--- /dev/null
+--
+-- AGGREGATES
+--
+SELECT avg(four) AS avg_1 FROM onek;
+ avg_1
+--------------------
+ 1.5000000000000000
+(1 row)
+
+SELECT avg(a) AS avg_32 FROM aggtest WHERE a < 100;
+ avg_32
+---------------------
+ 32.6666666666666667
+(1 row)
+
+-- 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;
+ avg_107_943
+-------------
+ 107.943
+(1 row)
+
+SELECT avg(gpa) AS avg_3_4 FROM ONLY student;
+ avg_3_4
+---------
+ 3.4
+(1 row)
+
+SELECT sum(four) AS sum_1500 FROM onek;
+ sum_1500
+----------
+ 1500
+(1 row)
+
+SELECT sum(a) AS sum_198 FROM aggtest;
+ sum_198
+---------
+ 198
+(1 row)
+
+SELECT sum(b) AS avg_431_773 FROM aggtest;
+ avg_431_773
+-------------
+ 431.773
+(1 row)
+
+SELECT sum(gpa) AS avg_6_8 FROM ONLY student;
+ avg_6_8
+---------
+ 6.8
+(1 row)
+
+SELECT max(four) AS max_3 FROM onek;
+ max_3
+-------
+ 3
+(1 row)
+
+SELECT max(a) AS max_100 FROM aggtest;
+ max_100
+---------
+ 100
+(1 row)
+
+SELECT max(aggtest.b) AS max_324_78 FROM aggtest;
+ max_324_78
+------------
+ 324.78
+(1 row)
+
+SELECT max(student.gpa) AS max_3_7 FROM student;
+ max_3_7
+---------
+ 3.7
+(1 row)
+
+SELECT stddev_pop(b) FROM aggtest;
+ stddev_pop
+------------------
+ 131.107032318951
+(1 row)
+
+SELECT stddev_samp(b) FROM aggtest;
+ stddev_samp
+------------------
+ 151.389360803998
+(1 row)
+
+SELECT var_pop(b) FROM aggtest;
+ var_pop
+------------------
+ 17189.0539234824
+(1 row)
+
+SELECT var_samp(b) FROM aggtest;
+ var_samp
+------------------
+ 22918.7385646432
+(1 row)
+
+SELECT stddev_pop(b::numeric) FROM aggtest;
+ stddev_pop
+------------------
+ 131.107032862199
+(1 row)
+
+SELECT stddev_samp(b::numeric) FROM aggtest;
+ stddev_samp
+------------------
+ 151.389361431288
+(1 row)
+
+SELECT var_pop(b::numeric) FROM aggtest;
+ var_pop
+--------------------
+ 17189.054065929769
+(1 row)
+
+SELECT var_samp(b::numeric) FROM aggtest;
+ var_samp
+--------------------
+ 22918.738754573025
+(1 row)
+
+-- population variance is defined for a single tuple, sample variance
+-- is not
+SELECT var_pop(1.0), var_samp(2.0);
+ var_pop | var_samp
+---------+----------
+ 0 |
+(1 row)
+
+SELECT stddev_pop(3.0::numeric), stddev_samp(4.0::numeric);
+ stddev_pop | stddev_samp
+------------+-------------
+ 0 |
+(1 row)
+
+-- verify correct results for null and NaN inputs
+select sum(null::int4) from generate_series(1,3);
+ sum
+-----
+
+(1 row)
+
+select sum(null::int8) from generate_series(1,3);
+ sum
+-----
+
+(1 row)
+
+select sum(null::numeric) from generate_series(1,3);
+ sum
+-----
+
+(1 row)
+
+select sum(null::float8) from generate_series(1,3);
+ sum
+-----
+
+(1 row)
+
+select avg(null::int4) from generate_series(1,3);
+ avg
+-----
+
+(1 row)
+
+select avg(null::int8) from generate_series(1,3);
+ avg
+-----
+
+(1 row)
+
+select avg(null::numeric) from generate_series(1,3);
+ avg
+-----
+
+(1 row)
+
+select avg(null::float8) from generate_series(1,3);
+ avg
+-----
+
+(1 row)
+
+select sum('NaN'::numeric) from generate_series(1,3);
+ sum
+-----
+ NaN
+(1 row)
+
+select avg('NaN'::numeric) from generate_series(1,3);
+ avg
+-----
+ NaN
+(1 row)
+
+-- SQL2003 binary aggregates
+SELECT regr_count(b, a) FROM aggtest;
+ regr_count
+------------
+ 4
+(1 row)
+
+SELECT regr_sxx(b, a) FROM aggtest;
+ regr_sxx
+----------
+ 5099
+(1 row)
+
+SELECT regr_syy(b, a) FROM aggtest;
+ regr_syy
+------------------
+ 68756.2156939297
+(1 row)
+
+SELECT regr_sxy(b, a) FROM aggtest;
+ regr_sxy
+------------------
+ 2614.51582155001
+(1 row)
+
+SELECT regr_avgx(b, a), regr_avgy(b, a) FROM aggtest;
+ regr_avgx | regr_avgy
+-----------+------------------
+ 49.5 | 107.943152273074
+(1 row)
+
+SELECT regr_r2(b, a) FROM aggtest;
+ regr_r2
+--------------------
+ 0.0194977982031796
+(1 row)
+
+SELECT regr_slope(b, a), regr_intercept(b, a) FROM aggtest;
+ regr_slope | regr_intercept
+-------------------+------------------
+ 0.512750700441265 | 82.5619926012313
+(1 row)
+
+SELECT covar_pop(b, a), covar_samp(b, a) FROM aggtest;
+ covar_pop | covar_samp
+------------------+------------------
+ 653.628955387502 | 871.505273850003
+(1 row)
+
+SELECT corr(b, a) FROM aggtest;
+ corr
+-------------------
+ 0.139634516517871
+(1 row)
+
+SELECT count(four) AS cnt_1000 FROM onek;
+ cnt_1000
+----------
+ 1000
+(1 row)
+
+SELECT count(DISTINCT four) AS cnt_4 FROM onek;
+ cnt_4
+-------
+ 4
+(1 row)
+
+select ten, count(*), sum(four) from onek
+group by ten order by ten;
+ ten | count | sum
+-----+-------+-----
+ 0 | 100 | 100
+ 1 | 100 | 200
+ 2 | 100 | 100
+ 3 | 100 | 200
+ 4 | 100 | 100
+ 5 | 100 | 200
+ 6 | 100 | 100
