int, y int, z int, primarykey (x, y)); create temp table t3 (a int, b int, c int, primarykey(a, b) deferrable);
-- Non-primary-key columns can be removed from GROUP BY explain (costs off) select * from t1 groupby a,b,c,d;
-- No removal can happen if the complete PK is not present in GROUP BY explain (costs off) select a,c from t1 groupby a,c,d;
-- Test removal across multiple relations explain (costs off) select * from t1 innerjoin t2 on t1.a = t2.x and t1.b = t2.y groupby t1.a,t1.b,t1.c,t1.d,t2.x,t2.y,t2.z;
-- Test case where t1 can be optimized but not t2 explain (costs off) select t1.*,t2.x,t2.z from t1 innerjoin t2 on t1.a = t2.x and t1.b = t2.y groupby t1.a,t1.b,t1.c,t1.d,t2.x,t2.z;
-- Cannot optimize when PK is deferrable explain (costs off) select * from t3 groupby a,b,c;
create temp table t1c () inherits (t1);
-- Ensure we don't remove any columns when t1 has a child table explain (costs off) select * from t1 groupby a,b,c,d;
-- Okay to remove columns if we're only querying the parent. explain (costs off) select * from only t1 groupby a,b,c,d;
create temp table p_t1 (
a int,
b int,
c int,
d int, primarykey(a,b)
) partition by list(a); create temp table p_t1_1 partition of p_t1 forvaluesin(1); create temp table p_t1_2 partition of p_t1 forvaluesin(2);
-- Ensure we can remove non-PK columns for partitioned tables. explain (costs off) select * from p_t1 groupby a,b,c,d;
createuniqueindex t2_z_uidx on t2(z);
-- Ensure we don't remove any columns from the GROUP BY for a unique -- index on a NULLable column. explain (costs off) select y,z from t2 groupby y,z;
-- Make the column NOT NULL and ensure we remove the redundant column altertable t2 altercolumn z setnotnull; explain (costs off) select y,z from t2 groupby y,z;
-- When there are multiple supporting unique indexes and the GROUP BY contains -- columns to cover all of those, ensure we pick the index with the least -- number of columns so that we can remove more columns from the GROUP BY. explain (costs off) select x,y,z from t2 groupby x,y,z;
-- As above but try ordering the columns differently to ensure we get the -- same result. explain (costs off) select x,y,z from t2 groupby z,x,y;
-- Ensure we don't use a partial index as proof of functional dependency dropindex t2_z_uidx; createindex t2_z_uidx on t2 (z) where z > 0; explain (costs off) select y,z from t2 groupby y,z;
-- A unique index defined as NULLS NOT DISTINCT does not need a supporting NOT -- NULL constraint on the indexed columns. Ensure the redundant columns are -- removed from the GROUP BY for such a table. dropindex t2_z_uidx; altertable t2 altercolumn z dropnotnull; createuniqueindex t2_z_uidx on t2(z) nulls notdistinct; explain (costs off) select y,z from t2 groupby y,z;
-- A unique index proves uniqueness only under its own opfamily. When the -- GROUP BY's eqop comes from a different opfamily with looser equality, -- rows the index regards as distinct can collapse into one GROUP BY group, -- so the index is not usable for removing redundant columns. create type t_rec as (x numeric); create temp table t_opf (a t_rec notnull, b text); createuniqueindexon t_opf (a record_image_ops); -- (1.0) and (1.00) are bytewise distinct but logically equal as records; -- the index admits both, but GROUP BY a (default record_ops) would merge -- them, so b must be retained as a grouping key. insertinto t_opf values (row(1.0)::t_rec, 'X'), (row(1.00)::t_rec, 'Y'); explain (costs off) select a, b from t_opf groupby a, b orderby b; select a, b from t_opf groupby a, b orderby b; droptable t_opf; drop type t_rec;
select f1 from t1 leftjoin t2 using (f1) groupby f1; select f1 from t1 leftjoin t2 using (f1) groupby t1.f1; select t1.f1 from t1 leftjoin t2 using (f1) groupby t1.f1; -- only this one should fail: select t1.f1 from t1 leftjoin t2 using (f1) groupby f1;
-- check case where we have to inject nullingrels into coerced join alias select f1, count(*) from
t1 x(x0,x1) leftjoin (t1 leftjoin t2 using(f1)) on (x0 = 0) groupby f1;
-- same, for a RelabelType coercion select f2, count(*) from
t1 x(x0,x1) leftjoin (t1 leftjoin t2 using(f2)) on (x0 = 0) groupby f2;
-- check that we preserve join alias in GROUP BY expressions create temp view v1 as select f1::intfrom t1 leftjoin t2 using (f1) groupby f1; select pg_get_viewdef('v1'::regclass);
drop view v1; droptable t1, t2;
-- -- Test planner's selection of pathkeys for ORDER BY aggregates --
