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+--
+-- grouping sets
+--
+-- test data sources
+create temp view gstest1(a,b,v)
+ as values (1,1,10),(1,1,11),(1,2,12),(1,2,13),(1,3,14),
+ (2,3,15),
+ (3,3,16),(3,4,17),
+ (4,1,18),(4,1,19);
+create temp table gstest2 (a integer, b integer, c integer, d integer,
+ e integer, f integer, g integer, h integer);
+copy gstest2 from stdin;
+create temp table gstest3 (a integer, b integer, c integer, d integer);
+copy gstest3 from stdin;
+alter table gstest3 add primary key (a);
+create temp table gstest4(id integer, v integer,
+ unhashable_col bit(4), unsortable_col xid);
+insert into gstest4
+values (1,1,b'0000','1'), (2,2,b'0001','1'),
+ (3,4,b'0010','2'), (4,8,b'0011','2'),
+ (5,16,b'0000','2'), (6,32,b'0001','2'),
+ (7,64,b'0010','1'), (8,128,b'0011','1');
+create temp table gstest_empty (a integer, b integer, v integer);
+create function gstest_data(v integer, out a integer, out b integer)
+ returns setof record
+ as $f$
+ begin
+ return query select v, i from generate_series(1,3) i;
+ end;
+ $f$ language plpgsql;
+-- basic functionality
+set enable_hashagg = false; -- test hashing explicitly later
+-- simple rollup with multiple plain aggregates, with and without ordering
+-- (and with ordering differing from grouping)
+select a, b, grouping(a,b), sum(v), count(*), max(v)
+ from gstest1 group by rollup (a,b);
+ a | b | grouping | sum | count | max
+---+---+----------+-----+-------+-----
+ 1 | 1 | 0 | 21 | 2 | 11
+ 1 | 2 | 0 | 25 | 2 | 13
+ 1 | 3 | 0 | 14 | 1 | 14
+ 1 | | 1 | 60 | 5 | 14
+ 2 | 3 | 0 | 15 | 1 | 15
+ 2 | | 1 | 15 | 1 | 15
+ 3 | 3 | 0 | 16 | 1 | 16
+ 3 | 4 | 0 | 17 | 1 | 17
+ 3 | | 1 | 33 | 2 | 17
+ 4 | 1 | 0 | 37 | 2 | 19
+ 4 | | 1 | 37 | 2 | 19
+ | | 3 | 145 | 10 | 19
+(12 rows)
+
+select a, b, grouping(a,b), sum(v), count(*), max(v)
+ from gstest1 group by rollup (a,b) order by a,b;
+ a | b | grouping | sum | count | max
+---+---+----------+-----+-------+-----
+ 1 | 1 | 0 | 21 | 2 | 11
+ 1 | 2 | 0 | 25 | 2 | 13
+ 1 | 3 | 0 | 14 | 1 | 14
+ 1 | | 1 | 60 | 5 | 14
+ 2 | 3 | 0 | 15 | 1 | 15
+ 2 | | 1 | 15 | 1 | 15
+ 3 | 3 | 0 | 16 | 1 | 16
+ 3 | 4 | 0 | 17 | 1 | 17
+ 3 | | 1 | 33 | 2 | 17
+ 4 | 1 | 0 | 37 | 2 | 19
+ 4 | | 1 | 37 | 2 | 19
+ | | 3 | 145 | 10 | 19
+(12 rows)
+
+select a, b, grouping(a,b), sum(v), count(*), max(v)
+ from gstest1 group by rollup (a,b) order by b desc, a;
+ a | b | grouping | sum | count | max
+---+---+----------+-----+-------+-----
+ 1 | | 1 | 60 | 5 | 14
+ 2 | | 1 | 15 | 1 | 15
+ 3 | | 1 | 33 | 2 | 17
+ 4 | | 1 | 37 | 2 | 19
+ | | 3 | 145 | 10 | 19
+ 3 | 4 | 0 | 17 | 1 | 17
+ 1 | 3 | 0 | 14 | 1 | 14
+ 2 | 3 | 0 | 15 | 1 | 15
+ 3 | 3 | 0 | 16 | 1 | 16
+ 1 | 2 | 0 | 25 | 2 | 13
+ 1 | 1 | 0 | 21 | 2 | 11
+ 4 | 1 | 0 | 37 | 2 | 19
+(12 rows)
+
+select a, b, grouping(a,b), sum(v), count(*), max(v)
+ from gstest1 group by rollup (a,b) order by coalesce(a,0)+coalesce(b,0);
+ a | b | grouping | sum | count | max
+---+---+----------+-----+-------+-----
+ | | 3 | 145 | 10 | 19
+ 1 | | 1 | 60 | 5 | 14
+ 1 | 1 | 0 | 21 | 2 | 11
+ 2 | | 1 | 15 | 1 | 15
+ 3 | | 1 | 33 | 2 | 17
+ 1 | 2 | 0 | 25 | 2 | 13
+ 1 | 3 | 0 | 14 | 1 | 14
+ 4 | | 1 | 37 | 2 | 19
+ 4 | 1 | 0 | 37 | 2 | 19
+ 2 | 3 | 0 | 15 | 1 | 15
+ 3 | 3 | 0 | 16 | 1 | 16
+ 3 | 4 | 0 | 17 | 1 | 17
+(12 rows)
+
+-- various types of ordered aggs
+select a, b, grouping(a,b),
+ array_agg(v order by v),
+ string_agg(v::text, ':' order by v desc),
+ percentile_disc(0.5) within group (order by v),
+ rank(1,2,12) within group (order by a,b,v)
+ from gstest1 group by rollup (a,b) order by a,b;
+ a | b | grouping | array_agg | string_agg | percentile_disc | rank
+---+---+----------+---------------------------------+-------------------------------+-----------------+------
+ 1 | 1 | 0 | {10,11} | 11:10 | 10 | 3
+ 1 | 2 | 0 | {12,13} | 13:12 | 12 | 1
+ 1 | 3 | 0 | {14} | 14 | 14 | 1
+ 1 | | 1 | {10,11,12,13,14} | 14:13:12:11:10 | 12 | 3
+ 2 | 3 | 0 | {15} | 15 | 15 | 1
+ 2 | | 1 | {15} | 15 | 15 | 1
+ 3 | 3 | 0 | {16} | 16 | 16 | 1
+ 3 | 4 | 0 | {17} | 17 | 17 | 1
+ 3 | | 1 | {16,17} | 17:16 | 16 | 1
+ 4 | 1 | 0 | {18,19} | 19:18 | 18 | 1
+ 4 | | 1 | {18,19} | 19:18 | 18 | 1
+ | | 3 | {10,11,12,13,14,15,16,17,18,19} | 19:18:17:16:15:14:13:12:11:10 | 14 | 3
+(12 rows)
+
+-- test usage of grouped columns in direct args of aggs
+select grouping(a), a, array_agg(b),
+ rank(a) within group (order by b nulls first),
+ rank(a) within group (order by b nulls last)
+ from (values (1,1),(1,4),(1,5),(3,1),(3,2)) v(a,b)
+ group by rollup (a) order by a;
+ grouping | a | array_agg | rank | rank
+----------+---+-------------+------+------
+ 0 | 1 | {1,4,5} | 1 | 1
+ 0 | 3 | {1,2} | 3 | 3
+ 1 | | {1,4,5,1,2} | 1 | 6
+(3 rows)
+
+-- nesting with window functions
+select a, b, sum(c), sum(sum(c)) over (order by a,b) as rsum
+ from gstest2 group by rollup (a,b) order by rsum, a, b;
+ a | b | sum | rsum
+---+---+-----+------
+ 1 | 1 | 8 | 8
+ 1 | 2 | 2 | 10
+ 1 | | 10 | 20
+ 2 | 2 | 2 | 22
+ 2 | | 2 | 24
+ | | 12 | 36
+(6 rows)
+
+-- nesting with grouping sets
+select sum(c) from gstest2
+ group by grouping sets((), grouping sets((), grouping sets(())))
+ order by 1 desc;
+ sum
+-----
+ 12
+ 12
+ 12
+(3 rows)
+
+select sum(c) from gstest2
+ group by grouping sets((), grouping sets((), grouping sets(((a, b)))))
+ order by 1 desc;
+ sum
+-----
+ 12
+ 12
+ 8
+ 2
+ 2
+(5 rows)
+
+select sum(c) from gstest2
+ group by grouping sets(grouping sets(rollup(c), grouping sets(cube(c))))
+ order by 1 desc;
+ sum
+-----
+ 12
+ 12
+ 6
+ 6
+ 6
+ 6
+(6 rows)
+
+select sum(c) from gstest2
+ group by grouping sets(a, grouping sets(a, cube(b)))
+ order by 1 desc;
+ sum
+-----
+ 12
+ 10
+ 10
+ 8
+ 4
+ 2
+ 2
+(7 rows)
+
+select sum(c) from gstest2
+ group by grouping sets(grouping sets((a, (b))))
+ order by 1 desc;
+ sum
+-----
+ 8
+ 2
+ 2
+(3 rows)
+
+select sum(c) from gstest2
+ group by grouping sets(grouping sets((a, b)))
+ order by 1 desc;
+ sum
+-----
+ 8
+ 2
+ 2
+(3 rows)
+
+select sum(c) from gstest2
+ group by grouping sets(grouping sets(a, grouping sets(a), a))
+ order by 1 desc;
+ sum
+-----
+ 10
+ 10
+ 10
+ 2
+ 2
+ 2
+(6 rows)
+
+select sum(c) from gstest2
+ group by grouping sets(grouping sets(a, grouping sets(a, grouping sets(a), ((a)), a, grouping sets(a), (a)), a))
+ order by 1 desc;
+ sum
+-----
+ 10
+ 10
+ 10
+ 10
+ 10
+ 10
+ 10
+ 10
+ 2
+ 2
+ 2
+ 2
+ 2
+ 2
+ 2
+ 2
+(16 rows)
+
+select sum(c) from gstest2
+ group by grouping sets((a,(a,b)), grouping sets((a,(a,b)),a))
+ order by 1 desc;
+ sum
+-----
+ 10
+ 8
+ 8
+ 2
+ 2
+ 2
+ 2
+ 2
+(8 rows)
+
+-- empty input: first is 0 rows, second 1, third 3 etc.