+ 7 | 100 | 200
+ 8 | 100 | 100
+ 9 | 100 | 200
+(10 rows)
+
+select ten, count(four), sum(DISTINCT four) from onek
+group by ten order by ten;
+ ten | count | sum
+-----+-------+-----
+ 0 | 100 | 2
+ 1 | 100 | 4
+ 2 | 100 | 2
+ 3 | 100 | 4
+ 4 | 100 | 2
+ 5 | 100 | 4
+ 6 | 100 | 2
+ 7 | 100 | 4
+ 8 | 100 | 2
+ 9 | 100 | 4
+(10 rows)
+
+-- user-defined aggregates
+SELECT newavg(four) AS avg_1 FROM onek;
+ avg_1
+--------------------
+ 1.5000000000000000
+(1 row)
+
+SELECT newsum(four) AS sum_1500 FROM onek;
+ sum_1500
+----------
+ 1500
+(1 row)
+
+SELECT newcnt(four) AS cnt_1000 FROM onek;
+ cnt_1000
+----------
+ 1000
+(1 row)
+
+SELECT newcnt(*) AS cnt_1000 FROM onek;
+ cnt_1000
+----------
+ 1000
+(1 row)
+
+SELECT oldcnt(*) AS cnt_1000 FROM onek;
+ cnt_1000
+----------
+ 1000
+(1 row)
+
+SELECT sum2(q1,q2) FROM int8_tbl;
+ sum2
+-------------------
+ 18271560493827981
+(1 row)
+
+-- test for outer-level aggregates
+-- this should work
+select ten, sum(distinct four) from onek a
+group by ten
+having exists (select 1 from onek b where sum(distinct a.four) = b.four)
+order by ten;
+ ten | sum
+-----+-----
+ 0 | 2
+ 2 | 2
+ 4 | 2
+ 6 | 2
+ 8 | 2
+(5 rows)
+
+-- this should fail because subquery has an agg of its own in WHERE
+select ten, sum(distinct four) from onek a
+group by ten
+having exists (select 1 from onek b
+ where sum(distinct a.four + b.four) = b.four);
+ERROR: aggregate functions are not allowed in WHERE
+LINE 4: 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;
+ max
+------
+ 9999
+(1 row)
+
+--
+-- 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 "?"
+FROM bitwise_test;
+ ? | ?
+---+---
+ |
+(1 row)
+
+COPY bitwise_test FROM STDIN NULL 'null';
+SELECT
+ BIT_AND(i2) AS "1",
+ BIT_AND(i4) AS "1",
+ BIT_AND(i8) AS "1",
+ BIT_AND(i) AS "?",
+ BIT_AND(x) AS "0",
+ BIT_AND(y) AS "0100",
+ BIT_OR(i2) AS "7",
+ BIT_OR(i4) AS "7",
+ BIT_OR(i8) AS "7",
+ BIT_OR(i) AS "?",
+ BIT_OR(x) AS "7",
+ BIT_OR(y) AS "1101"
+FROM bitwise_test;
+ 1 | 1 | 1 | ? | 0 | 0100 | 7 | 7 | 7 | ? | 7 | 1101
+---+---+---+---+---+------+---+---+---+---+---+------
+ 1 | 1 | 1 | 1 | 0 | 0100 | 7 | 7 | 7 | 3 | 7 | 1101
+(1 row)
+
+--
+-- test boolean aggregates
+--
+-- first test all possible transition and final states
+SELECT
+ -- boolean and transitions
+ -- null because strict
+ booland_statefunc(NULL, NULL) IS NULL AS "t",
+ booland_statefunc(TRUE, NULL) IS NULL AS "t",
+ booland_statefunc(FALSE, NULL) IS NULL AS "t",
+ booland_statefunc(NULL, TRUE) IS NULL AS "t",
+ booland_statefunc(NULL, FALSE) IS NULL AS "t",
+ -- and actual computations
+ booland_statefunc(TRUE, TRUE) AS "t",
+ NOT booland_statefunc(TRUE, FALSE) AS "t",
+ NOT booland_statefunc(FALSE, TRUE) AS "t",
+ NOT booland_statefunc(FALSE, FALSE) AS "t";
+ t | t | t | t | t | t | t | t | t
+---+---+---+---+---+---+---+---+---
+ t | t | t | t | t | t | t | t | t
+(1 row)
+
+SELECT
+ -- boolean or transitions
+ -- null because strict
+ boolor_statefunc(NULL, NULL) IS NULL AS "t",
+ boolor_statefunc(TRUE, NULL) IS NULL AS "t",
+ boolor_statefunc(FALSE, NULL) IS NULL AS "t",
+ boolor_statefunc(NULL, TRUE) IS NULL AS "t",
+ boolor_statefunc(NULL, FALSE) IS NULL AS "t",
+ -- actual computations
+ boolor_statefunc(TRUE, TRUE) AS "t",
+ boolor_statefunc(TRUE, FALSE) AS "t",
+ boolor_statefunc(FALSE, TRUE) AS "t",
+ NOT boolor_statefunc(FALSE, FALSE) AS "t";
+ t | t | t | t | t | t | t | t | t
+---+---+---+---+---+---+---+---+---
+ t | t | t | t | t | t | t | t | t
+(1 row)
+
+CREATE TEMPORARY TABLE bool_test(
+ b1 BOOL,
+ b2 BOOL,
+ b3 BOOL,
+ b4 BOOL);
+-- empty case
+SELECT
+ BOOL_AND(b1) AS "n",
+ BOOL_OR(b3) AS "n"
+FROM bool_test;
+ n | n
+---+---
+ |
+(1 row)
+
+COPY bool_test FROM STDIN NULL 'null';
+SELECT
+ BOOL_AND(b1) AS "f",
+ BOOL_AND(b2) AS "t",
+ BOOL_AND(b3) AS "f",
+ BOOL_AND(b4) AS "n",
+ BOOL_AND(NOT b2) AS "f",
+ BOOL_AND(NOT b3) AS "t"
+FROM bool_test;
+ f | t | f | n | f | t
+---+---+---+---+---+---
+ f | t | f | | f | t
+(1 row)
+
+SELECT
+ EVERY(b1) AS "f",
+ EVERY(b2) AS "t",
+ EVERY(b3) AS "f",
+ EVERY(b4) AS "n",
+ EVERY(NOT b2) AS "f",
+ EVERY(NOT b3) AS "t"
+FROM bool_test;
+ f | t | f | n | f | t
+---+---+---+---+---+---
+ f | t | f | | f | t
+(1 row)
+
+SELECT
+ BOOL_OR(b1) AS "t",
+ BOOL_OR(b2) AS "t",
+ BOOL_OR(b3) AS "f",
+ BOOL_OR(b4) AS "n",
+ BOOL_OR(NOT b2) AS "f",
+ BOOL_OR(NOT b3) AS "t"
+FROM bool_test;
+ t | t | f | n | f | t
+---+---+---+---+---+---
+ t | t | f | | f | t
+(1 row)
+
+--
+-- Test cases that should be optimized into indexscans instead of
+-- the generic aggregate implementation.