-- Ensure we order by four. This suits the most aggregate functions. explain (costs off) select sum(two orderby two),max(four orderby four), min(four orderby four) from tenk1;
-- Ensure we order by two. It's a tie between ordering by two and four but -- we tiebreak on the aggregate's position. explain (costs off) select
sum(two orderby two), max(four orderby four),
min(four orderby four), max(two orderby two) from tenk1;
-- Similar to above, but tiebreak on ordering by four explain (costs off) select
max(four orderby four), sum(two orderby two),
min(four orderby four), max(two orderby two) from tenk1;
-- Ensure this one orders by ten since there are 3 aggregates that require ten -- vs two that suit two and four. explain (costs off) select
max(four orderby four), sum(two orderby two),
min(four orderby four), max(two orderby two),
sum(ten orderby ten), min(ten orderby ten), max(ten orderby ten) from tenk1;
-- Try a case involving a GROUP BY clause where the GROUP BY column is also -- part of an aggregate's ORDER BY clause. We want a sort order that works -- for the GROUP BY along with the first and the last aggregate. explain (costs off) select
sum(unique1 orderby ten, two), sum(unique1 orderby four),
sum(unique1 orderby two, four) from tenk1 groupby ten;
-- Ensure that we never choose to provide presorted input to an Aggref with -- a volatile function in the ORDER BY / DISTINCT clause. We want to ensure -- these sorts are performed individually rather than at the query level. explain (costs off) select
sum(unique1 orderby two), sum(unique1 orderby four),
sum(unique1 orderby four, two), sum(unique1 orderby two, random()),
sum(unique1 orderby two, random(), random() + 1) from tenk1 groupby ten;
-- Ensure consecutive NULLs are properly treated as distinct from each other select array_agg(distinct val) from (selectnullas val from generate_series(1, 2));
-- Ensure no ordering is requested when enable_presorted_aggregate is off set enable_presorted_aggregate to off; explain (costs off) select sum(two orderby two) from tenk1;
reset enable_presorted_aggregate;
-- -- Test cases with FILTER clause --
-- Ensure we presort when the aggregate contains plain Vars explain (costs off) select sum(two orderby two) filter (where two > 1) from tenk1;
-- Ensure we presort for RelabelType'd Vars explain (costs off) select string_agg(distinct f1, ',') filter (where length(f1) > 1) from varchar_tbl;
-- Ensure we don't presort when the aggregate's argument contains an -- explicit cast. explain (costs off) select string_agg(distinct f1::varchar(2), ',') filter (where length(f1) > 1) from varchar_tbl;
-- -- Test combinations of DISTINCT and/or ORDER BY --
select array_agg(a orderby b) from (values (1,4),(2,3),(3,1),(4,2)) v(a,b); select array_agg(a orderby a) from (values (1,4),(2,3),(3,1),(4,2)) v(a,b); select array_agg(a orderby a desc) from (values (1,4),(2,3),(3,1),(4,2)) v(a,b); select array_agg(b orderby a desc) from (values (1,4),(2,3),(3,1),(4,2)) v(a,b);
select array_agg(distinct a) from (values (1),(2),(1),(3),(null),(2)) v(a); select array_agg(distinct a orderby a) from (values (1),(2),(1),(3),(null),(2)) v(a); select array_agg(distinct a orderby a desc) from (values (1),(2),(1),(3),(null),(2)) v(a); select array_agg(distinct a orderby a desc nulls last) from (values (1),(2),(1),(3),(null),(2)) v(a);
-- multi-arg aggs, strict/nonstrict, distinct/order by
select aggfstr(a,b,c) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c); select aggfns(a,b,c) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c);
select aggfstr(distinct a,b,c) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
generate_series(1,3) i; select aggfns(distinct a,b,c) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
generate_series(1,3) i;
select aggfstr(distinct a,b,c orderby b) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
generate_series(1,3) i; select aggfns(distinct a,b,c orderby b) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
generate_series(1,3) i;
-- test specific code paths
select aggfns(distinct a,a,c orderby c using ~<~,a) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
generate_series(1,2) i; select aggfns(distinct a,a,c orderby c using ~<~) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
generate_series(1,2) i; select aggfns(distinct a,a,c orderby a) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
generate_series(1,2) i; select aggfns(distinct a,b,c orderby a,c using ~<~,b) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
generate_series(1,2) i;