+select a, b, sum(v), count(*) from gstest_empty group by grouping sets ((a,b),a);
+ a | b | sum | count
+---+---+-----+-------
+(0 rows)
+
+select a, b, sum(v), count(*) from gstest_empty group by grouping sets ((a,b),());
+ a | b | sum | count
+---+---+-----+-------
+ | | | 0
+(1 row)
+
+select a, b, sum(v), count(*) from gstest_empty group by grouping sets ((a,b),(),(),());
+ a | b | sum | count
+---+---+-----+-------
+ | | | 0
+ | | | 0
+ | | | 0
+(3 rows)
+
+select sum(v), count(*) from gstest_empty group by grouping sets ((),(),());
+ sum | count
+-----+-------
+ | 0
+ | 0
+ | 0
+(3 rows)
+
+-- empty input with joins tests some important code paths
+select t1.a, t2.b, sum(t1.v), count(*) from gstest_empty t1, gstest_empty t2
+ group by grouping sets ((t1.a,t2.b),());
+ a | b | sum | count
+---+---+-----+-------
+ | | | 0
+(1 row)
+
+-- simple joins, var resolution, GROUPING on join vars
+select t1.a, t2.b, grouping(t1.a, t2.b), sum(t1.v), max(t2.a)
+ from gstest1 t1, gstest2 t2
+ group by grouping sets ((t1.a, t2.b), ());
+ a | b | grouping | sum | max
+---+---+----------+------+-----
+ 1 | 1 | 0 | 420 | 1
+ 1 | 2 | 0 | 120 | 2
+ 2 | 1 | 0 | 105 | 1
+ 2 | 2 | 0 | 30 | 2
+ 3 | 1 | 0 | 231 | 1
+ 3 | 2 | 0 | 66 | 2
+ 4 | 1 | 0 | 259 | 1
+ 4 | 2 | 0 | 74 | 2
+ | | 3 | 1305 | 2
+(9 rows)
+
+select t1.a, t2.b, grouping(t1.a, t2.b), sum(t1.v), max(t2.a)
+ from gstest1 t1 join gstest2 t2 on (t1.a=t2.a)
+ group by grouping sets ((t1.a, t2.b), ());
+ a | b | grouping | sum | max
+---+---+----------+-----+-----
+ 1 | 1 | 0 | 420 | 1
+ 1 | 2 | 0 | 60 | 1
+ 2 | 2 | 0 | 15 | 2
+ | | 3 | 495 | 2
+(4 rows)
+
+select a, b, grouping(a, b), sum(t1.v), max(t2.c)
+ from gstest1 t1 join gstest2 t2 using (a,b)
+ group by grouping sets ((a, b), ());
+ a | b | grouping | sum | max
+---+---+----------+-----+-----
+ 1 | 1 | 0 | 147 | 2
+ 1 | 2 | 0 | 25 | 2
+ | | 3 | 172 | 2
+(3 rows)
+
+-- check that functionally dependent cols are not nulled
+select a, d, grouping(a,b,c)
+ from gstest3
+ group by grouping sets ((a,b), (a,c));
+ a | d | grouping
+---+---+----------
+ 1 | 1 | 1
+ 2 | 2 | 1
+ 1 | 1 | 2
+ 2 | 2 | 2
+(4 rows)
+
+-- check that distinct grouping columns are kept separate
+-- even if they are equal()
+explain (costs off)
+select g as alias1, g as alias2
+ from generate_series(1,3) g
+ group by alias1, rollup(alias2);
+ QUERY PLAN
+------------------------------------------------
+ GroupAggregate
+ Group Key: g, g
+ Group Key: g
+ -> Sort
+ Sort Key: g
+ -> Function Scan on generate_series g
+(6 rows)
+
+select g as alias1, g as alias2
+ from generate_series(1,3) g
+ group by alias1, rollup(alias2);
+ alias1 | alias2
+--------+--------
+ 1 | 1
+ 1 |
+ 2 | 2
+ 2 |
+ 3 | 3
+ 3 |
+(6 rows)
+
+-- check that pulled-up subquery outputs still go to null when appropriate
+select four, x
+ from (select four, ten, 'foo'::text as x from tenk1) as t
+ group by grouping sets (four, x)
+ having x = 'foo';
+ four | x
+------+-----
+ | foo
+(1 row)
+
+select four, x || 'x'
+ from (select four, ten, 'foo'::text as x from tenk1) as t
+ group by grouping sets (four, x)
+ order by four;
+ four | ?column?
+------+----------
+ 0 |
+ 1 |
+ 2 |
+ 3 |
+ | foox
+(5 rows)
+
+select (x+y)*1, sum(z)
+ from (select 1 as x, 2 as y, 3 as z) s
+ group by grouping sets (x+y, x);
+ ?column? | sum
+----------+-----
+ 3 | 3
+ | 3
+(2 rows)
+
+select x, not x as not_x, q2 from
+ (select *, q1 = 1 as x from int8_tbl i1) as t
+ group by grouping sets(x, q2)
+ order by x, q2;
+ x | not_x | q2
+---+-------+-------------------
+ f | t |
+ | | -4567890123456789
+ | | 123
+ | | 456
+ | | 4567890123456789
+(5 rows)
+
+-- check qual push-down rules for a subquery with grouping sets
+explain (verbose, costs off)
+select * from (
+ select 1 as x, q1, sum(q2)
+ from int8_tbl i1
+ group by grouping sets(1, 2)
+) ss
+where x = 1 and q1 = 123;
+ QUERY PLAN
+--------------------------------------------
+ Subquery Scan on ss
+ Output: ss.x, ss.q1, ss.sum
+ Filter: ((ss.x = 1) AND (ss.q1 = 123))
+ -> GroupAggregate
+ Output: (1), i1.q1, sum(i1.q2)
+ Group Key: 1
+ Sort Key: i1.q1
+ Group Key: i1.q1
+ -> Seq Scan on public.int8_tbl i1
+ Output: 1, i1.q1, i1.q2
+(10 rows)
+
+select * from (
+ select 1 as x, q1, sum(q2)
+ from int8_tbl i1
+ group by grouping sets(1, 2)
+) ss
+where x = 1 and q1 = 123;
+ x | q1 | sum
+---+----+-----
+(0 rows)
+
+-- check handling of pulled-up SubPlan in GROUPING() argument (bug #17479)
+explain (verbose, costs off)
+select grouping(ss.x)
+from int8_tbl i1
+cross join lateral (select (select i1.q1) as x) ss
+group by ss.x;
+ QUERY PLAN
+------------------------------------------------
+ GroupAggregate
+ Output: GROUPING((SubPlan 1)), ((SubPlan 2))
+ Group Key: ((SubPlan 2))
+ -> Sort
+ Output: ((SubPlan 2)), i1.q1
+ Sort Key: ((SubPlan 2))
+ -> Seq Scan on public.int8_tbl i1
+ Output: (SubPlan 2), i1.q1
+ SubPlan 2
+ -> Result
+ Output: i1.q1
+(11 rows)
+
+select grouping(ss.x)
+from int8_tbl i1
+cross join lateral (select (select i1.q1) as x) ss
+group by ss.x;
+ grouping
+----------
+ 0
+ 0
+(2 rows)
+
+explain (verbose, costs off)
+select (select grouping(ss.x))
+from int8_tbl i1
+cross join lateral (select (select i1.q1) as x) ss
+group by ss.x;
+ QUERY PLAN
+--------------------------------------------
+ GroupAggregate
+ Output: (SubPlan 2), ((SubPlan 3))
+ Group Key: ((SubPlan 3))
+ -> Sort
+ Output: ((SubPlan 3)), i1.q1
+ Sort Key: ((SubPlan 3))
+ -> Seq Scan on public.int8_tbl i1
+ Output: (SubPlan 3), i1.q1
+ SubPlan 3
+ -> Result
+ Output: i1.q1
+ SubPlan 2
+ -> Result
+ Output: GROUPING((SubPlan 1))
+(14 rows)
+
+select (select grouping(ss.x))
+from int8_tbl i1
+cross join lateral (select (select i1.q1) as x) ss
+group by ss.x;
+ grouping
+----------
+ 0
+ 0
+(2 rows)
+
+-- simple rescan tests
+select a, b, sum(v.x)
+ from (values (1),(2)) v(x), gstest_data(v.x)
+ group by rollup (a,b);
+ a | b | sum
+---+---+-----
+ 1 | 1 | 1
+ 1 | 2 | 1
+ 1 | 3 | 1
+ 1 | | 3
+ 2 | 1 | 2
+ 2 | 2 | 2
+ 2 | 3 | 2
+ 2 | | 6
+ | | 9
+(9 rows)
+
+select *
+ from (values (1),(2)) v(x),
+ lateral (select a, b, sum(v.x) from gstest_data(v.x) group by rollup (a,b)) s;
+ERROR: aggregate functions are not allowed in FROM clause of their own query level
+LINE 3: lateral (select a, b, sum(v.x) from gstest_data(v.x) ...