+-- In Postgres-XL, plans printed by explain are the ones created on the
+-- coordinator. Coordinator does not generate index scan plans.
+--
+-- Basic cases
+explain (costs off, nodes off)
+ select min(unique1) from tenk1;
+ QUERY PLAN
+------------------------------------------------------------------------
+ Result
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan using tenk1_unique1 on tenk1
+ Index Cond: (unique1 IS NOT NULL)
+(7 rows)
+
+select min(unique1) from tenk1;
+ min
+-----
+ 0
+(1 row)
+
+explain (costs off, nodes off)
+ select max(unique1) from tenk1;
+ QUERY PLAN
+---------------------------------------------------------------------------------
+ Result
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan Backward using tenk1_unique1 on tenk1
+ Index Cond: (unique1 IS NOT NULL)
+(7 rows)
+
+select max(unique1) from tenk1;
+ max
+------
+ 9999
+(1 row)
+
+explain (costs off, nodes off)
+ select max(unique1) from tenk1 where unique1 < 42;
+ QUERY PLAN
+------------------------------------------------------------------------------------
+ Result
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan Backward using tenk1_unique1 on tenk1
+ Index Cond: ((unique1 IS NOT NULL) AND (unique1 < 42))
+(7 rows)
+
+select max(unique1) from tenk1 where unique1 < 42;
+ max
+-----
+ 41
+(1 row)
+
+explain (costs off, nodes off)
+ select max(unique1) from tenk1 where unique1 > 42;
+ QUERY PLAN
+------------------------------------------------------------------------------------
+ Result
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan Backward using tenk1_unique1 on tenk1
+ Index Cond: ((unique1 IS NOT NULL) AND (unique1 > 42))
+(7 rows)
+
+select max(unique1) from tenk1 where unique1 > 42;
+ max
+------
+ 9999
+(1 row)
+
+explain (costs off, nodes off)
+ select max(unique1) from tenk1 where unique1 > 42000;
+ QUERY PLAN
+---------------------------------------------------------------------------------------
+ Result
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan Backward using tenk1_unique1 on tenk1
+ Index Cond: ((unique1 IS NOT NULL) AND (unique1 > 42000))
+(7 rows)
+
+select max(unique1) from tenk1 where unique1 > 42000;
+ max
+-----
+
+(1 row)
+
+-- multi-column index (uses tenk1_thous_tenthous)
+explain (costs off, nodes off)
+ select max(tenthous) from tenk1 where thousand = 33;
+ QUERY PLAN
+----------------------------------------------------------------------------------------
+ Result
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan Backward using tenk1_thous_tenthous on tenk1
+ Index Cond: ((thousand = 33) AND (tenthous IS NOT NULL))
+(7 rows)
+
+select max(tenthous) from tenk1 where thousand = 33;
+ max
+------
+ 9033
+(1 row)
+
+explain (costs off, nodes off)
+ select min(tenthous) from tenk1 where thousand = 33;
+ QUERY PLAN
+--------------------------------------------------------------------------------------
+ Result
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan using tenk1_thous_tenthous on tenk1
+ Index Cond: ((thousand = 33) AND (tenthous IS NOT NULL))
+(7 rows)
+
+select min(tenthous) from tenk1 where thousand = 33;
+ min
+-----
+ 33
+(1 row)
+
+-- check parameter propagation into an indexscan subquery
+explain (costs off, nodes off)
+ select f1, (select min(unique1) from tenk1 where unique1 > f1) AS gt
+ from int4_tbl;
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------
+ Remote Subquery Scan on all
+ -> Seq Scan on int4_tbl
+ SubPlan 2
+ -> Result
+ InitPlan 1 (returns $1)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan using tenk1_unique1 on tenk1
+ Index Cond: ((unique1 IS NOT NULL) AND (unique1 > int4_tbl.f1))
+(10 rows)
+
+select f1, (select min(unique1) from tenk1 where unique1 > f1) AS gt
+from int4_tbl
+order by f1;
+ f1 | gt
+-------------+----
+ -2147483647 | 0
+ -123456 | 0
+ 0 | 1
+ 123456 |
+ 2147483647 |
+(5 rows)
+
+-- check some cases that were handled incorrectly in 8.3.0
+explain (costs off, nodes off)
+ select distinct max(unique2) from tenk1;
+ QUERY PLAN
+---------------------------------------------------------------------------------
+ HashAggregate
+ Group Key: $0
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan Backward using tenk1_unique2 on tenk1
+ Index Cond: (unique2 IS NOT NULL)
+ -> Result
+(9 rows)
+
+select distinct max(unique2) from tenk1;
+ max
+------
+ 9999
+(1 row)
+
+explain (costs off, nodes off)
+ select max(unique2) from tenk1 order by 1;
+ QUERY PLAN
+---------------------------------------------------------------------------------
+ Sort
+ Sort Key: ($0)