-- test a more complex permutation that has previous caused issues select
string_agg(distinct'a', ','),
sum(( select sum(1) from (values(1)) b(id) where a.id = b.id
)) from unnest(array[1]) a(id);
-- check node I/O via view creation and usage, also deparsing logic
create view agg_view1 as select aggfns(a,b,c) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c);
select * from agg_view1; select pg_get_viewdef('agg_view1'::regclass);
createorreplace view agg_view1 as select aggfns(distinct a,b,c) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
generate_series(1,3) i;
select * from agg_view1; select pg_get_viewdef('agg_view1'::regclass);
createorreplace view agg_view1 as select aggfns(distinct a,b,c orderby b) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
generate_series(1,3) i;
select * from agg_view1; select pg_get_viewdef('agg_view1'::regclass);
createorreplace view agg_view1 as select aggfns(a,b,c orderby b+1) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c);
select * from agg_view1; select pg_get_viewdef('agg_view1'::regclass);
createorreplace view agg_view1 as select aggfns(a,a,c orderby b) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c);
select * from agg_view1; select pg_get_viewdef('agg_view1'::regclass);
createorreplace view agg_view1 as select aggfns(a,b,c orderby c using ~<~) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c);
select * from agg_view1; select pg_get_viewdef('agg_view1'::regclass);
createorreplace view agg_view1 as select aggfns(distinct a,b,c orderby a,c using ~<~,b) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
generate_series(1,2) i;
select * from agg_view1; select pg_get_viewdef('agg_view1'::regclass);
-- string_agg tests select string_agg(a,',') from (values('aaaa'),('bbbb'),('cccc')) g(a); select string_agg(a,',') from (values('aaaa'),(null),('bbbb'),('cccc')) g(a); select string_agg(a,'AB') from (values(null),(null),('bbbb'),('cccc')) g(a); select string_agg(a,',') from (values(null),(null)) g(a);
-- check some implicit casting cases, as per bug #5564 select string_agg(distinct f1, ','orderby f1) from varchar_tbl; -- ok select string_agg(distinct f1::text, ','orderby f1) from varchar_tbl; -- not ok select string_agg(distinct f1, ','orderby f1::text) from varchar_tbl; -- not ok select string_agg(distinct f1::text, ','orderby f1::text) from varchar_tbl; -- ok
-- string_agg, min, max bytea tests createtable bytea_test_table(v bytea);
select min(v) from bytea_test_table; select max(v) from bytea_test_table;
droptable bytea_test_table;
-- Test parallel string_agg and array_agg createtable pagg_test (x int, y int) with (autovacuum_enabled = off); insertinto pagg_test select (case x % 4when1thennullelse x end), x % 10 from generate_series(1,5000) x;
set parallel_setup_cost TO0; set parallel_tuple_cost TO0; set parallel_leader_participation TO0; set min_parallel_table_scan_size = 0; set bytea_output = 'escape'; set max_parallel_workers_per_gather = 2;
-- create a view as we otherwise have to repeat this query a few times. create view v_pagg_test AS select
y,
min(t) AS tmin,max(t) AS tmax,count(distinct t) AS tndistinct,
min(b) AS bmin,max(b) AS bmax,count(distinct b) AS bndistinct,
min(a) AS amin,max(a) AS amax,count(distinct a) AS andistinct,
min(aa) AS aamin,max(aa) AS aamax,count(distinct aa) AS aandistinct from ( select
y,
unnest(regexp_split_to_array(a1.t, ','))::intAS t,
unnest(regexp_split_to_array(a1.b::text, ',')) AS b,
unnest(a1.a) AS a,
unnest(a1.aa) AS aa from ( select
y,
string_agg(x::text, ',') AS t,
string_agg(x::text::bytea, ',') AS b,
array_agg(x) AS a,
array_agg(ARRAY[x]) AS aa from pagg_test groupby y
) a1
) a2 groupby y;
-- Ensure results are correct. select * from v_pagg_test orderby y;
-- Ensure parallel aggregation is actually being used. explain (costs off) select * from v_pagg_test orderby y;
-- Ensure results are the same without parallel aggregation. set max_parallel_workers_per_gather = 0; select * from v_pagg_test orderby y;
-- Check that we don't fail on anonymous record types. set max_parallel_workers_per_gather = 2; explain (costs off) select array_dims(array_agg(s)) from (select * from pagg_test) s; select array_dims(array_agg(s)) from (select * from pagg_test) s;
select min(unique1) filter (where unique1 > 100) from tenk1;
select sum(1/ten) filter (where ten > 0) from tenk1;
select ten, sum(distinct four) filter (where four::text ~ '123') from onek a groupby ten;
select ten, sum(distinct four) filter (where four > 10) from onek a groupby ten havingexists (select1from onek b where sum(distinct a.four) = b.four);