+ ^
+-- min max optimization should still work with GROUP BY ()
+explain (costs off)
+ select min(unique1) from tenk1 GROUP BY ();
+ QUERY PLAN
+------------------------------------------------------------
+ Result
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Index Only Scan using tenk1_unique1 on tenk1
+ Index Cond: (unique1 IS NOT NULL)
+(5 rows)
+
+-- Views with GROUPING SET queries
+CREATE VIEW gstest_view AS select a, b, grouping(a,b), sum(c), count(*), max(c)
+ from gstest2 group by rollup ((a,b,c),(c,d));
+NOTICE: view "gstest_view" will be a temporary view
+select pg_get_viewdef('gstest_view'::regclass, true);
+ pg_get_viewdef
+-------------------------------------------------------------------------------
+ SELECT gstest2.a, +
+ gstest2.b, +
+ GROUPING(gstest2.a, gstest2.b) AS "grouping", +
+ sum(gstest2.c) AS sum, +
+ count(*) AS count, +
+ max(gstest2.c) AS max +
+ FROM gstest2 +
+ GROUP BY ROLLUP((gstest2.a, gstest2.b, gstest2.c), (gstest2.c, gstest2.d));
+(1 row)
+
+-- Nested queries with 3 or more levels of nesting
+select(select (select grouping(a,b) from (values (1)) v2(c)) from (values (1,2)) v1(a,b) group by (a,b)) from (values(6,7)) v3(e,f) GROUP BY ROLLUP(e,f);
+ grouping
+----------
+ 0
+ 0
+ 0
+(3 rows)
+
+select(select (select grouping(e,f) from (values (1)) v2(c)) from (values (1,2)) v1(a,b) group by (a,b)) from (values(6,7)) v3(e,f) GROUP BY ROLLUP(e,f);
+ grouping
+----------
+ 0
+ 1
+ 3
+(3 rows)
+
+select(select (select grouping(c) from (values (1)) v2(c) GROUP BY c) from (values (1,2)) v1(a,b) group by (a,b)) from (values(6,7)) v3(e,f) GROUP BY ROLLUP(e,f);
+ grouping
+----------
+ 0
+ 0
+ 0
+(3 rows)
+
+-- Combinations of operations
+select a, b, c, d from gstest2 group by rollup(a,b),grouping sets(c,d);
+ a | b | c | d
+---+---+---+---
+ 1 | 1 | 1 |
+ 1 | | 1 |
+ | | 1 |
+ 1 | 1 | 2 |
+ 1 | 2 | 2 |
+ 1 | | 2 |
+ 2 | 2 | 2 |
+ 2 | | 2 |
+ | | 2 |
+ 1 | 1 | | 1
+ 1 | | | 1
+ | | | 1
+ 1 | 1 | | 2
+ 1 | 2 | | 2
+ 1 | | | 2
+ 2 | 2 | | 2
+ 2 | | | 2
+ | | | 2
+(18 rows)
+
+select a, b from (values (1,2),(2,3)) v(a,b) group by a,b, grouping sets(a);
+ a | b
+---+---
+ 1 | 2
+ 2 | 3
+(2 rows)
+
+-- Tests for chained aggregates
+select a, b, grouping(a,b), sum(v), count(*), max(v)
+ from gstest1 group by grouping sets ((a,b),(a+1,b+1),(a+2,b+2)) order by 3,6;
+ a | b | grouping | sum | count | max
+---+---+----------+-----+-------+-----
+ 1 | 1 | 0 | 21 | 2 | 11
+ 1 | 2 | 0 | 25 | 2 | 13
+ 1 | 3 | 0 | 14 | 1 | 14
+ 2 | 3 | 0 | 15 | 1 | 15
+ 3 | 3 | 0 | 16 | 1 | 16
+ 3 | 4 | 0 | 17 | 1 | 17
+ 4 | 1 | 0 | 37 | 2 | 19
+ | | 3 | 21 | 2 | 11
+ | | 3 | 21 | 2 | 11
+ | | 3 | 25 | 2 | 13
+ | | 3 | 25 | 2 | 13
+ | | 3 | 14 | 1 | 14
+ | | 3 | 14 | 1 | 14
+ | | 3 | 15 | 1 | 15
+ | | 3 | 15 | 1 | 15
+ | | 3 | 16 | 1 | 16
+ | | 3 | 16 | 1 | 16
+ | | 3 | 17 | 1 | 17
+ | | 3 | 17 | 1 | 17
+ | | 3 | 37 | 2 | 19
+ | | 3 | 37 | 2 | 19
+(21 rows)
+
+select(select (select grouping(a,b) from (values (1)) v2(c)) from (values (1,2)) v1(a,b) group by (a,b)) from (values(6,7)) v3(e,f) GROUP BY ROLLUP((e+1),(f+1));
+ grouping
+----------
+ 0
+ 0
+ 0
+(3 rows)
+
+select(select (select grouping(a,b) from (values (1)) v2(c)) from (values (1,2)) v1(a,b) group by (a,b)) from (values(6,7)) v3(e,f) GROUP BY CUBE((e+1),(f+1)) ORDER BY (e+1),(f+1);
+ grouping
+----------
+ 0
+ 0
+ 0
+ 0
+(4 rows)
+
+select a, b, sum(c), sum(sum(c)) over (order by a,b) as rsum
+ from gstest2 group by cube (a,b) order by rsum, a, b;
+ a | b | sum | rsum
+---+---+-----+------
+ 1 | 1 | 8 | 8
+ 1 | 2 | 2 | 10
+ 1 | | 10 | 20
+ 2 | 2 | 2 | 22
+ 2 | | 2 | 24
+ | 1 | 8 | 32
+ | 2 | 4 | 36
+ | | 12 | 48
+(8 rows)
+
+select a, b, sum(c) from (values (1,1,10),(1,1,11),(1,2,12),(1,2,13),(1,3,14),(2,3,15),(3,3,16),(3,4,17),(4,1,18),(4,1,19)) v(a,b,c) group by rollup (a,b);
+ a | b | sum
+---+---+-----
+ 1 | 1 | 21
+ 1 | 2 | 25
+ 1 | 3 | 14
+ 1 | | 60
+ 2 | 3 | 15
+ 2 | | 15
+ 3 | 3 | 16
+ 3 | 4 | 17
+ 3 | | 33
+ 4 | 1 | 37
+ 4 | | 37
+ | | 145
+(12 rows)
+
+select a, b, sum(v.x)
+ from (values (1),(2)) v(x), gstest_data(v.x)
+ group by cube (a,b) order by a,b;
+ a | b | sum
+---+---+-----
+ 1 | 1 | 1
+ 1 | 2 | 1
+ 1 | 3 | 1
+ 1 | | 3
+ 2 | 1 | 2
+ 2 | 2 | 2
+ 2 | 3 | 2
+ 2 | | 6
+ | 1 | 3
+ | 2 | 3
+ | 3 | 3
+ | | 9
+(12 rows)
+
+-- Test reordering of grouping sets
+explain (costs off)
+select * from gstest1 group by grouping sets((a,b,v),(v)) order by v,b,a;
+ QUERY PLAN
+------------------------------------------------------------------------------
+ GroupAggregate
+ Group Key: "*VALUES*".column3, "*VALUES*".column2, "*VALUES*".column1
+ Group Key: "*VALUES*".column3
+ -> Sort
+ Sort Key: "*VALUES*".column3, "*VALUES*".column2, "*VALUES*".column1
+ -> Values Scan on "*VALUES*"
+(6 rows)
+
+-- Agg level check. This query should error out.
+select (select grouping(a,b) from gstest2) from gstest2 group by a,b;
+ERROR: arguments to GROUPING must be grouping expressions of the associated query level
+LINE 1: select (select grouping(a,b) from gstest2) from gstest2 grou...
+ ^
+--Nested queries
+select a, b, sum(c), count(*) from gstest2 group by grouping sets (rollup(a,b),a);
+ a | b | sum | count
+---+---+-----+-------
+ 1 | 1 | 8 | 7
+ 1 | 2 | 2 | 1
+ 1 | | 10 | 8
+ 1 | | 10 | 8
+ 2 | 2 | 2 | 1
+ 2 | | 2 | 1
+ 2 | | 2 | 1
+ | | 12 | 9
+(8 rows)
+
+-- HAVING queries
+select ten, sum(distinct four) from onek a
+group by grouping sets((ten,four),(ten))
+having exists (select 1 from onek b where sum(distinct a.four) = b.four);
+ ten | sum
+-----+-----
+ 0 | 0
+ 0 | 2
+ 0 | 2
+ 1 | 1
+ 1 | 3
+ 2 | 0
+ 2 | 2
+ 2 | 2
+ 3 | 1
+ 3 | 3
+ 4 | 0
+ 4 | 2
+ 4 | 2
+ 5 | 1
+ 5 | 3
+ 6 | 0
+ 6 | 2
+ 6 | 2
+ 7 | 1
+ 7 | 3
+ 8 | 0
+ 8 | 2
+ 8 | 2
+ 9 | 1
+ 9 | 3
+(25 rows)
+
+-- Tests around pushdown of HAVING clauses, partially testing against previous bugs
+select a,count(*) from gstest2 group by rollup(a) order by a;
+ a | count
+---+-------
+ 1 | 8
+ 2 | 1
+ | 9
+(3 rows)
+
+select a,count(*) from gstest2 group by rollup(a) having a is distinct from 1 order by a;
+ a | count
+---+-------
+ 2 | 1
+ | 9
+(2 rows)
+
+explain (costs off)
+ select a,count(*) from gstest2 group by rollup(a) having a is distinct from 1 order by a;
+ QUERY PLAN
+----------------------------------
+ GroupAggregate
+ Group Key: a
+ Group Key: ()
+ Filter: (a IS DISTINCT FROM 1)
+ -> Sort
+ Sort Key: a
+ -> Seq Scan on gstest2
+(7 rows)
+
+select v.c, (select count(*) from gstest2 group by () having v.c)
+ from (values (false),(true)) v(c) order by v.c;