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan Backward using tenk1_unique2 on tenk1
+ Index Cond: (unique2 IS NOT NULL)
+ -> Result
+(9 rows)
+
+select max(unique2) from tenk1 order by 1;
+ max
+------
+ 9999
+(1 row)
+
+explain (costs off, nodes off)
+ select max(unique2) from tenk1 order by max(unique2);
+ QUERY PLAN
+---------------------------------------------------------------------------------
+ Sort
+ Sort Key: ($0)
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan Backward using tenk1_unique2 on tenk1
+ Index Cond: (unique2 IS NOT NULL)
+ -> Result
+(9 rows)
+
+select max(unique2) from tenk1 order by max(unique2);
+ max
+------
+ 9999
+(1 row)
+
+explain (costs off, nodes off)
+ select max(unique2) from tenk1 order by max(unique2)+1;
+ QUERY PLAN
+---------------------------------------------------------------------------------
+ Sort
+ Sort Key: (($0 + 1))
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan Backward using tenk1_unique2 on tenk1
+ Index Cond: (unique2 IS NOT NULL)
+ -> Result
+(9 rows)
+
+select max(unique2) from tenk1 order by max(unique2)+1;
+ max
+------
+ 9999
+(1 row)
+
+explain (costs off, nodes off)
+ select max(unique2), generate_series(1,3) as g from tenk1 order by g desc;
+ QUERY PLAN
+---------------------------------------------------------------------------------
+ Sort
+ Sort Key: (generate_series(1, 3)) DESC
+ InitPlan 1 (returns $0)
+ -> Limit
+ -> Remote Subquery Scan on all
+ -> Limit
+ -> Index Only Scan Backward using tenk1_unique2 on tenk1
+ Index Cond: (unique2 IS NOT NULL)
+ -> Result
+(9 rows)
+
+select max(unique2), generate_series(1,3) as g from tenk1 order by g desc;
+ max | g
+------+---
+ 9999 | 3
+ 9999 | 2
+ 9999 | 1
+(3 rows)
+
+-- try it on an inheritance tree
+create table minmaxtest(f1 int);
+create table minmaxtest1() inherits (minmaxtest);
+create table minmaxtest2() inherits (minmaxtest);
+create table minmaxtest3() inherits (minmaxtest);
+create index minmaxtesti on minmaxtest(f1);
+create index minmaxtest1i on minmaxtest1(f1);
+create index minmaxtest2i on minmaxtest2(f1 desc);
+create index minmaxtest3i on minmaxtest3(f1) where f1 is not null;
+insert into minmaxtest values(11), (12);
+insert into minmaxtest1 values(13), (14);
+insert into minmaxtest2 values(15), (16);
+insert into minmaxtest3 values(17), (18);
+explain (costs off, nodes off)
+ select min(f1), max(f1) from minmaxtest;
+ QUERY PLAN
+-------------------------------------------------
+ Aggregate
+ -> Remote Subquery Scan on all
+ -> Aggregate
+ -> Append
+ -> Seq Scan on minmaxtest
+ -> Seq Scan on minmaxtest1
+ -> Seq Scan on minmaxtest2
+ -> Seq Scan on minmaxtest3
+(8 rows)
+
+select min(f1), max(f1) from minmaxtest;
+ min | max
+-----+-----
+ 11 | 18
+(1 row)
+
+-- DISTINCT doesn't do anything useful here, but it shouldn't fail
+explain (costs off)
+ select distinct min(f1), max(f1) from minmaxtest;
+ QUERY PLAN
+-----------------------------------------------------------------
+ HashAggregate
+ Group Key: min((min(f1))), max((max(f1)))
+ -> Aggregate
+ -> Remote Subquery Scan on all (datanode_1,datanode_2)
+ -> Aggregate
+ -> Append
+ -> Seq Scan on minmaxtest
+ -> Seq Scan on minmaxtest1
+ -> Seq Scan on minmaxtest2
+ -> Seq Scan on minmaxtest3
+(10 rows)
+
+select distinct min(f1), max(f1) from minmaxtest;
+ min | max
+-----+-----
+ 11 | 18
+(1 row)
+
+drop table minmaxtest cascade;
+NOTICE: drop cascades to 3 other objects
+DETAIL: drop cascades to table minmaxtest1
+drop cascades to table minmaxtest2
+drop cascades to table minmaxtest3
+-- check for correct detection of nested-aggregate errors
+select max(min(unique1)) from tenk1;
+ERROR: aggregate function calls cannot be nested
+LINE 1: select max(min(unique1)) from tenk1;
+ ^
+select (select max(min(unique1)) from int8_tbl) from tenk1;
+ERROR: aggregate function calls cannot be nested
+LINE 1: select (select max(min(unique1)) from int8_tbl) from tenk1;
+ ^
+--
+-- Test combinations of DISTINCT and/or ORDER BY
+--
+select array_agg(a order by b)
+ from (values (1,4),(2,3),(3,1),(4,2)) v(a,b);
+ array_agg
+-----------
+ {3,4,2,1}
+(1 row)
+
+select array_agg(a order by a)
+ from (values (1,4),(2,3),(3,1),(4,2)) v(a,b);
+ array_agg
+-----------
+ {1,2,3,4}
+(1 row)
+
+select array_agg(a order by a desc)
+ from (values (1,4),(2,3),(3,1),(4,2)) v(a,b);
+ array_agg
+-----------
+ {4,3,2,1}
+(1 row)
+
+select array_agg(b order by a desc)
+ from (values (1,4),(2,3),(3,1),(4,2)) v(a,b);
+ array_agg
+-----------
+ {2,1,3,4}
+(1 row)
+
+select array_agg(distinct a)
+ from (values (1),(2),(1),(3),(null),(2)) v(a);
+ array_agg
+--------------
+ {1,2,3,NULL}
+(1 row)
+