select max(foo COLLATE"C") filter (where (bar collate"POSIX") > '0') from (values ('a', 'b')) AS v(foo,bar);
select any_value(v) filter (where v > 2) from (values (1), (2), (3)) as v (v);
-- outer reference in FILTER (PostgreSQL extension) select (select count(*) from (values (1)) t0(inner_c)) from (values (2),(3)) t1(outer_c); -- inner query is aggregation query select (select count(*) filter (where outer_c <> 0) from (values (1)) t0(inner_c)) from (values (2),(3)) t1(outer_c); -- outer query is aggregation query select (select count(inner_c) filter (where outer_c <> 0) from (values (1)) t0(inner_c)) from (values (2),(3)) t1(outer_c); -- inner query is aggregation query select
(select max((select i.unique2 from tenk1 i where i.unique1 = o.unique1))
filter (where o.unique1 < 10)) from tenk1 o; -- outer query is aggregation query
-- subquery in FILTER clause (PostgreSQL extension) select sum(unique1) FILTER (WHERE
unique1 IN (SELECT unique1 FROM onek where unique1 < 100)) FROM tenk1;
-- exercise lots of aggregate parts with FILTER select aggfns(distinct a,b,c orderby a,c using ~<~,b) filter (where a > 1) from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
generate_series(1,2) i;
-- check handling of bare boolean Var in FILTER select max(0) filter (where b1) from bool_test; select (select max(0) filter (where b1)) from bool_test;
-- check for correct detection of nested-aggregate errors in FILTER select max(unique1) filter (where sum(ten) > 0) from tenk1; select (select max(unique1) filter (where sum(ten) > 0) from int8_tbl) from tenk1; select max(unique1) filter (where bool_or(ten > 0)) from tenk1; select (select max(unique1) filter (where bool_or(ten > 0)) from int8_tbl) from tenk1;
-- ordered-set aggregates
select p, percentile_cont(p) within group (orderby x::float8) from generate_series(1,5) x,
(values (0::float8),(0.1),(0.25),(0.4),(0.5),(0.6),(0.75),(0.9),(1)) v(p) groupby p orderby p;
select p, percentile_cont(p orderby p) within group (orderby x) -- error from generate_series(1,5) x,
(values (0::float8),(0.1),(0.25),(0.4),(0.5),(0.6),(0.75),(0.9),(1)) v(p) groupby p orderby p;
select p, sum() within group (orderby x::float8) -- error from generate_series(1,5) x,
(values (0::float8),(0.1),(0.25),(0.4),(0.5),(0.6),(0.75),(0.9),(1)) v(p) groupby p orderby p;
select p, percentile_cont(p,p) -- error from generate_series(1,5) x,
(values (0::float8),(0.1),(0.25),(0.4),(0.5),(0.6),(0.75),(0.9),(1)) v(p) groupby p orderby p;
select percentile_cont(0.5) within group (orderby b) from aggtest; select percentile_cont(0.5) within group (orderby b), sum(b) from aggtest; select percentile_cont(0.5) within group (orderby thousand) from tenk1; select percentile_disc(0.5) within group (orderby thousand) from tenk1; select rank(3) within group (orderby x) from (values (1),(1),(2),(2),(3),(3),(4)) v(x); select cume_dist(3) within group (orderby x) from (values (1),(1),(2),(2),(3),(3),(4)) v(x); select percent_rank(3) within group (orderby x) from (values (1),(1),(2),(2),(3),(3),(4),(5)) v(x); select dense_rank(3) within group (orderby x) from (values (1),(1),(2),(2),(3),(3),(4)) v(x);
select percentile_disc(array[0,0.1,0.25,0.5,0.75,0.9,1]) within group (orderby thousand) from tenk1; select percentile_cont(array[0,0.25,0.5,0.75,1]) within group (orderby thousand) from tenk1; select percentile_disc(array[[null,1,0.5],[0.75,0.25,null]]) within group (orderby thousand) from tenk1; select percentile_cont(array[0,1,0.25,0.75,0.5,1,0.3,0.32,0.35,0.38,0.4]) within group (orderby x) from generate_series(1,6) x;
select ten, mode() within group (orderby string4) from tenk1 groupby ten;
select percentile_disc(array[0.25,0.5,0.75]) within group (orderby x) from unnest('{fred,jim,fred,jack,jill,fred,jill,jim,jim,sheila,jim,sheila}'::text[]) u(x);
-- check collation propagates up in suitable cases: select pg_collation_for(percentile_disc(1) within group (orderby x collate"POSIX")) from (values ('fred'),('jim')) v(x);
-- ordered-set aggs created with CREATE AGGREGATE select test_rank(3) within group (orderby x) from (values (1),(1),(2),(2),(3),(3),(4)) v(x); select test_percentile_disc(0.5) within group (orderby thousand) from tenk1;
-- ordered-set aggs can't use ungrouped vars in direct args: select rank(x) within group (orderby x) from generate_series(1,5) x;