+ c | count
+---+-------
+ f |
+ t | 9
+(2 rows)
+
+explain (costs off)
+ select v.c, (select count(*) from gstest2 group by () having v.c)
+ from (values (false),(true)) v(c) order by v.c;
+ QUERY PLAN
+-----------------------------------------------------------
+ Sort
+ Sort Key: "*VALUES*".column1
+ -> Values Scan on "*VALUES*"
+ SubPlan 1
+ -> Aggregate
+ Group Key: ()
+ Filter: "*VALUES*".column1
+ -> Result
+ One-Time Filter: "*VALUES*".column1
+ -> Seq Scan on gstest2
+(10 rows)
+
+-- HAVING with GROUPING queries
+select ten, grouping(ten) from onek
+group by grouping sets(ten) having grouping(ten) >= 0
+order by 2,1;
+ ten | grouping
+-----+----------
+ 0 | 0
+ 1 | 0
+ 2 | 0
+ 3 | 0
+ 4 | 0
+ 5 | 0
+ 6 | 0
+ 7 | 0
+ 8 | 0
+ 9 | 0
+(10 rows)
+
+select ten, grouping(ten) from onek
+group by grouping sets(ten, four) having grouping(ten) > 0
+order by 2,1;
+ ten | grouping
+-----+----------
+ | 1
+ | 1
+ | 1
+ | 1
+(4 rows)
+
+select ten, grouping(ten) from onek
+group by rollup(ten) having grouping(ten) > 0
+order by 2,1;
+ ten | grouping
+-----+----------
+ | 1
+(1 row)
+
+select ten, grouping(ten) from onek
+group by cube(ten) having grouping(ten) > 0
+order by 2,1;
+ ten | grouping
+-----+----------
+ | 1
+(1 row)
+
+select ten, grouping(ten) from onek
+group by (ten) having grouping(ten) >= 0
+order by 2,1;
+ ten | grouping
+-----+----------
+ 0 | 0
+ 1 | 0
+ 2 | 0
+ 3 | 0
+ 4 | 0
+ 5 | 0
+ 6 | 0
+ 7 | 0
+ 8 | 0
+ 9 | 0
+(10 rows)
+
+-- FILTER queries
+select ten, sum(distinct four) filter (where four::text ~ '123') from onek a
+group by rollup(ten);
+ ten | sum
+-----+-----
+ 0 |
+ 1 |
+ 2 |
+ 3 |
+ 4 |
+ 5 |
+ 6 |
+ 7 |
+ 8 |
+ 9 |
+ |
+(11 rows)
+
+-- More rescan tests
+select * from (values (1),(2)) v(a) left join lateral (select v.a, four, ten, count(*) from onek group by cube(four,ten)) s on true order by v.a,four,ten;
+ a | a | four | ten | count
+---+---+------+-----+-------
+ 1 | 1 | 0 | 0 | 50
+ 1 | 1 | 0 | 2 | 50
+ 1 | 1 | 0 | 4 | 50
+ 1 | 1 | 0 | 6 | 50
+ 1 | 1 | 0 | 8 | 50
+ 1 | 1 | 0 | | 250
+ 1 | 1 | 1 | 1 | 50
+ 1 | 1 | 1 | 3 | 50
+ 1 | 1 | 1 | 5 | 50
+ 1 | 1 | 1 | 7 | 50
+ 1 | 1 | 1 | 9 | 50
+ 1 | 1 | 1 | | 250
+ 1 | 1 | 2 | 0 | 50
+ 1 | 1 | 2 | 2 | 50
+ 1 | 1 | 2 | 4 | 50
+ 1 | 1 | 2 | 6 | 50
+ 1 | 1 | 2 | 8 | 50
+ 1 | 1 | 2 | | 250
+ 1 | 1 | 3 | 1 | 50
+ 1 | 1 | 3 | 3 | 50
+ 1 | 1 | 3 | 5 | 50
+ 1 | 1 | 3 | 7 | 50
+ 1 | 1 | 3 | 9 | 50
+ 1 | 1 | 3 | | 250
+ 1 | 1 | | 0 | 100
+ 1 | 1 | | 1 | 100
+ 1 | 1 | | 2 | 100
+ 1 | 1 | | 3 | 100
+ 1 | 1 | | 4 | 100
+ 1 | 1 | | 5 | 100
+ 1 | 1 | | 6 | 100
+ 1 | 1 | | 7 | 100
+ 1 | 1 | | 8 | 100
+ 1 | 1 | | 9 | 100
+ 1 | 1 | | | 1000
+ 2 | 2 | 0 | 0 | 50
+ 2 | 2 | 0 | 2 | 50
+ 2 | 2 | 0 | 4 | 50
+ 2 | 2 | 0 | 6 | 50
+ 2 | 2 | 0 | 8 | 50
+ 2 | 2 | 0 | | 250
+ 2 | 2 | 1 | 1 | 50
+ 2 | 2 | 1 | 3 | 50
+ 2 | 2 | 1 | 5 | 50
+ 2 | 2 | 1 | 7 | 50
+ 2 | 2 | 1 | 9 | 50
+ 2 | 2 | 1 | | 250
+ 2 | 2 | 2 | 0 | 50
+ 2 | 2 | 2 | 2 | 50
+ 2 | 2 | 2 | 4 | 50
+ 2 | 2 | 2 | 6 | 50
+ 2 | 2 | 2 | 8 | 50
+ 2 | 2 | 2 | | 250
+ 2 | 2 | 3 | 1 | 50
+ 2 | 2 | 3 | 3 | 50
+ 2 | 2 | 3 | 5 | 50
+ 2 | 2 | 3 | 7 | 50
+ 2 | 2 | 3 | 9 | 50
+ 2 | 2 | 3 | | 250
+ 2 | 2 | | 0 | 100
+ 2 | 2 | | 1 | 100
+ 2 | 2 | | 2 | 100
+ 2 | 2 | | 3 | 100
+ 2 | 2 | | 4 | 100
+ 2 | 2 | | 5 | 100
+ 2 | 2 | | 6 | 100
+ 2 | 2 | | 7 | 100
+ 2 | 2 | | 8 | 100
+ 2 | 2 | | 9 | 100
+ 2 | 2 | | | 1000
+(70 rows)
+
+select array(select row(v.a,s1.*) from (select two,four, count(*) from onek group by cube(two,four) order by two,four) s1) from (values (1),(2)) v(a);
+ array
+------------------------------------------------------------------------------------------------------------------------------------------------------
+ {"(1,0,0,250)","(1,0,2,250)","(1,0,,500)","(1,1,1,250)","(1,1,3,250)","(1,1,,500)","(1,,0,250)","(1,,1,250)","(1,,2,250)","(1,,3,250)","(1,,,1000)"}
+ {"(2,0,0,250)","(2,0,2,250)","(2,0,,500)","(2,1,1,250)","(2,1,3,250)","(2,1,,500)","(2,,0,250)","(2,,1,250)","(2,,2,250)","(2,,3,250)","(2,,,1000)"}
+(2 rows)
+
+-- Grouping on text columns
+select sum(ten) from onek group by two, rollup(four::text) order by 1;
+ sum
+------
+ 1000
+ 1000
+ 1250
+ 1250
+ 2000
+ 2500
+(6 rows)
+
+select sum(ten) from onek group by rollup(four::text), two order by 1;
+ sum
+------
+ 1000
+ 1000
+ 1250
+ 1250
+ 2000
+ 2500
+(6 rows)
+
+-- hashing support
+set enable_hashagg = true;
+-- failure cases
+select count(*) from gstest4 group by rollup(unhashable_col,unsortable_col);
+ERROR: could not implement GROUP BY
+DETAIL: Some of the datatypes only support hashing, while others only support sorting.
+select array_agg(v order by v) from gstest4 group by grouping sets ((id,unsortable_col),(id));
+ERROR: could not implement GROUP BY
+DETAIL: Some of the datatypes only support hashing, while others only support sorting.
+-- simple cases
+select a, b, grouping(a,b), sum(v), count(*), max(v)
+ from gstest1 group by grouping sets ((a),(b)) order by 3,1,2;
+ a | b | grouping | sum | count | max
+---+---+----------+-----+-------+-----
+ 1 | | 1 | 60 | 5 | 14
+ 2 | | 1 | 15 | 1 | 15
+ 3 | | 1 | 33 | 2 | 17
+ 4 | | 1 | 37 | 2 | 19
+ | 1 | 2 | 58 | 4 | 19
+ | 2 | 2 | 25 | 2 | 13
+ | 3 | 2 | 45 | 3 | 16
+ | 4 | 2 | 17 | 1 | 17
+(8 rows)
+
+explain (costs off) select a, b, grouping(a,b), sum(v), count(*), max(v)
+ from gstest1 group by grouping sets ((a),(b)) order by 3,1,2;
+ QUERY PLAN
+--------------------------------------------------------------------------------------------------------
+ Sort
+ Sort Key: (GROUPING("*VALUES*".column1, "*VALUES*".column2)), "*VALUES*".column1, "*VALUES*".column2
+ -> HashAggregate
+ Hash Key: "*VALUES*".column1
+ Hash Key: "*VALUES*".column2
+ -> Values Scan on "*VALUES*"
+(6 rows)
+
+select a, b, grouping(a,b), sum(v), count(*), max(v)
+ from gstest1 group by cube(a,b) order by 3,1,2;
+ a | b | grouping | sum | count | max
+---+---+----------+-----+-------+-----
+ 1 | 1 | 0 | 21 | 2 | 11
+ 1 | 2 | 0 | 25 | 2 | 13
+ 1 | 3 | 0 | 14 | 1 | 14
+ 2 | 3 | 0 | 15 | 1 | 15
+ 3 | 3 | 0 | 16 | 1 | 16
+ 3 | 4 | 0 | 17 | 1 | 17
+ 4 | 1 | 0 | 37 | 2 | 19
+ 1 | | 1 | 60 | 5 | 14
+ 2 | | 1 | 15 | 1 | 15
+ 3 | | 1 | 33 | 2 | 17
+ 4 | | 1 | 37 | 2 | 19
+ | 1 | 2 | 58 | 4 | 19
+ | 2 | 2 | 25 | 2 | 13
+ | 3 | 2 | 45 | 3 | 16
+ | 4 | 2 | 17 | 1 | 17
+ | | 3 | 145 | 10 | 19
+(16 rows)
+
+explain (costs off) select a, b, grouping(a,b), sum(v), count(*), max(v)
+ from gstest1 group by cube(a,b) order by 3,1,2;
+ QUERY PLAN