+select array_agg(distinct a order by a)
+ from (values (1),(2),(1),(3),(null),(2)) v(a);
+ array_agg
+--------------
+ {1,2,3,NULL}
+(1 row)
+
+select array_agg(distinct a order by a desc)
+ from (values (1),(2),(1),(3),(null),(2)) v(a);
+ array_agg
+--------------
+ {NULL,3,2,1}
+(1 row)
+
+select array_agg(distinct a order by a desc nulls last)
+ from (values (1),(2),(1),(3),(null),(2)) v(a);
+ array_agg
+--------------
+ {3,2,1,NULL}
+(1 row)
+
+-- 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);
+ aggfstr
+---------------------------------------
+ {"(1,3,foo)","(2,2,bar)","(3,1,baz)"}
+(1 row)
+
+select aggfns(a,b,c)
+ from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c);
+ aggfns
+-----------------------------------------------
+ {"(1,3,foo)","(0,,)","(2,2,bar)","(3,1,baz)"}
+(1 row)
+
+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;
+ aggfstr
+---------------------------------------
+ {"(1,3,foo)","(2,2,bar)","(3,1,baz)"}
+(1 row)
+
+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;
+ aggfns
+-----------------------------------------------
+ {"(0,,)","(1,3,foo)","(2,2,bar)","(3,1,baz)"}
+(1 row)
+
+select aggfstr(distinct a,b,c order by b)
+ from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
+ generate_series(1,3) i;
+ aggfstr
+---------------------------------------
+ {"(3,1,baz)","(2,2,bar)","(1,3,foo)"}
+(1 row)
+
+select aggfns(distinct a,b,c order by b)
+ from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
+ generate_series(1,3) i;
+ aggfns
+-----------------------------------------------
+ {"(3,1,baz)","(2,2,bar)","(1,3,foo)","(0,,)"}
+(1 row)
+
+-- test specific code paths
+select aggfns(distinct a,a,c order by 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;
+ aggfns
+------------------------------------------------
+ {"(2,2,bar)","(3,3,baz)","(1,1,foo)","(0,0,)"}
+(1 row)
+
+select aggfns(distinct a,a,c order by 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;
+ aggfns
+------------------------------------------------
+ {"(2,2,bar)","(3,3,baz)","(1,1,foo)","(0,0,)"}
+(1 row)
+
+select aggfns(distinct a,a,c order by a)
+ from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c),
+ generate_series(1,2) i;
+ aggfns
+------------------------------------------------
+ {"(0,0,)","(1,1,foo)","(2,2,bar)","(3,3,baz)"}
+(1 row)
+
+select aggfns(distinct a,b,c order by 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;
+ aggfns
+-----------------------------------------------
+ {"(0,,)","(1,3,foo)","(2,2,bar)","(3,1,baz)"}
+(1 row)
+
+-- 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;
+ aggfns
+-----------------------------------------------
+ {"(1,3,foo)","(0,,)","(2,2,bar)","(3,1,baz)"}
+(1 row)
+
+select pg_get_viewdef('agg_view1'::regclass);
+ pg_get_viewdef
+---------------------------------------------------------------------------------------------------------------------
+ SELECT aggfns(v.a, v.b, v.c) AS aggfns +
+ FROM ( VALUES (1,3,'foo'::text), (0,NULL::integer,NULL::text), (2,2,'bar'::text), (3,1,'baz'::text)) v(a, b, c);
+(1 row)
+
+create or replace 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;
+ aggfns
+-----------------------------------------------
+ {"(0,,)","(1,3,foo)","(2,2,bar)","(3,1,baz)"}
+(1 row)
+
+select pg_get_viewdef('agg_view1'::regclass);
+ pg_get_viewdef
+---------------------------------------------------------------------------------------------------------------------
+ SELECT aggfns(DISTINCT v.a, v.b, v.c) AS aggfns +
+ FROM ( VALUES (1,3,'foo'::text), (0,NULL::integer,NULL::text), (2,2,'bar'::text), (3,1,'baz'::text)) v(a, b, c),+
+ generate_series(1, 3) i(i);
+(1 row)
+
+create or replace view agg_view1 as
+ select aggfns(distinct a,b,c order by 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;
+ aggfns
+-----------------------------------------------
+ {"(3,1,baz)","(2,2,bar)","(1,3,foo)","(0,,)"}
+(1 row)
+
+select pg_get_viewdef('agg_view1'::regclass);
+ pg_get_viewdef
+---------------------------------------------------------------------------------------------------------------------
+ SELECT aggfns(DISTINCT v.a, v.b, v.c ORDER BY v.b) AS aggfns +
+ FROM ( VALUES (1,3,'foo'::text), (0,NULL::integer,NULL::text), (2,2,'bar'::text), (3,1,'baz'::text)) v(a, b, c),+
+ generate_series(1, 3) i(i);
+(1 row)
+
+create or replace view agg_view1 as
+ select aggfns(a,b,c order by b+1)
+ from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c);
+select * from agg_view1;
+ aggfns
+-----------------------------------------------
+ {"(3,1,baz)","(2,2,bar)","(1,3,foo)","(0,,)"}
+(1 row)
+
+select pg_get_viewdef('agg_view1'::regclass);