-- outer-level agg can't use a grouped arg of a lower level, either: select array(select percentile_disc(a) within group (orderby x) from (values (0.3),(0.7)) v(a) groupby a) from generate_series(1,5) g(x);
-- agg in the direct args is a grouping violation, too: select rank(sum(x)) within group (orderby x) from generate_series(1,5) x;
-- hypothetical-set type unification and argument-count failures: select rank(3) within group (orderby x) from (values ('fred'),('jim')) v(x); select rank(3) within group (orderby stringu1,stringu2) from tenk1; select rank('fred') within group (orderby x) from generate_series(1,5) x; select rank('adam'::text collate"C") within group (orderby x collate"POSIX") from (values ('fred'),('jim')) v(x); -- hypothetical-set type unification successes: select rank('adam'::varchar) within group (orderby x) from (values ('fred'),('jim')) v(x); select rank('3') within group (orderby x) from generate_series(1,5) x;
-- divide by zero check select percent_rank(0) within group (orderby x) from generate_series(1,0) x;
-- deparse and multiple features: create view aggordview1 as select ten,
percentile_disc(0.5) within group (orderby thousand) as p50,
percentile_disc(0.5) within group (orderby thousand) filter (where hundred=1) as px,
rank(5,'AZZZZ',50) within group (orderby hundred, string4 desc, hundred) from tenk1 groupby ten orderby ten;
select pg_get_viewdef('aggordview1'); select * from aggordview1 orderby ten; drop view aggordview1;
-- variadic aggregates select least_agg(q1,q2) from int8_tbl; select least_agg(variadic array[q1,q2]) from int8_tbl;
select cleast_agg(q1,q2) from int8_tbl; select cleast_agg(4.5,f1) from int4_tbl; select cleast_agg(variadic array[4.5,f1]) from int4_tbl; select pg_typeof(cleast_agg(variadic array[4.5,f1])) from int4_tbl;
-- test aggregates with common transition functions share the same states
begin work;
create type avg_state as (total bigint, count bigint);
createorreplace function avg_transfn(state avg_state, n int) returns avg_state as
$$ declare new_state avg_state;
begin
raise notice 'avg_transfn called with %', n; if state isnullthen if n isnotnullthen
new_state.total := n;
new_state.count := 1; return new_state;
end if; returnnull;
elsif n isnotnullthen
state.total := state.total + n;
state.count := state.count + 1; return state;
end if;
returnnull;
end
$$ language plpgsql;
create function avg_finalfn(state avg_state) returns int4as
$$
begin if state isnullthen returnNULL; else return state.total / state.count;
end if;
end
$$ language plpgsql;
create function sum_finalfn(state avg_state) returns int4as
$$
begin if state isnullthen returnNULL; else return state.total;
end if;
end
$$ language plpgsql;
-- aggregate state should be shared as aggs are the same. select my_avg(one),my_avg(one) from (values(1),(3)) t(one);
-- aggregate state should be shared as transfn is the same for both aggs. select my_avg(one),my_sum(one) from (values(1),(3)) t(one);
-- same as previous one, but with DISTINCT, which requires sorting the input. select my_avg(distinct one),my_sum(distinct one) from (values(1),(3),(1)) t(one);
-- shouldn't share states due to the distinctness not matching. select my_avg(distinct one),my_sum(one) from (values(1),(3)) t(one);
-- shouldn't share states due to the filter clause not matching. select my_avg(one) filter (where one > 1),my_sum(one) from (values(1),(3)) t(one);
-- this should not share the state due to different input columns. select my_avg(one),my_sum(two) from (values(1,2),(3,4)) t(one,two);
-- exercise cases where OSAs share state select
percentile_cont(0.5) within group (orderby a),
percentile_disc(0.5) within group (orderby a) from (values(1::float8),(3),(5),(7)) t(a);
select
percentile_cont(0.25) within group (orderby a),
percentile_disc(0.5) within group (orderby a) from (values(1::float8),(3),(5),(7)) t(a);
-- these can't share state currently select
rank(4) within group (orderby a),
dense_rank(4) within group (orderby a) from (values(1),(3),(5),(7)) t(a);
-- test that aggs with the same sfunc and initcond share the same agg state create aggregate my_sum_init(int4)
(
stype = avg_state,
sfunc = avg_transfn,
finalfunc = sum_finalfn,
initcond = '(10,0)'
);
-- state should be shared if INITCONDs are matching select my_sum_init(one),my_avg_init(one) from (values(1),(3)) t(one);
-- Varying INITCONDs should cause the states not to be shared. select my_sum_init(one),my_avg_init2(one) from (values(1),(3)) t(one);
rollback;
-- test aggregate state sharing to ensure it works if one aggregate has a -- finalfn and the other one has none.