+--------------------------------------------------------------------------------------------------------
+ Sort
+ Sort Key: (GROUPING("*VALUES*".column1, "*VALUES*".column2)), "*VALUES*".column1, "*VALUES*".column2
+ -> MixedAggregate
+ Hash Key: "*VALUES*".column1, "*VALUES*".column2
+ Hash Key: "*VALUES*".column1
+ Hash Key: "*VALUES*".column2
+ Group Key: ()
+ -> Values Scan on "*VALUES*"
+(8 rows)
+
+-- shouldn't try and hash
+explain (costs off)
+ select a, b, grouping(a,b), array_agg(v order by v)
+ from gstest1 group by cube(a,b);
+ QUERY PLAN
+----------------------------------------------------------
+ GroupAggregate
+ Group Key: "*VALUES*".column1, "*VALUES*".column2
+ Group Key: "*VALUES*".column1
+ Group Key: ()
+ Sort Key: "*VALUES*".column2
+ Group Key: "*VALUES*".column2
+ -> Sort
+ Sort Key: "*VALUES*".column1, "*VALUES*".column2
+ -> Values Scan on "*VALUES*"
+(9 rows)
+
+-- unsortable cases
+select unsortable_col, count(*)
+ from gstest4 group by grouping sets ((unsortable_col),(unsortable_col))
+ order by unsortable_col::text;
+ unsortable_col | count
+----------------+-------
+ 1 | 4
+ 1 | 4
+ 2 | 4
+ 2 | 4
+(4 rows)
+
+-- mixed hashable/sortable cases
+select unhashable_col, unsortable_col,
+ grouping(unhashable_col, unsortable_col),
+ count(*), sum(v)
+ from gstest4 group by grouping sets ((unhashable_col),(unsortable_col))
+ order by 3, 5;
+ unhashable_col | unsortable_col | grouping | count | sum
+----------------+----------------+----------+-------+-----
+ 0000 | | 1 | 2 | 17
+ 0001 | | 1 | 2 | 34
+ 0010 | | 1 | 2 | 68
+ 0011 | | 1 | 2 | 136
+ | 2 | 2 | 4 | 60
+ | 1 | 2 | 4 | 195
+(6 rows)
+
+explain (costs off)
+ select unhashable_col, unsortable_col,
+ grouping(unhashable_col, unsortable_col),
+ count(*), sum(v)
+ from gstest4 group by grouping sets ((unhashable_col),(unsortable_col))
+ order by 3,5;
+ QUERY PLAN
+------------------------------------------------------------------
+ Sort
+ Sort Key: (GROUPING(unhashable_col, unsortable_col)), (sum(v))
+ -> MixedAggregate
+ Hash Key: unsortable_col
+ Group Key: unhashable_col
+ -> Sort
+ Sort Key: unhashable_col
+ -> Seq Scan on gstest4
+(8 rows)
+
+select unhashable_col, unsortable_col,
+ grouping(unhashable_col, unsortable_col),
+ count(*), sum(v)
+ from gstest4 group by grouping sets ((v,unhashable_col),(v,unsortable_col))
+ order by 3,5;
+ unhashable_col | unsortable_col | grouping | count | sum
+----------------+----------------+----------+-------+-----
+ 0000 | | 1 | 1 | 1
+ 0001 | | 1 | 1 | 2
+ 0010 | | 1 | 1 | 4
+ 0011 | | 1 | 1 | 8
+ 0000 | | 1 | 1 | 16
+ 0001 | | 1 | 1 | 32
+ 0010 | | 1 | 1 | 64
+ 0011 | | 1 | 1 | 128
+ | 1 | 2 | 1 | 1
+ | 1 | 2 | 1 | 2
+ | 2 | 2 | 1 | 4
+ | 2 | 2 | 1 | 8
+ | 2 | 2 | 1 | 16
+ | 2 | 2 | 1 | 32
+ | 1 | 2 | 1 | 64
+ | 1 | 2 | 1 | 128
+(16 rows)
+
+explain (costs off)
+ select unhashable_col, unsortable_col,
+ grouping(unhashable_col, unsortable_col),
+ count(*), sum(v)
+ from gstest4 group by grouping sets ((v,unhashable_col),(v,unsortable_col))
+ order by 3,5;
+ QUERY PLAN
+------------------------------------------------------------------
+ Sort
+ Sort Key: (GROUPING(unhashable_col, unsortable_col)), (sum(v))
+ -> MixedAggregate
+ Hash Key: v, unsortable_col
+ Group Key: v, unhashable_col
+ -> Sort
+ Sort Key: v, unhashable_col
+ -> Seq Scan on gstest4
+(8 rows)
+
+-- empty input: first is 0 rows, second 1, third 3 etc.
+select a, b, sum(v), count(*) from gstest_empty group by grouping sets ((a,b),a);
+ a | b | sum | count
+---+---+-----+-------
+(0 rows)
+
+explain (costs off)
+ select a, b, sum(v), count(*) from gstest_empty group by grouping sets ((a,b),a);
+ QUERY PLAN
+--------------------------------
+ HashAggregate
+ Hash Key: a, b
+ Hash Key: a
+ -> Seq Scan on gstest_empty
+(4 rows)
+
+select a, b, sum(v), count(*) from gstest_empty group by grouping sets ((a,b),());
+ a | b | sum | count
+---+---+-----+-------
+ | | | 0
+(1 row)
+
+select a, b, sum(v), count(*) from gstest_empty group by grouping sets ((a,b),(),(),());
+ a | b | sum | count
+---+---+-----+-------
+ | | | 0
+ | | | 0
+ | | | 0
+(3 rows)
+
+explain (costs off)
+ select a, b, sum(v), count(*) from gstest_empty group by grouping sets ((a,b),(),(),());
+ QUERY PLAN
+--------------------------------
+ MixedAggregate
+ Hash Key: a, b
+ Group Key: ()
+ Group Key: ()
+ Group Key: ()
+ -> Seq Scan on gstest_empty
+(6 rows)
+
+select sum(v), count(*) from gstest_empty group by grouping sets ((),(),());
+ sum | count
+-----+-------
+ | 0
+ | 0
+ | 0
+(3 rows)
+
+explain (costs off)
+ select sum(v), count(*) from gstest_empty group by grouping sets ((),(),());
+ QUERY PLAN
+--------------------------------
+ Aggregate
+ Group Key: ()
+ Group Key: ()
+ Group Key: ()
+ -> Seq Scan on gstest_empty
+(5 rows)
+
+-- check that functionally dependent cols are not nulled
+select a, d, grouping(a,b,c)
+ from gstest3
+ group by grouping sets ((a,b), (a,c));
+ a | d | grouping
+---+---+----------
+ 1 | 1 | 1
+ 2 | 2 | 1
+ 1 | 1 | 2
+ 2 | 2 | 2
+(4 rows)
+
+explain (costs off)
+ select a, d, grouping(a,b,c)
+ from gstest3
+ group by grouping sets ((a,b), (a,c));
+ QUERY PLAN
+---------------------------
+ HashAggregate
+ Hash Key: a, b
+ Hash Key: a, c
+ -> Seq Scan on gstest3
+(4 rows)
+
+-- simple rescan tests
+select a, b, sum(v.x)
+ from (values (1),(2)) v(x), gstest_data(v.x)
+ group by grouping sets (a,b)
+ order by 1, 2, 3;
+ a | b | sum
+---+---+-----
+ 1 | | 3
+ 2 | | 6
+ | 1 | 3
+ | 2 | 3
+ | 3 | 3
+(5 rows)
+
+explain (costs off)
+ select a, b, sum(v.x)
+ from (values (1),(2)) v(x), gstest_data(v.x)
+ group by grouping sets (a,b)
+ order by 3, 1, 2;
+ QUERY PLAN
+---------------------------------------------------------------------
+ Sort
+ Sort Key: (sum("*VALUES*".column1)), gstest_data.a, gstest_data.b
+ -> HashAggregate
+ Hash Key: gstest_data.a
+ Hash Key: gstest_data.b
+ -> Nested Loop
+ -> Values Scan on "*VALUES*"
+ -> Function Scan on gstest_data
+(8 rows)
+
+select *
+ from (values (1),(2)) v(x),
+ lateral (select a, b, sum(v.x) from gstest_data(v.x) group by grouping sets (a,b)) s;
+ERROR: aggregate functions are not allowed in FROM clause of their own query level
+LINE 3: lateral (select a, b, sum(v.x) from gstest_data(v.x) ...
+ ^
+explain (costs off)
+ select *
+ from (values (1),(2)) v(x),
+ lateral (select a, b, sum(v.x) from gstest_data(v.x) group by grouping sets (a,b)) s;
+ERROR: aggregate functions are not allowed in FROM clause of their own query level
+LINE 4: lateral (select a, b, sum(v.x) from gstest_data(v.x...