+ pg_get_viewdef
+---------------------------------------------------------------------------------------------------------------------
+ SELECT aggfns(v.a, v.b, v.c ORDER BY (v.b + 1)) AS aggfns +
+ FROM ( VALUES (1,3,'foo'::text), (0,NULL::integer,NULL::text), (2,2,'bar'::text), (3,1,'baz'::text)) v(a, b, c);
+(1 row)
+
+create or replace view agg_view1 as
+ select aggfns(a,a,c order by b)
+ from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c);
+select * from agg_view1;
+ aggfns
+------------------------------------------------
+ {"(3,3,baz)","(2,2,bar)","(1,1,foo)","(0,0,)"}
+(1 row)
+
+select pg_get_viewdef('agg_view1'::regclass);
+ pg_get_viewdef
+---------------------------------------------------------------------------------------------------------------------
+ SELECT aggfns(v.a, v.a, v.c ORDER BY v.b) AS aggfns +
+ FROM ( VALUES (1,3,'foo'::text), (0,NULL::integer,NULL::text), (2,2,'bar'::text), (3,1,'baz'::text)) v(a, b, c);
+(1 row)
+
+create or replace view agg_view1 as
+ select aggfns(a,b,c order by c using ~<~)
+ from (values (1,3,'foo'),(0,null,null),(2,2,'bar'),(3,1,'baz')) v(a,b,c);
+select * from agg_view1;
+ aggfns
+-----------------------------------------------
+ {"(2,2,bar)","(3,1,baz)","(1,3,foo)","(0,,)"}
+(1 row)
+
+select pg_get_viewdef('agg_view1'::regclass);
+ pg_get_viewdef
+---------------------------------------------------------------------------------------------------------------------
+ SELECT aggfns(v.a, v.b, v.c ORDER BY v.c USING ~<~ NULLS LAST) AS aggfns +
+ FROM ( VALUES (1,3,'foo'::text), (0,NULL::integer,NULL::text), (2,2,'bar'::text), (3,1,'baz'::text)) v(a, b, c);
+(1 row)
+
+create or replace view agg_view1 as
+ select aggfns(distinct a,b,c order by 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;
+ aggfns
+-----------------------------------------------
+ {"(0,,)","(1,3,foo)","(2,2,bar)","(3,1,baz)"}
+(1 row)
+
+select pg_get_viewdef('agg_view1'::regclass);
+ pg_get_viewdef
+---------------------------------------------------------------------------------------------------------------------
+ SELECT aggfns(DISTINCT v.a, v.b, v.c ORDER BY v.a, v.c USING ~<~ NULLS LAST, v.b) AS aggfns +
+ FROM ( VALUES (1,3,'foo'::text), (0,NULL::integer,NULL::text), (2,2,'bar'::text), (3,1,'baz'::text)) v(a, b, c),+
+ generate_series(1, 2) i(i);
+(1 row)
+
+drop view agg_view1;
+-- incorrect DISTINCT usage errors
+select aggfns(distinct a,b,c order by i)
+ from (values (1,1,'foo')) v(a,b,c), generate_series(1,2) i;
+ERROR: in an aggregate with DISTINCT, ORDER BY expressions must appear in argument list
+LINE 1: select aggfns(distinct a,b,c order by i)
+ ^
+select aggfns(distinct a,b,c order by a,b+1)
+ from (values (1,1,'foo')) v(a,b,c), generate_series(1,2) i;
+ERROR: in an aggregate with DISTINCT, ORDER BY expressions must appear in argument list
+LINE 1: select aggfns(distinct a,b,c order by a,b+1)
+ ^
+select aggfns(distinct a,b,c order by a,b,i,c)
+ from (values (1,1,'foo')) v(a,b,c), generate_series(1,2) i;
+ERROR: in an aggregate with DISTINCT, ORDER BY expressions must appear in argument list
+LINE 1: select aggfns(distinct a,b,c order by a,b,i,c)
+ ^
+select aggfns(distinct a,a,c order by a,b)
+ from (values (1,1,'foo')) v(a,b,c), generate_series(1,2) i;
+ERROR: in an aggregate with DISTINCT, ORDER BY expressions must appear in argument list
+LINE 1: select aggfns(distinct a,a,c order by a,b)
+ ^
+-- string_agg tests
+select string_agg(a,',') from (values('aaaa'),('bbbb'),('cccc')) g(a);
+ string_agg
+----------------
+ aaaa,bbbb,cccc
+(1 row)
+
+select string_agg(a,',') from (values('aaaa'),(null),('bbbb'),('cccc')) g(a);
+ string_agg
+----------------
+ aaaa,bbbb,cccc
+(1 row)
+
+select string_agg(a,'AB') from (values(null),(null),('bbbb'),('cccc')) g(a);
+ string_agg
+------------
+ bbbbABcccc
+(1 row)
+
+select string_agg(a,',') from (values(null),(null)) g(a);
+ string_agg
+------------
+
+(1 row)
+
+-- check some implicit casting cases, as per bug #5564
+select string_agg(distinct f1, ',' order by f1) from varchar_tbl; -- ok
+ string_agg
+------------
+ a,ab,abcd
+(1 row)
+
+select string_agg(distinct f1::text, ',' order by f1) from varchar_tbl; -- not ok
+ERROR: in an aggregate with DISTINCT, ORDER BY expressions must appear in argument list
+LINE 1: select string_agg(distinct f1::text, ',' order by f1) from v...
+ ^
+select string_agg(distinct f1, ',' order by f1::text) from varchar_tbl; -- not ok
+ERROR: in an aggregate with DISTINCT, ORDER BY expressions must appear in argument list
+LINE 1: select string_agg(distinct f1, ',' order by f1::text) from v...
