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-- ----------------------------------------------------------------
-- Regression tests for disabling hash aggregation
-- ----------------------------------------------------------------
-- Since we get different results for 3 different PG version sets, add following
-- queries to specify version of the output easier.
SHOW server_version_num \gset
SELECT :'server_version_num' >= 90600 as version_above_nine_five;
version_above_nine_five
-------------------------
t
(1 row)
SELECT :'server_version_num' >= 90500 AND :'server_version_num' < 90600 as version_nine_five;
version_nine_five
-------------------
f
(1 row)
SELECT :'server_version_num' >= 90400 AND :'server_version_num' < 90500 as version_nine_four;
version_nine_four
-------------------
f
(1 row)
SELECT hll_set_output_version(1);
hll_set_output_version
------------------------
1
(1 row)
CREATE TABLE tt1(id int, col_1 int, sd hll);
INSERT INTO tt1 values(1,1, hll_empty());
INSERT INTO tt1 values(1,2, hll_empty());
UPDATE tt1 SET sd = hll_add(sd, hll_hash_integer(111)) WHERE id = 1 and col_1 = 1;
UPDATE tt1 SET sd = hll_add(sd, hll_hash_integer(222)) WHERE id = 1 and col_1 = 2;
INSERT INTO tt1 values(2,1, hll_empty());
INSERT INTO tt1 values(2,2, hll_empty());
UPDATE tt1 SET sd = hll_add(sd, hll_hash_integer(333)) WHERE id = 2 and col_1 = 1;
UPDATE tt1 SET sd = hll_add(sd, hll_hash_integer(444)) WHERE id = 2 and col_1 = 2;
-- Test with hll_union_agg
SET hll.force_groupagg to OFF;
EXPLAIN(COSTS OFF)
SELECT
id, hll_union_agg(sd)
FROM
tt1
GROUP BY(id);
QUERY PLAN
-----------------------
HashAggregate
Group Key: id
-> Seq Scan on tt1
(3 rows)
SET hll.force_groupagg to ON;
EXPLAIN(COSTS OFF)
SELECT
id, hll_union_agg(sd)
FROM
tt1
GROUP BY(id);
QUERY PLAN
-----------------------------
GroupAggregate
Group Key: id
-> Sort
Sort Key: id
-> Seq Scan on tt1
(5 rows)
-- Test with operator over aggregate
SET hll.force_groupagg to OFF;
EXPLAIN(COSTS OFF)
SELECT
id, hll_union_agg(sd) || hll_union_agg(sd)
FROM
tt1
GROUP BY(id);
QUERY PLAN
-----------------------
HashAggregate
Group Key: id
-> Seq Scan on tt1
(3 rows)
SET hll.force_groupagg to ON;
EXPLAIN(COSTS OFF)
SELECT
id, hll_union_agg(sd) || hll_union_agg(sd)
FROM
tt1
GROUP BY(id);
QUERY PLAN
-----------------------------
GroupAggregate
Group Key: id
-> Sort
Sort Key: id
-> Seq Scan on tt1
(5 rows)
-- Test with function over aggregate
SET hll.force_groupagg to OFF;
EXPLAIN(COSTS OFF)
SELECT
id, hll_cardinality(hll_union_agg(sd))
FROM
tt1
GROUP BY(id);
QUERY PLAN
-----------------------
HashAggregate
Group Key: id
-> Seq Scan on tt1
(3 rows)
SET hll.force_groupagg to ON;
EXPLAIN(COSTS OFF)
SELECT
id, hll_cardinality(hll_union_agg(sd))
FROM
tt1
GROUP BY(id);
QUERY PLAN
-----------------------------
GroupAggregate
Group Key: id
-> Sort
Sort Key: id
-> Seq Scan on tt1
(5 rows)
-- Test with having clause
SET hll.force_groupagg to OFF;
EXPLAIN(COSTS OFF)
SELECT
id, hll_cardinality(hll_union_agg(sd))
FROM
tt1
GROUP BY(id)
HAVING hll_cardinality(hll_union_agg(sd)) > 1;
QUERY PLAN
------------------------------------------------------------------------
HashAggregate
Group Key: id
Filter: (hll_cardinality(hll_union_agg(sd)) > '1'::double precision)
-> Seq Scan on tt1
(4 rows)
SET hll.force_groupagg to ON;
EXPLAIN(COSTS OFF)