+ ^
+-- Tests for chained aggregates
+select a, b, grouping(a,b), sum(v), count(*), max(v)
+ from gstest1 group by grouping sets ((a,b),(a+1,b+1),(a+2,b+2)) order by 3,6;
+ a | b | grouping | sum | count | max
+---+---+----------+-----+-------+-----
+ 1 | 1 | 0 | 21 | 2 | 11
+ 1 | 2 | 0 | 25 | 2 | 13
+ 1 | 3 | 0 | 14 | 1 | 14
+ 2 | 3 | 0 | 15 | 1 | 15
+ 3 | 3 | 0 | 16 | 1 | 16
+ 3 | 4 | 0 | 17 | 1 | 17
+ 4 | 1 | 0 | 37 | 2 | 19
+ | | 3 | 21 | 2 | 11
+ | | 3 | 21 | 2 | 11
+ | | 3 | 25 | 2 | 13
+ | | 3 | 25 | 2 | 13
+ | | 3 | 14 | 1 | 14
+ | | 3 | 14 | 1 | 14
+ | | 3 | 15 | 1 | 15
+ | | 3 | 15 | 1 | 15
+ | | 3 | 16 | 1 | 16
+ | | 3 | 16 | 1 | 16
+ | | 3 | 17 | 1 | 17
+ | | 3 | 17 | 1 | 17
+ | | 3 | 37 | 2 | 19
+ | | 3 | 37 | 2 | 19
+(21 rows)
+
+explain (costs off)
+ select a, b, grouping(a,b), sum(v), count(*), max(v)
+ from gstest1 group by grouping sets ((a,b),(a+1,b+1),(a+2,b+2)) order by 3,6;
+ QUERY PLAN
+-------------------------------------------------------------------------------------------
+ Sort
+ Sort Key: (GROUPING("*VALUES*".column1, "*VALUES*".column2)), (max("*VALUES*".column3))
+ -> HashAggregate
+ Hash Key: "*VALUES*".column1, "*VALUES*".column2
+ Hash Key: ("*VALUES*".column1 + 1), ("*VALUES*".column2 + 1)
+ Hash Key: ("*VALUES*".column1 + 2), ("*VALUES*".column2 + 2)
+ -> Values Scan on "*VALUES*"
+(7 rows)
+
+select a, b, sum(c), sum(sum(c)) over (order by a,b) as rsum
+ from gstest2 group by cube (a,b) order by rsum, a, b;
+ a | b | sum | rsum
+---+---+-----+------
+ 1 | 1 | 8 | 8
+ 1 | 2 | 2 | 10
+ 1 | | 10 | 20
+ 2 | 2 | 2 | 22
+ 2 | | 2 | 24
+ | 1 | 8 | 32
+ | 2 | 4 | 36
+ | | 12 | 48
+(8 rows)
+
+explain (costs off)
+ select a, b, sum(c), sum(sum(c)) over (order by a,b) as rsum
+ from gstest2 group by cube (a,b) order by rsum, a, b;
+ QUERY PLAN
+---------------------------------------------
+ Sort
+ Sort Key: (sum((sum(c))) OVER (?)), a, b
+ -> WindowAgg
+ -> Sort
+ Sort Key: a, b
+ -> MixedAggregate
+ Hash Key: a, b
+ Hash Key: a
+ Hash Key: b
+ Group Key: ()
+ -> Seq Scan on gstest2
+(11 rows)
+
+select a, b, sum(v.x)
+ from (values (1),(2)) v(x), gstest_data(v.x)
+ group by cube (a,b) order by a,b;
+ a | b | sum
+---+---+-----
+ 1 | 1 | 1
+ 1 | 2 | 1
+ 1 | 3 | 1
+ 1 | | 3
+ 2 | 1 | 2
+ 2 | 2 | 2
+ 2 | 3 | 2
+ 2 | | 6
+ | 1 | 3
+ | 2 | 3
+ | 3 | 3
+ | | 9
+(12 rows)
+
+explain (costs off)
+ select a, b, sum(v.x)
+ from (values (1),(2)) v(x), gstest_data(v.x)
+ group by cube (a,b) order by a,b;
+ QUERY PLAN
+------------------------------------------------
+ Sort
+ Sort Key: gstest_data.a, gstest_data.b
+ -> MixedAggregate
+ Hash Key: gstest_data.a, gstest_data.b
+ Hash Key: gstest_data.a
+ Hash Key: gstest_data.b
+ Group Key: ()
+ -> Nested Loop
+ -> Values Scan on "*VALUES*"
+ -> Function Scan on gstest_data
+(10 rows)
+
+-- Verify that we correctly handle the child node returning a
+-- non-minimal slot, which happens if the input is pre-sorted,
+-- e.g. due to an index scan.
+BEGIN;
+SET LOCAL enable_hashagg = false;
+EXPLAIN (COSTS OFF) SELECT a, b, count(*), max(a), max(b) FROM gstest3 GROUP BY GROUPING SETS(a, b,()) ORDER BY a, b;
+ QUERY PLAN
+---------------------------------------
+ Sort
+ Sort Key: a, b
+ -> GroupAggregate
+ Group Key: a
+ Group Key: ()
+ Sort Key: b
+ Group Key: b
+ -> Sort
+ Sort Key: a
+ -> Seq Scan on gstest3
+(10 rows)
+
+SELECT a, b, count(*), max(a), max(b) FROM gstest3 GROUP BY GROUPING SETS(a, b,()) ORDER BY a, b;
+ a | b | count | max | max
+---+---+-------+-----+-----
+ 1 | | 1 | 1 | 1
+ 2 | | 1 | 2 | 2
+ | 1 | 1 | 1 | 1
+ | 2 | 1 | 2 | 2
+ | | 2 | 2 | 2
+(5 rows)
+
+SET LOCAL enable_seqscan = false;
+EXPLAIN (COSTS OFF) SELECT a, b, count(*), max(a), max(b) FROM gstest3 GROUP BY GROUPING SETS(a, b,()) ORDER BY a, b;
+ QUERY PLAN
+------------------------------------------------------
+ Sort
+ Sort Key: a, b
+ -> GroupAggregate
+ Group Key: a
+ Group Key: ()
+ Sort Key: b
+ Group Key: b
+ -> Index Scan using gstest3_pkey on gstest3
+(8 rows)
+
+SELECT a, b, count(*), max(a), max(b) FROM gstest3 GROUP BY GROUPING SETS(a, b,()) ORDER BY a, b;
+ a | b | count | max | max
+---+---+-------+-----+-----
+ 1 | | 1 | 1 | 1
+ 2 | | 1 | 2 | 2
+ | 1 | 1 | 1 | 1
+ | 2 | 1 | 2 | 2
+ | | 2 | 2 | 2
+(5 rows)
+
+COMMIT;
+-- More rescan tests
+select * from (values (1),(2)) v(a) left join lateral (select v.a, four, ten, count(*) from onek group by cube(four,ten)) s on true order by v.a,four,ten;
+ a | a | four | ten | count
+---+---+------+-----+-------
+ 1 | 1 | 0 | 0 | 50
+ 1 | 1 | 0 | 2 | 50
+ 1 | 1 | 0 | 4 | 50
+ 1 | 1 | 0 | 6 | 50
+ 1 | 1 | 0 | 8 | 50
+ 1 | 1 | 0 | | 250
+ 1 | 1 | 1 | 1 | 50
+ 1 | 1 | 1 | 3 | 50
+ 1 | 1 | 1 | 5 | 50
+ 1 | 1 | 1 | 7 | 50
+ 1 | 1 | 1 | 9 | 50
+ 1 | 1 | 1 | | 250
+ 1 | 1 | 2 | 0 | 50
+ 1 | 1 | 2 | 2 | 50
+ 1 | 1 | 2 | 4 | 50
+ 1 | 1 | 2 | 6 | 50
+ 1 | 1 | 2 | 8 | 50
+ 1 | 1 | 2 | | 250
+ 1 | 1 | 3 | 1 | 50
+ 1 | 1 | 3 | 3 | 50
+ 1 | 1 | 3 | 5 | 50
+ 1 | 1 | 3 | 7 | 50
+ 1 | 1 | 3 | 9 | 50
+ 1 | 1 | 3 | | 250
+ 1 | 1 | | 0 | 100
+ 1 | 1 | | 1 | 100
+ 1 | 1 | | 2 | 100
+ 1 | 1 | | 3 | 100
+ 1 | 1 | | 4 | 100
+ 1 | 1 | | 5 | 100
+ 1 | 1 | | 6 | 100
+ 1 | 1 | | 7 | 100
+ 1 | 1 | | 8 | 100
+ 1 | 1 | | 9 | 100
+ 1 | 1 | | | 1000
+ 2 | 2 | 0 | 0 | 50
+ 2 | 2 | 0 | 2 | 50
+ 2 | 2 | 0 | 4 | 50
+ 2 | 2 | 0 | 6 | 50
+ 2 | 2 | 0 | 8 | 50
+ 2 | 2 | 0 | | 250
+ 2 | 2 | 1 | 1 | 50
+ 2 | 2 | 1 | 3 | 50
+ 2 | 2 | 1 | 5 | 50
+ 2 | 2 | 1 | 7 | 50
+ 2 | 2 | 1 | 9 | 50
+ 2 | 2 | 1 | | 250
+ 2 | 2 | 2 | 0 | 50
+ 2 | 2 | 2 | 2 | 50
+ 2 | 2 | 2 | 4 | 50
+ 2 | 2 | 2 | 6 | 50
+ 2 | 2 | 2 | 8 | 50
+ 2 | 2 | 2 | | 250
+ 2 | 2 | 3 | 1 | 50
+ 2 | 2 | 3 | 3 | 50
+ 2 | 2 | 3 | 5 | 50
+ 2 | 2 | 3 | 7 | 50
+ 2 | 2 | 3 | 9 | 50
+ 2 | 2 | 3 | | 250
+ 2 | 2 | | 0 | 100
+ 2 | 2 | | 1 | 100
+ 2 | 2 | | 2 | 100
+ 2 | 2 | | 3 | 100
+ 2 | 2 | | 4 | 100
+ 2 | 2 | | 5 | 100
+ 2 | 2 | | 6 | 100
+ 2 | 2 | | 7 | 100
+ 2 | 2 | | 8 | 100
+ 2 | 2 | | 9 | 100
+ 2 | 2 | | | 1000
+(70 rows)
+
+select array(select row(v.a,s1.*) from (select two,four, count(*) from onek group by cube(two,four) order by two,four) s1) from (values (1),(2)) v(a);
+ array
+------------------------------------------------------------------------------------------------------------------------------------------------------