begin work;
createorreplace function sum_transfn(state int4, n int4) returns int4as
$$ declare new_state int4;
begin
raise notice 'sum_transfn called with %', n; if state isnullthen if n isnotnullthen
new_state := n; return new_state;
end if; returnnull;
elsif n isnotnullthen
state := state + n; return state;
end if;
returnnull;
end
$$ language plpgsql;
create function halfsum_finalfn(state int4) returns int4as
$$
begin if state isnullthen returnNULL; else return state / 2;
end if;
end
$$ language plpgsql;
-- Agg state should be shared even though my_sum has no finalfn select my_sum(one),my_half_sum(one) from (values(1),(2),(3),(4)) t(one);
rollback;
-- test that the aggregate transition logic correctly handles -- transition / combine functions returning NULL
-- First test the case of a normal transition function returning NULL
BEGIN; CREATE FUNCTION balkifnull(int8, int4)
RETURNS int8
STRICT
LANGUAGE plpgsql AS $$
BEGIN IF $1ISNULLTHEN
RAISE 'erroneously called with NULL argument';
END IF; RETURNNULL;
END$$;
-- GROUP BY optimization by reordering GROUP BY clauses CREATETABLE btg ASSELECT
i % 10AS x,
i % 10AS y, 'abc' || i % 10AS z,
i AS w FROM generate_series(1, 100) AS i; CREATEINDEX btg_x_y_idx ON btg(x, y); ANALYZE btg;
SET enable_hashagg = off; SET enable_seqscan = off;
-- Utilize the ordering of index scan to avoid a Sort operation EXPLAIN (COSTS OFF) SELECT count(*) FROM btg GROUPBY y, x;
-- Engage incremental sort EXPLAIN (COSTS OFF) SELECT count(*) FROM btg GROUPBY z, y, w, x;
-- Utilize the ordering of subquery scan to avoid a Sort operation EXPLAIN (COSTS OFF) SELECT count(*) FROM (SELECT * FROM btg ORDERBY x, y, w, z) AS q1 GROUPBY w, x, z, y;
-- Utilize the ordering of merge join to avoid a Sort operation SET enable_hashjoin = off; SET enable_nestloop = off; EXPLAIN (COSTS OFF) SELECT count(*) FROM btg t1 JOIN btg t2 ON t1.w = t2.w AND t1.x = t2.x AND t1.z = t2.z GROUPBY t1.w, t1.z, t1.x;
RESET enable_nestloop;
RESET enable_hashjoin;
-- Should work with and without GROUP-BY optimization EXPLAIN (COSTS OFF) SELECT count(*) FROM btg GROUPBY w, x, z, y ORDERBY y, x, z, w;
-- Utilize incremental sort to make the ORDER BY rule a bit cheaper EXPLAIN (COSTS OFF) SELECT count(*) FROM btg GROUPBY w, x, y, z ORDERBY x*x, z;
-- Test the case where the number of incoming subtree path keys is more than -- the number of grouping keys. CREATEINDEX btg_y_x_w_idx ON btg(y, x, w); EXPLAIN (VERBOSE, COSTS OFF) SELECT y, x, array_agg(distinct w) FROM btg WHERE y < 0GROUPBY x, y;
-- Ensure that we do not select the aggregate pathkeys instead of the grouping -- pathkeys CREATETABLE group_agg_pk ASSELECT
i % 10AS x,
i % 2AS y,
i % 2AS z, 2AS w,
i % 10AS f FROM generate_series(1,100) AS i; ANALYZE group_agg_pk; SET enable_nestloop = off; SET enable_hashjoin = off;
EXPLAIN (COSTS OFF) SELECT avg(c1.f ORDERBY c1.x, c1.y) FROM group_agg_pk c1 JOIN group_agg_pk c2 ON c1.x = c2.x GROUPBY c1.w, c1.z; SELECT avg(c1.f ORDERBY c1.x, c1.y) FROM group_agg_pk c1 JOIN group_agg_pk c2 ON c1.x = c2.x GROUPBY c1.w, c1.z;
-- Pathkeys, built in a subtree, can be used to optimize GROUP-BY clause -- ordering. Also, here we check that it doesn't depend on the initial clause -- order in the GROUP-BY list. EXPLAIN (COSTS OFF) SELECT c1.y,c1.x FROM group_agg_pk c1 JOIN group_agg_pk c2 ON c1.x = c2.x GROUPBY c1.y,c1.x,c2.x; EXPLAIN (COSTS OFF) SELECT c1.y,c1.x FROM group_agg_pk c1 JOIN group_agg_pk c2 ON c1.x = c2.x GROUPBY c1.y,c2.x,c1.x;