SELECT
id, hll_cardinality(hll_union_agg(sd))
FROM
tt1
GROUP BY(id)
HAVING hll_cardinality(hll_union_agg(sd)) > 1;
QUERY PLAN
------------------------------------------------------------------------
GroupAggregate
Group Key: id
Filter: (hll_cardinality(hll_union_agg(sd)) > '1'::double precision)
-> Sort
Sort Key: id
-> Seq Scan on tt1
(6 rows)
-- Test hll_add_agg, first set work_mem to 256MB in order to use hash aggregate
-- before forcing group aggregate
SET work_mem TO '256MB';
CREATE TABLE add_test_table(c1 bigint, c2 bigint);
INSERT INTO add_test_table SELECT g, g FROM generate_series(1, 1000) AS g;
-- Test with different hll_add_agg signatures
SET hll.force_groupagg TO OFF;
EXPLAIN(COSTS OFF)
SELECT
c1, hll_add_agg(hll_hash_bigint(c2))
FROM
add_test_table
GROUP BY 1;
QUERY PLAN
----------------------------------
HashAggregate
Group Key: c1
-> Seq Scan on add_test_table
(3 rows)
SET hll.force_groupagg TO ON;
EXPLAIN(COSTS OFF)
SELECT
c1, hll_add_agg(hll_hash_bigint(c2))
FROM
add_test_table
GROUP BY 1;
QUERY PLAN
----------------------------------------
GroupAggregate
Group Key: c1
-> Sort
Sort Key: c1
-> Seq Scan on add_test_table
(5 rows)
SET hll.force_groupagg TO OFF;
EXPLAIN(COSTS OFF)
SELECT
c1, hll_add_agg(hll_hash_bigint(c2), 10)
FROM
add_test_table
GROUP BY 1;
QUERY PLAN
----------------------------------
HashAggregate
Group Key: c1
-> Seq Scan on add_test_table
(3 rows)
SET hll.force_groupagg TO ON;
EXPLAIN(COSTS OFF)
SELECT
c1, hll_add_agg(hll_hash_bigint(c2), 10)
FROM
add_test_table
GROUP BY 1;
QUERY PLAN
----------------------------------------
GroupAggregate
Group Key: c1
-> Sort
Sort Key: c1
-> Seq Scan on add_test_table
(5 rows)
SET hll.force_groupagg TO OFF;
EXPLAIN(COSTS OFF)
SELECT
c1, hll_add_agg(hll_hash_bigint(c2), 10, 4)
FROM
add_test_table
GROUP BY 1;
QUERY PLAN
----------------------------------
HashAggregate
Group Key: c1
-> Seq Scan on add_test_table
(3 rows)
SET hll.force_groupagg TO ON;
EXPLAIN(COSTS OFF)
SELECT
c1, hll_add_agg(hll_hash_bigint(c2), 10, 4)
FROM
add_test_table
GROUP BY 1;
QUERY PLAN
----------------------------------------
GroupAggregate
Group Key: c1
-> Sort
Sort Key: c1
-> Seq Scan on add_test_table
(5 rows)
SET hll.force_groupagg TO OFF;
EXPLAIN(COSTS OFF)
SELECT
c1, hll_add_agg(hll_hash_bigint(c2), 10, 4, 512)
FROM
add_test_table
GROUP BY 1;
QUERY PLAN
----------------------------------
HashAggregate
Group Key: c1
-> Seq Scan on add_test_table
(3 rows)
SET hll.force_groupagg TO ON;
EXPLAIN(COSTS OFF)
SELECT
c1, hll_add_agg(hll_hash_bigint(c2), 10, 4, 512)
FROM
add_test_table
GROUP BY 1;
QUERY PLAN
----------------------------------------
GroupAggregate
Group Key: c1
-> Sort
Sort Key: c1
-> Seq Scan on add_test_table
(5 rows)
SET hll.force_groupagg TO OFF;
EXPLAIN(COSTS OFF)
SELECT
c1, hll_add_agg(hll_hash_bigint(c2), 10, 4, 512, 0)
FROM
add_test_table
GROUP BY 1;
QUERY PLAN
----------------------------------
HashAggregate
Group Key: c1
-> Seq Scan on add_test_table
(3 rows)
SET hll.force_groupagg TO ON;
EXPLAIN(COSTS OFF)
SELECT
c1, hll_add_agg(hll_hash_bigint(c2), 10, 4, 512, 0)
FROM
add_test_table
GROUP BY 1;
QUERY PLAN
----------------------------------------
GroupAggregate
Group Key: c1
-> Sort
Sort Key: c1
-> Seq Scan on add_test_table
(5 rows)
RESET work_mem;
DROP TABLE tt1;
DROP TABLE add_test_table;
|