+ {"(1,0,0,250)","(1,0,2,250)","(1,0,,500)","(1,1,1,250)","(1,1,3,250)","(1,1,,500)","(1,,0,250)","(1,,1,250)","(1,,2,250)","(1,,3,250)","(1,,,1000)"}
+ {"(2,0,0,250)","(2,0,2,250)","(2,0,,500)","(2,1,1,250)","(2,1,3,250)","(2,1,,500)","(2,,0,250)","(2,,1,250)","(2,,2,250)","(2,,3,250)","(2,,,1000)"}
+(2 rows)
+
+-- Rescan logic changes when there are no empty grouping sets, so test
+-- that too:
+select * from (values (1),(2)) v(a) left join lateral (select v.a, four, ten, count(*) from onek group by grouping sets(four,ten)) s on true order by v.a,four,ten;
+ a | a | four | ten | count
+---+---+------+-----+-------
+ 1 | 1 | 0 | | 250
+ 1 | 1 | 1 | | 250
+ 1 | 1 | 2 | | 250
+ 1 | 1 | 3 | | 250
+ 1 | 1 | | 0 | 100
+ 1 | 1 | | 1 | 100
+ 1 | 1 | | 2 | 100
+ 1 | 1 | | 3 | 100
+ 1 | 1 | | 4 | 100
+ 1 | 1 | | 5 | 100
+ 1 | 1 | | 6 | 100
+ 1 | 1 | | 7 | 100
+ 1 | 1 | | 8 | 100
+ 1 | 1 | | 9 | 100
+ 2 | 2 | 0 | | 250
+ 2 | 2 | 1 | | 250
+ 2 | 2 | 2 | | 250
+ 2 | 2 | 3 | | 250
+ 2 | 2 | | 0 | 100
+ 2 | 2 | | 1 | 100
+ 2 | 2 | | 2 | 100
+ 2 | 2 | | 3 | 100
+ 2 | 2 | | 4 | 100
+ 2 | 2 | | 5 | 100
+ 2 | 2 | | 6 | 100
+ 2 | 2 | | 7 | 100
+ 2 | 2 | | 8 | 100
+ 2 | 2 | | 9 | 100
+(28 rows)
+
+select array(select row(v.a,s1.*) from (select two,four, count(*) from onek group by grouping sets(two,four) order by two,four) s1) from (values (1),(2)) v(a);
+ array
+---------------------------------------------------------------------------------
+ {"(1,0,,500)","(1,1,,500)","(1,,0,250)","(1,,1,250)","(1,,2,250)","(1,,3,250)"}
+ {"(2,0,,500)","(2,1,,500)","(2,,0,250)","(2,,1,250)","(2,,2,250)","(2,,3,250)"}
+(2 rows)
+
+-- test the knapsack
+set enable_indexscan = false;
+set hash_mem_multiplier = 1.0;
+set work_mem = '64kB';
+explain (costs off)
+ select unique1,
+ count(two), count(four), count(ten),
+ count(hundred), count(thousand), count(twothousand),
+ count(*)
+ from tenk1 group by grouping sets (unique1,twothousand,thousand,hundred,ten,four,two);
+ QUERY PLAN
+-------------------------------
+ MixedAggregate
+ Hash Key: two
+ Hash Key: four
+ Hash Key: ten
+ Hash Key: hundred
+ Group Key: unique1
+ Sort Key: twothousand
+ Group Key: twothousand
+ Sort Key: thousand
+ Group Key: thousand
+ -> Sort
+ Sort Key: unique1
+ -> Seq Scan on tenk1
+(13 rows)
+
+explain (costs off)
+ select unique1,
+ count(two), count(four), count(ten),
+ count(hundred), count(thousand), count(twothousand),
+ count(*)
+ from tenk1 group by grouping sets (unique1,hundred,ten,four,two);
+ QUERY PLAN
+-------------------------------
+ MixedAggregate
+ Hash Key: two
+ Hash Key: four
+ Hash Key: ten
+ Hash Key: hundred
+ Group Key: unique1
+ -> Sort
+ Sort Key: unique1
+ -> Seq Scan on tenk1
+(9 rows)
+
+set work_mem = '384kB';
+explain (costs off)
+ select unique1,
+ count(two), count(four), count(ten),
+ count(hundred), count(thousand), count(twothousand),
+ count(*)
+ from tenk1 group by grouping sets (unique1,twothousand,thousand,hundred,ten,four,two);
+ QUERY PLAN
+-------------------------------
+ MixedAggregate
+ Hash Key: two
+ Hash Key: four
+ Hash Key: ten
+ Hash Key: hundred
+ Hash Key: thousand
+ Group Key: unique1
+ Sort Key: twothousand
+ Group Key: twothousand
+ -> Sort
+ Sort Key: unique1
+ -> Seq Scan on tenk1
+(12 rows)
+
+-- check collation-sensitive matching between grouping expressions
+-- (similar to a check for aggregates, but there are additional code
+-- paths for GROUPING, so check again here)
+select v||'a', case grouping(v||'a') when 1 then 1 else 0 end, count(*)
+ from unnest(array[1,1], array['a','b']) u(i,v)
+ group by rollup(i, v||'a') order by 1,3;
+ ?column? | case | count
+----------+------+-------
+ aa | 0 | 1
+ ba | 0 | 1
+ | 1 | 2
+ | 1 | 2
+(4 rows)
+
+select v||'a', case when grouping(v||'a') = 1 then 1 else 0 end, count(*)
+ from unnest(array[1,1], array['a','b']) u(i,v)
+ group by rollup(i, v||'a') order by 1,3;
+ ?column? | case | count
+----------+------+-------
+ aa | 0 | 1
+ ba | 0 | 1
+ | 1 | 2
+ | 1 | 2
+(4 rows)
+
+-- Bug #16784
+create table bug_16784(i int, j int);
+analyze bug_16784;
+alter table bug_16784 set (autovacuum_enabled = 'false');
+update pg_class set reltuples = 10 where relname='bug_16784';
+insert into bug_16784 select g/10, g from generate_series(1,40) g;
+set work_mem='64kB';
+set enable_sort = false;
+select * from
+ (values (1),(2)) v(a),
+ lateral (select a, i, j, count(*) from
+ bug_16784 group by cube(i,j)) s
+ order by v.a, i, j;
+ a | a | i | j | count
+---+---+---+----+-------
+ 1 | 1 | 0 | 1 | 1
+ 1 | 1 | 0 | 2 | 1
+ 1 | 1 | 0 | 3 | 1
+ 1 | 1 | 0 | 4 | 1
+ 1 | 1 | 0 | 5 | 1
+ 1 | 1 | 0 | 6 | 1
+ 1 | 1 | 0 | 7 | 1
+ 1 | 1 | 0 | 8 | 1
+ 1 | 1 | 0 | 9 | 1
+ 1 | 1 | 0 | | 9
+ 1 | 1 | 1 | 10 | 1
+ 1 | 1 | 1 | 11 | 1
+ 1 | 1 | 1 | 12 | 1
+ 1 | 1 | 1 | 13 | 1
+ 1 | 1 | 1 | 14 | 1
+ 1 | 1 | 1 | 15 | 1
+ 1 | 1 | 1 | 16 | 1
+ 1 | 1 | 1 | 17 | 1
+ 1 | 1 | 1 | 18 | 1
+ 1 | 1 | 1 | 19 | 1
+ 1 | 1 | 1 | | 10
+ 1 | 1 | 2 | 20 | 1
+ 1 | 1 | 2 | 21 | 1
+ 1 | 1 | 2 | 22 | 1
+ 1 | 1 | 2 | 23 | 1
+ 1 | 1 | 2 | 24 | 1
+ 1 | 1 | 2 | 25 | 1
+ 1 | 1 | 2 | 26 | 1
+ 1 | 1 | 2 | 27 | 1
+ 1 | 1 | 2 | 28 | 1
+ 1 | 1 | 2 | 29 | 1
+ 1 | 1 | 2 | | 10
+ 1 | 1 | 3 | 30 | 1
+ 1 | 1 | 3 | 31 | 1
+ 1 | 1 | 3 | 32 | 1
+ 1 | 1 | 3 | 33 | 1
+ 1 | 1 | 3 | 34 | 1
+ 1 | 1 | 3 | 35 | 1
+ 1 | 1 | 3 | 36 | 1
+ 1 | 1 | 3 | 37 | 1
+ 1 | 1 | 3 | 38 | 1
+ 1 | 1 | 3 | 39 | 1
+ 1 | 1 | 3 | | 10
+ 1 | 1 | 4 | 40 | 1
+ 1 | 1 | 4 | | 1
+ 1 | 1 | | 1 | 1
+ 1 | 1 | | 2 | 1
+ 1 | 1 | | 3 | 1
+ 1 | 1 | | 4 | 1
+ 1 | 1 | | 5 | 1
+ 1 | 1 | | 6 | 1
+ 1 | 1 | | 7 | 1
+ 1 | 1 | | 8 | 1
+ 1 | 1 | | 9 | 1
+ 1 | 1 | | 10 | 1
+ 1 | 1 | | 11 | 1
+ 1 | 1 | | 12 | 1
+ 1 | 1 | | 13 | 1
+ 1 | 1 | | 14 | 1
+ 1 | 1 | | 15 | 1
+ 1 | 1 | | 16 | 1
+ 1 | 1 | | 17 | 1
+ 1 | 1 | | 18 | 1
+ 1 | 1 | | 19 | 1
+ 1 | 1 | | 20 | 1
+ 1 | 1 | | 21 | 1
+ 1 | 1 | | 22 | 1
+ 1 | 1 | | 23 | 1
+ 1 | 1 | | 24 | 1
+ 1 | 1 | | 25 | 1
+ 1 | 1 | | 26 | 1
+ 1 | 1 | | 27 | 1
+ 1 | 1 | | 28 | 1
+ 1 | 1 | | 29 | 1
+ 1 | 1 | | 30 | 1
+ 1 | 1 | | 31 | 1
+ 1 | 1 | | 32 | 1
+ 1 | 1 | | 33 | 1
+ 1 | 1 | | 34 | 1
+ 1 | 1 | | 35 | 1
+ 1 | 1 | | 36 | 1
+ 1 | 1 | | 37 | 1
+ 1 | 1 | | 38 | 1
+ 1 | 1 | | 39 | 1
+ 1 | 1 | | 40 | 1
+ 1 | 1 | | | 40
+ 2 | 2 | 0 | 1 | 1
+ 2 | 2 | 0 | 2 | 1
+ 2 | 2 | 0 | 3 | 1
+ 2 | 2 | 0 | 4 | 1
+ 2 | 2 | 0 | 5 | 1
+ 2 | 2 | 0 | 6 | 1
+ 2 | 2 | 0 | 7 | 1
+ 2 | 2 | 0 | 8 | 1