+ ^
+select string_agg(distinct f1::text, ',' order by f1::text) from varchar_tbl; -- ok
+ string_agg
+------------
+ a,ab,abcd
+(1 row)
+
+-- string_agg bytea tests
+create table bytea_test_table(v bytea);
+select string_agg(v, '') from bytea_test_table;
+ string_agg
+------------
+
+(1 row)
+
+insert into bytea_test_table values(decode('ff','hex'));
+select string_agg(v, '') from bytea_test_table;
+ string_agg
+------------
+ \xff
+(1 row)
+
+insert into bytea_test_table values(decode('aa','hex'));
+select string_agg(v, '') from bytea_test_table;
+ string_agg
+------------
+ \xffaa
+(1 row)
+
+select string_agg(v, NULL) from bytea_test_table;
+ string_agg
+------------
+ \xffaa
+(1 row)
+
+select string_agg(v, decode('ee', 'hex')) from bytea_test_table;
+ string_agg
+------------
+ \xffeeaa
+(1 row)
+
+drop table bytea_test_table;
+-- FILTER tests
+select min(unique1) filter (where unique1 > 100) from tenk1;
+ min
+-----
+ 101
+(1 row)
+
+select ten, sum(distinct four) filter (where four::text ~ '123') from onek a
+group by ten;
+ ten | sum
+-----+-----
+ 0 |
+ 1 |
+ 2 |
+ 3 |
+ 4 |
+ 5 |
+ 6 |
+ 7 |
+ 8 |
+ 9 |
+(10 rows)
+
+select ten, sum(distinct four) filter (where four > 10) from onek a
+group by ten
+having exists (select 1 from onek b where sum(distinct a.four) = b.four);
+ ten | sum
+-----+-----
+ 0 |
+ 2 |
+ 4 |
+ 6 |
+ 8 |
+(5 rows)
+
+select max(foo COLLATE "C") filter (where (bar collate "POSIX") > '0')
+from (values ('a', 'b')) AS v(foo,bar);
+ max
+-----
+ a
+(1 row)
+
+-- 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
+ count
+-------
+ 1
+ 1
+(2 rows)
+
+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
+ count
+-------
+ 2
+(1 row)
+
+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
+ count
+-------
+ 1
+ 1
+(2 rows)
+
+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
+ max
+------
+ 9998
+(1 row)
+
+-- subquery in FILTER clause (PostgreSQL extension)
+select sum(unique1) FILTER (WHERE
+ unique1 IN (SELECT unique1 FROM onek where unique1 < 100)) FROM tenk1;
+ sum
+------
+ 4950
+(1 row)
+
+-- exercise lots of aggregate parts with FILTER
+select aggfns(distinct a,b,c order by 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;
+ aggfns
+---------------------------
+ {"(2,2,bar)","(3,1,baz)"}
+(1 row)
+
+-- ordered-set aggregates
+select p, percentile_cont(p) within group (order by 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)
+group by p order by p;
+ p | percentile_cont
+------+-----------------
+ 0 | 1
+ 0.1 | 1.4
+ 0.25 | 2
+ 0.4 | 2.6
+ 0.5 | 3
+ 0.6 | 3.4
+ 0.75 | 4
+ 0.9 | 4.6
+ 1 | 5
+(9 rows)
+
+select p, percentile_cont(p order by p) within group (order by 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)
+group by p order by p;
+ERROR: cannot use multiple ORDER BY clauses with WITHIN GROUP
+LINE 1: select p, percentile_cont(p order by p) within group (order ...
+ ^
+select p, sum() within group (order by 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)
+group by p order by p;
+ERROR: sum is not an ordered-set aggregate, so it cannot have WITHIN GROUP
+LINE 1: select p, sum() within group (order by x::float8)
+ ^
+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)
+group by p order by p;
+ERROR: WITHIN GROUP is required for ordered-set aggregate percentile_cont
+LINE 1: select p, percentile_cont(p,p)
+ ^
+select percentile_cont(0.5) within group (order by b) from aggtest;
+ percentile_cont
+------------------
+ 53.4485001564026
+(1 row)
+
+select percentile_cont(0.5) within group (order by b), sum(b) from aggtest;
+ percentile_cont | sum
+------------------+---------
+ 53.4485001564026 | 431.773
+(1 row)
+
+select percentile_cont(0.5) within group (order by thousand) from tenk1;
+ percentile_cont
+-----------------
+ 499.5
+(1 row)
+
+select percentile_disc(0.5) within group (order by thousand) from tenk1;
+ percentile_disc
+-----------------
+ 499
+(1 row)
+
+select rank(3) within group (order by x)
+from (values (1),(1),(2),(2),(3),(3),(4)) v(x);
+ rank
+------
+ 5
+(1 row)
+
+select cume_dist(3) within group (order by x)
+from (values (1),(1),(2),(2),(3),(3),(4)) v(x);
+ cume_dist
+-----------
+ 0.875
+(1 row)
+
+select percent_rank(3) within group (order by x)
+from (values (1),(1),(2),(2),(3),(3),(4),(5)) v(x);
+ percent_rank
+--------------
+ 0.5
+(1 row)
+
+select dense_rank(3) within group (order by x)
+from (values (1),(1),(2),(2),(3),(3),(4)) v(x);
+ dense_rank
+------------
+ 3
+(1 row)
+
+select percentile_disc(array[0,0.1,0.25,0.5,0.75,0.9,1]) within group (order by thousand)
+from tenk1;
+ percentile_disc
+----------------------------
+ {0,99,249,499,749,899,999}
+(1 row)
+
+select percentile_cont(array[0,0.25,0.5,0.75,1]) within group (order by thousand)
+from tenk1;
+ percentile_cont
+-----------------------------
+ {0,249.75,499.5,749.25,999}
+(1 row)
+
+select percentile_disc(array[[null,1,0.5],[0.75,0.25,null]]) within group (order by thousand)
+from tenk1;
+ percentile_disc
+---------------------------------
+ {{NULL,999,499},{749,249,NULL}}
+(1 row)
+
+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 (order by x)
+from generate_series(1,6) x;
+ percentile_cont
+------------------------------------------
+ {1,6,2.25,4.75,3.5,6,2.5,2.6,2.75,2.9,3}
+(1 row)
+
+select ten, mode() within group (order by string4) from tenk1 group by ten;
+ ten | mode
+-----+--------
+ 0 | HHHHxx
+ 1 | OOOOxx
+ 2 | VVVVxx
+ 3 | OOOOxx
+ 4 | HHHHxx
+ 5 | HHHHxx
+ 6 | OOOOxx
+ 7 | AAAAxx
+ 8 | VVVVxx
+ 9 | VVVVxx
+(10 rows)
+
+select percentile_disc(array[0.25,0.5,0.75]) within group (order by x)
+from unnest('{fred,jim,fred,jack,jill,fred,jill,jim,jim,sheila,jim,sheila}'::text[]) u(x);
+ percentile_disc
+-----------------
+ {fred,jill,jim}
+(1 row)
+
+-- check collation propagates up in suitable cases:
+select pg_collation_for(percentile_disc(1) within group (order by x collate "POSIX"))
+ from (values ('fred'),('jim')) v(x);
+ pg_collation_for
+------------------
+ "POSIX"
+(1 row)
+
+-- ordered-set aggs created with CREATE AGGREGATE
+select test_rank(3) within group (order by x)
+from (values (1),(1),(2),(2),(3),(3),(4)) v(x);
+ test_rank
+-----------
+ 5
+(1 row)
+
+select test_percentile_disc(0.5) within group (order by thousand) from tenk1;
+ test_percentile_disc
+----------------------
+ 499
+(1 row)
+
+-- ordered-set aggs can't use ungrouped vars in direct args:
+select rank(x) within group (order by x) from generate_series(1,5) x;
+ERROR: column "x.x" must appear in the GROUP BY clause or be used in an aggregate function
+LINE 1: select rank(x) within group (order by x) from generate_serie...