-- Test the case where the ordering of the scan matches the ordering within the -- aggregate but cannot be found in the group-by list CREATETABLE agg_sort_order (c1 intPRIMARYKEY, c2 int); CREATEUNIQUEINDEX agg_sort_order_c2_idx ON agg_sort_order(c2); INSERTINTO agg_sort_order SELECT i, i FROM generate_series(1,100)i; ANALYZE agg_sort_order;
EXPLAIN (COSTS OFF) SELECT array_agg(c1 ORDERBY c2),c2 FROM agg_sort_order WHERE c2 < 100GROUPBY c1 ORDERBY2;
DROPTABLE agg_sort_order CASCADE;
DROPTABLE btg;
RESET enable_hashagg;
RESET enable_seqscan;
-- Secondly test the case of a parallel aggregate combiner function -- returning NULL. For that use normal transition function, but a -- combiner function returning NULL.
BEGIN; CREATE FUNCTION balkifnull(int8, int8)
RETURNS int8
PARALLEL SAFE
STRICT
LANGUAGE plpgsql AS $$
BEGIN IF $1ISNULLTHEN
RAISE 'erroneously called with NULL argument';
END IF; RETURNNULL;
END$$;
-- force use of parallelism ALTERTABLE tenk1 set (parallel_workers = 4); SET LOCAL parallel_setup_cost=0; SET LOCAL max_parallel_workers_per_gather=4;
EXPLAIN (COSTS OFF) SELECT balk(hundred) FROM tenk1; SELECT balk(hundred) FROM tenk1;
ROLLBACK;
-- test multiple usage of an aggregate whose finalfn returns a R/W datum
BEGIN;
CREATE FUNCTION rwagg_sfunc(x anyarray, y anyarray) RETURNS anyarray
LANGUAGE plpgsql IMMUTABLE AS $$
BEGIN RETURN array_fill(y[1], ARRAY[4]);
END;
$$;
CREATE FUNCTION rwagg_finalfunc(x anyarray) RETURNS anyarray
LANGUAGE plpgsql STRICT IMMUTABLE AS $$ DECLARE
res x%TYPE;
BEGIN -- assignment is essential for this test, it expands the array to R/W
res := array_fill(x[1], ARRAY[4]); RETURN res;
END;
$$;
-- test coverage for aggregate combine/serial/deserial functions
BEGIN;
SET parallel_setup_cost = 0; SET parallel_tuple_cost = 0; SET min_parallel_table_scan_size = 0; SET max_parallel_workers_per_gather = 4; SET parallel_leader_participation = off; SET enable_indexonlyscan = off;
-- variance(int4) covers numeric_poly_combine -- sum(int8) covers int8_avg_combine -- regr_count(float8, float8) covers int8inc_float8_float8 and aggregates with > 1 arg EXPLAIN (COSTS OFF, VERBOSE) SELECT variance(unique1::int4), sum(unique1::int8), regr_count(unique1::float8, unique1::float8) FROM (SELECT * FROM tenk1 UNIONALLSELECT * FROM tenk1 UNIONALLSELECT * FROM tenk1 UNIONALLSELECT * FROM tenk1) u;
SELECT variance(unique1::int4), sum(unique1::int8), regr_count(unique1::float8, unique1::float8) FROM (SELECT * FROM tenk1 UNIONALLSELECT * FROM tenk1 UNIONALLSELECT * FROM tenk1 UNIONALLSELECT * FROM tenk1) u;
-- variance(int8) covers numeric_combine -- avg(numeric) covers numeric_avg_combine EXPLAIN (COSTS OFF, VERBOSE) SELECT variance(unique1::int8), avg(unique1::numeric) FROM (SELECT * FROM tenk1 UNIONALLSELECT * FROM tenk1 UNIONALLSELECT * FROM tenk1 UNIONALLSELECT * FROM tenk1) u;
SELECT variance(unique1::int8), avg(unique1::numeric) FROM (SELECT * FROM tenk1 UNIONALLSELECT * FROM tenk1 UNIONALLSELECT * FROM tenk1 UNIONALLSELECT * FROM tenk1) u;
ROLLBACK;
-- test coverage for dense_rank SELECT dense_rank(x) WITHIN GROUP (ORDERBY x) FROM (VALUES (1),(1),(2),(2),(3),(3)) v(x) GROUPBY (x) ORDERBY1;