+ 2 | 2 | 0 | 9 | 1
+ 2 | 2 | 0 | | 9
+ 2 | 2 | 1 | 10 | 1
+ 2 | 2 | 1 | 11 | 1
+ 2 | 2 | 1 | 12 | 1
+ 2 | 2 | 1 | 13 | 1
+ 2 | 2 | 1 | 14 | 1
+ 2 | 2 | 1 | 15 | 1
+ 2 | 2 | 1 | 16 | 1
+ 2 | 2 | 1 | 17 | 1
+ 2 | 2 | 1 | 18 | 1
+ 2 | 2 | 1 | 19 | 1
+ 2 | 2 | 1 | | 10
+ 2 | 2 | 2 | 20 | 1
+ 2 | 2 | 2 | 21 | 1
+ 2 | 2 | 2 | 22 | 1
+ 2 | 2 | 2 | 23 | 1
+ 2 | 2 | 2 | 24 | 1
+ 2 | 2 | 2 | 25 | 1
+ 2 | 2 | 2 | 26 | 1
+ 2 | 2 | 2 | 27 | 1
+ 2 | 2 | 2 | 28 | 1
+ 2 | 2 | 2 | 29 | 1
+ 2 | 2 | 2 | | 10
+ 2 | 2 | 3 | 30 | 1
+ 2 | 2 | 3 | 31 | 1
+ 2 | 2 | 3 | 32 | 1
+ 2 | 2 | 3 | 33 | 1
+ 2 | 2 | 3 | 34 | 1
+ 2 | 2 | 3 | 35 | 1
+ 2 | 2 | 3 | 36 | 1
+ 2 | 2 | 3 | 37 | 1
+ 2 | 2 | 3 | 38 | 1
+ 2 | 2 | 3 | 39 | 1
+ 2 | 2 | 3 | | 10
+ 2 | 2 | 4 | 40 | 1
+ 2 | 2 | 4 | | 1
+ 2 | 2 | | 1 | 1
+ 2 | 2 | | 2 | 1
+ 2 | 2 | | 3 | 1
+ 2 | 2 | | 4 | 1
+ 2 | 2 | | 5 | 1
+ 2 | 2 | | 6 | 1
+ 2 | 2 | | 7 | 1
+ 2 | 2 | | 8 | 1
+ 2 | 2 | | 9 | 1
+ 2 | 2 | | 10 | 1
+ 2 | 2 | | 11 | 1
+ 2 | 2 | | 12 | 1
+ 2 | 2 | | 13 | 1
+ 2 | 2 | | 14 | 1
+ 2 | 2 | | 15 | 1
+ 2 | 2 | | 16 | 1
+ 2 | 2 | | 17 | 1
+ 2 | 2 | | 18 | 1
+ 2 | 2 | | 19 | 1
+ 2 | 2 | | 20 | 1
+ 2 | 2 | | 21 | 1
+ 2 | 2 | | 22 | 1
+ 2 | 2 | | 23 | 1
+ 2 | 2 | | 24 | 1
+ 2 | 2 | | 25 | 1
+ 2 | 2 | | 26 | 1
+ 2 | 2 | | 27 | 1
+ 2 | 2 | | 28 | 1
+ 2 | 2 | | 29 | 1
+ 2 | 2 | | 30 | 1
+ 2 | 2 | | 31 | 1
+ 2 | 2 | | 32 | 1
+ 2 | 2 | | 33 | 1
+ 2 | 2 | | 34 | 1
+ 2 | 2 | | 35 | 1
+ 2 | 2 | | 36 | 1
+ 2 | 2 | | 37 | 1
+ 2 | 2 | | 38 | 1
+ 2 | 2 | | 39 | 1
+ 2 | 2 | | 40 | 1
+ 2 | 2 | | | 40
+(172 rows)
+
+--
+-- Compare results between plans using sorting and plans using hash
+-- aggregation. Force spilling in both cases by setting work_mem low
+-- and altering the statistics.
+--
+create table gs_data_1 as
+select g%1000 as g1000, g%100 as g100, g%10 as g10, g
+ from generate_series(0,1999) g;
+analyze gs_data_1;
+alter table gs_data_1 set (autovacuum_enabled = 'false');
+update pg_class set reltuples = 10 where relname='gs_data_1';
+set work_mem='64kB';
+-- Produce results with sorting.
+set enable_sort = true;
+set enable_hashagg = false;
+set jit_above_cost = 0;
+explain (costs off)
+select g100, g10, sum(g::numeric), count(*), max(g::text)
+from gs_data_1 group by cube (g1000, g100,g10);
+ QUERY PLAN
+------------------------------------
+ GroupAggregate
+ Group Key: g1000, g100, g10
+ Group Key: g1000, g100
+ Group Key: g1000
+ Group Key: ()
+ Sort Key: g100, g10
+ Group Key: g100, g10
+ Group Key: g100
+ Sort Key: g10, g1000
+ Group Key: g10, g1000
+ Group Key: g10
+ -> Sort
+ Sort Key: g1000, g100, g10
+ -> Seq Scan on gs_data_1
+(14 rows)
+
+create table gs_group_1 as
+select g100, g10, sum(g::numeric), count(*), max(g::text)
+from gs_data_1 group by cube (g1000, g100,g10);
+-- Produce results with hash aggregation.
+set enable_hashagg = true;
+set enable_sort = false;
+explain (costs off)
+select g100, g10, sum(g::numeric), count(*), max(g::text)
+from gs_data_1 group by cube (g1000, g100,g10);
+ QUERY PLAN
+------------------------------
+ MixedAggregate
+ Hash Key: g1000, g100, g10
+ Hash Key: g1000, g100
+ Hash Key: g1000
+ Hash Key: g100, g10
+ Hash Key: g100
+ Hash Key: g10, g1000
+ Hash Key: g10
+ Group Key: ()
+ -> Seq Scan on gs_data_1
+(10 rows)
+
+create table gs_hash_1 as
+select g100, g10, sum(g::numeric), count(*), max(g::text)
+from gs_data_1 group by cube (g1000, g100,g10);
+set enable_sort = true;
+set work_mem to default;
+set hash_mem_multiplier to default;
+-- Compare results
+(select * from gs_hash_1 except select * from gs_group_1)
+ union all
+(select * from gs_group_1 except select * from gs_hash_1);
+ g100 | g10 | sum | count | max
+------+-----+-----+-------+-----
+(0 rows)
+
+drop table gs_group_1;
+drop table gs_hash_1;
+-- GROUP BY DISTINCT
+-- "normal" behavior...
+select a, b, c
+from (values (1, 2, 3), (4, null, 6), (7, 8, 9)) as t (a, b, c)
+group by all rollup(a, b), rollup(a, c)
+order by a, b, c;
+ a | b | c
+---+---+---
+ 1 | 2 | 3
+ 1 | 2 |
+ 1 | 2 |
+ 1 | | 3
+ 1 | | 3
+ 1 | |
+ 1 | |
+ 1 | |
+ 4 | | 6
+ 4 | | 6
+ 4 | | 6
+ 4 | |
+ 4 | |
+ 4 | |
+ 4 | |
+ 4 | |
+ 7 | 8 | 9
+ 7 | 8 |
+ 7 | 8 |
+ 7 | | 9
+ 7 | | 9
+ 7 | |
+ 7 | |
+ 7 | |
+ | |
+(25 rows)
+
+-- ...which is also the default
+select a, b, c
+from (values (1, 2, 3), (4, null, 6), (7, 8, 9)) as t (a, b, c)
+group by rollup(a, b), rollup(a, c)
+order by a, b, c;
+ a | b | c
+---+---+---
+ 1 | 2 | 3
+ 1 | 2 |
+ 1 | 2 |
+ 1 | | 3
+ 1 | | 3
+ 1 | |
+ 1 | |
+ 1 | |
+ 4 | | 6
+ 4 | | 6
+ 4 | | 6
+ 4 | |
+ 4 | |
+ 4 | |
+ 4 | |
+ 4 | |
+ 7 | 8 | 9
+ 7 | 8 |
+ 7 | 8 |
+ 7 | | 9
+ 7 | | 9
+ 7 | |
+ 7 | |
+ 7 | |
+ | |
+(25 rows)
+
+-- "group by distinct" behavior...
+select a, b, c
+from (values (1, 2, 3), (4, null, 6), (7, 8, 9)) as t (a, b, c)
+group by distinct rollup(a, b), rollup(a, c)
+order by a, b, c;
+ a | b | c
+---+---+---
+ 1 | 2 | 3
+ 1 | 2 |
+ 1 | | 3
+ 1 | |
+ 4 | | 6
+ 4 | | 6
+ 4 | |
+ 4 | |
+ 7 | 8 | 9
+ 7 | 8 |
+ 7 | | 9
+ 7 | |
+ | |
+(13 rows)
+
+-- ...which is not the same as "select distinct"
+select distinct a, b, c
+from (values (1, 2, 3), (4, null, 6), (7, 8, 9)) as t (a, b, c)
+group by rollup(a, b), rollup(a, c)
+order by a, b, c;
+ a | b | c
+---+---+---
+ 1 | 2 | 3
+ 1 | 2 |
+ 1 | | 3
+ 1 | |
+ 4 | | 6
+ 4 | |
+ 7 | 8 | 9
+ 7 | 8 |
+ 7 | | 9
+ 7 | |
+ | |
+(11 rows)
+
+-- test handling of outer GroupingFunc within subqueries
+explain (costs off)
+select (select grouping(v1)) from (values ((select 1))) v(v1) group by cube(v1);
+ QUERY PLAN
+---------------------------
+ MixedAggregate
+ Hash Key: $2
+ Group Key: ()
+ InitPlan 1 (returns $1)
+ -> Result
+ InitPlan 3 (returns $2)
+ -> Result
+ -> Result
+ SubPlan 2
+ -> Result
+(10 rows)
+
+select (select grouping(v1)) from (values ((select 1))) v(v1) group by cube(v1);
+ grouping
+----------
+ 1
+ 0
+(2 rows)
+
+explain (costs off)
+select (select grouping(v1)) from (values ((select 1))) v(v1) group by v1;
+ QUERY PLAN
+---------------------------
+ GroupAggregate
+ Group Key: $2
+ InitPlan 1 (returns $1)
+ -> Result
+ InitPlan 3 (returns $2)
+ -> Result
+ -> Result
+ SubPlan 2
+ -> Result
+(9 rows)
+
+select (select grouping(v1)) from (values ((select 1))) v(v1) group by v1;
+ grouping
+----------
+ 0
+(1 row)
+
+-- end
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-23 19:43:58 +0000