+ ^
+DETAIL: Direct arguments of an ordered-set aggregate must use only grouped columns.
+-- outer-level agg can't use a grouped arg of a lower level, either:
+select array(select percentile_disc(a) within group (order by x)
+ from (values (0.3),(0.7)) v(a) group by a)
+ from generate_series(1,5) g(x);
+ERROR: outer-level aggregate cannot contain a lower-level variable in its direct arguments
+LINE 1: select array(select percentile_disc(a) within group (order b...
+ ^
+-- agg in the direct args is a grouping violation, too:
+select rank(sum(x)) within group (order by x) from generate_series(1,5) x;
+ERROR: aggregate function calls cannot be nested
+LINE 1: select rank(sum(x)) within group (order by x) from generate_...
+ ^
+-- hypothetical-set type unification and argument-count failures:
+select rank(3) within group (order by x) from (values ('fred'),('jim')) v(x);
+ERROR: WITHIN GROUP types text and integer cannot be matched
+LINE 1: select rank(3) within group (order by x) from (values ('fred...
+ ^
+select rank(3) within group (order by stringu1,stringu2) from tenk1;
+ERROR: function rank(integer, name, name) does not exist
+LINE 1: select rank(3) within group (order by stringu1,stringu2) fro...
+ ^
+HINT: To use the hypothetical-set aggregate rank, the number of hypothetical direct arguments (here 1) must match the number of ordering columns (here 2).
+select rank('fred') within group (order by x) from generate_series(1,5) x;
+ERROR: invalid input syntax for integer: "fred"
+LINE 1: select rank('fred') within group (order by x) from generate_...
+ ^
+select rank('adam'::text collate "C") within group (order by x collate "POSIX")
+ from (values ('fred'),('jim')) v(x);
+ERROR: collation mismatch between explicit collations "C" and "POSIX"
+LINE 1: ...adam'::text collate "C") within group (order by x collate "P...
+ ^
+-- hypothetical-set type unification successes:
+select rank('adam'::varchar) within group (order by x) from (values ('fred'),('jim')) v(x);
+ rank
+------
+ 1
+(1 row)
+
+select rank('3') within group (order by x) from generate_series(1,5) x;
+ rank
+------
+ 3
+(1 row)
+
+-- divide by zero check
+select percent_rank(0) within group (order by x) from generate_series(1,0) x;
+ percent_rank
+--------------
+ 0
+(1 row)
+
+-- deparse and multiple features:
+create view aggordview1 as
+select ten,
+ percentile_disc(0.5) within group (order by thousand) as p50,
+ percentile_disc(0.5) within group (order by thousand) filter (where hundred=1) as px,
+ rank(5,'AZZZZ',50) within group (order by hundred, string4 desc, hundred)
+ from tenk1
+ group by ten order by ten;
+select pg_get_viewdef('aggordview1');
+ pg_get_viewdef
+-------------------------------------------------------------------------------------------------------------------------------
+ SELECT tenk1.ten, +
+ percentile_disc((0.5)::double precision) WITHIN GROUP (ORDER BY tenk1.thousand) AS p50, +
+ percentile_disc((0.5)::double precision) WITHIN GROUP (ORDER BY tenk1.thousand) FILTER (WHERE (tenk1.hundred = 1)) AS px,+
+ rank(5, 'AZZZZ'::name, 50) WITHIN GROUP (ORDER BY tenk1.hundred, tenk1.string4 DESC, tenk1.hundred) AS rank +
+ FROM tenk1 +
+ GROUP BY tenk1.ten +
+ ORDER BY tenk1.ten;
+(1 row)
+
+select * from aggordview1 order by ten;
+ ten | p50 | px | rank
+-----+-----+-----+------
+ 0 | 490 | | 101
+ 1 | 491 | 401 | 101
+ 2 | 492 | | 101
+ 3 | 493 | | 101
+ 4 | 494 | | 101
+ 5 | 495 | | 67
+ 6 | 496 | | 1
+ 7 | 497 | | 1
+ 8 | 498 | | 1
+ 9 | 499 | | 1
+(10 rows)
+
+drop view aggordview1;
+-- variadic aggregates
+select least_agg(q1,q2) from int8_tbl;
+ least_agg
+-------------------
+ -4567890123456789
+(1 row)
+
+select least_agg(variadic array[q1,q2]) from int8_tbl;
+ least_agg
+-------------------
+ -4567890123456789
+(1 row)
+
+-- int8 aggregates for distributed tables
+CREATE TABLE int8_tbl_aggtest AS SELECT * FROM int8_tbl;
+SELECT avg(q1) FROM int8_tbl_aggtest;
+ avg
+-----------------------
+ 2740734074074122.6000
+(1 row)
+
+SELECT sum(q1) FROM int8_tbl_aggtest;
+ sum
+-------------------
+ 13703670370370613
+(1 row)
+
+SELECT max(q1) FROM int8_tbl_aggtest;
+ max
+------------------
+ 4567890123456789
+(1 row)
+
+SELECT min(q1) FROM int8_tbl_aggtest;
+ min
+-----
+ 123
+(1 row)
+
+SELECT stddev_pop(q1) FROM int8_tbl_aggtest;
+ stddev_pop
+------------------
+ 2237800000713538
+(1 row)
+
+SELECT stddev_samp(q1) FROM int8_tbl_aggtest;
+ stddev_samp
+------------------
+ 2501936460822274
+(1 row)
+
+SELECT var_pop(q1) FROM int8_tbl_aggtest;
+ var_pop
+---------------------------------
+ 5007748843193509284246811160533
+(1 row)
+
+SELECT var_samp(q1) FROM int8_tbl_aggtest;
+ var_samp
+---------------------------------
+ 6259686053991886605308513950667
+(1 row)
+
+DROP TABLE int8_tbl_aggtest;
projects / postgres-xl.git / commitdiff