-- Ensure that the STRICT checks for aggregates does not take NULLness -- of ORDER BY columns into account. See bug report around -- 2a505161-2727-2473-7c46-591ed108ac52@email.cz SELECT min(x ORDERBY y) FROM (VALUES(1, NULL)) AS d(x,y); SELECT min(x ORDERBY y) FROM (VALUES(1, 2)) AS d(x,y);
-- check collation-sensitive matching between grouping expressions select v||'a', case v||'a'when'aa'then1else0 end, count(*) from unnest(array['a','b']) u(v) groupby v||'a'orderby1; select v||'a', casewhen v||'a' = 'aa'then1else0 end, count(*) from unnest(array['a','b']) u(v) groupby v||'a'orderby1;
-- -- Hash Aggregation Spill tests --
set enable_sort=false; set work_mem='64kB';
select unique1, count(*), sum(twothousand) from tenk1 groupby unique1 having sum(fivethous) > 4975 orderby sum(twothousand);
set work_mem todefault; set enable_sort todefault;
-- -- Compare results between plans using sorting and plans using hash -- aggregation. Force spilling in both cases by setting work_mem low. --
set work_mem='64kB';
createtable agg_data_2k as select g from generate_series(0, 1999) g; analyze agg_data_2k;
createtable agg_data_20k as select g from generate_series(0, 19999) g; analyze agg_data_20k;
-- Produce results with sorting.
set enable_hashagg = false;
set jit_above_cost = 0;
explain (costs off) select g%10000as c1, sum(g::numeric) as c2, count(*) as c3 from agg_data_20k groupby g%10000;
createtable agg_group_1 as select g%10000as c1, sum(g::numeric) as c2, count(*) as c3 from agg_data_20k groupby g%10000;
createtable agg_group_2 as select * from
(values (100), (300), (500)) as r(a),
lateral ( select (g/2)::numericas c1,
array_agg(g::numeric) as c2,
count(*) as c3 from agg_data_2k where g < r.a groupby g/2) as s;
set jit_above_cost todefault;
createtable agg_group_3 as select (g/2)::numericas c1, sum(7::int4) as c2, count(*) as c3 from agg_data_2k groupby g/2;
createtable agg_group_4 as select (g/2)::numericas c1, array_agg(g::numeric) as c2, count(*) as c3 from agg_data_2k groupby g/2;
-- Produce results with hash aggregation
set enable_hashagg = true; set enable_sort = false;
set jit_above_cost = 0;
explain (costs off) select g%10000as c1, sum(g::numeric) as c2, count(*) as c3 from agg_data_20k groupby g%10000;
createtable agg_hash_1 as select g%10000as c1, sum(g::numeric) as c2, count(*) as c3 from agg_data_20k groupby g%10000;
createtable agg_hash_2 as select * from
(values (100), (300), (500)) as r(a),
lateral ( select (g/2)::numericas c1,
array_agg(g::numeric) as c2,
count(*) as c3 from agg_data_2k where g < r.a groupby g/2) as s;
set jit_above_cost todefault;
createtable agg_hash_3 as select (g/2)::numericas c1, sum(7::int4) as c2, count(*) as c3 from agg_data_2k groupby g/2;
createtable agg_hash_4 as select (g/2)::numericas c1, array_agg(g::numeric) as c2, count(*) as c3 from agg_data_2k groupby g/2;
set enable_sort = true; set work_mem todefault;
-- Compare group aggregation results to hash aggregation results
(select * from agg_hash_1 except select * from agg_group_1) unionall
(select * from agg_group_1 except select * from agg_hash_1);
(select * from agg_hash_2 except select * from agg_group_2) unionall
(select * from agg_group_2 except select * from agg_hash_2);
(select * from agg_hash_3 except select * from agg_group_3) unionall
(select * from agg_group_3 except select * from agg_hash_3);
(select * from agg_hash_4 except select * from agg_group_4) unionall
(select * from agg_group_4 except select * from agg_hash_4);