1 files changed, 238 insertions, 0 deletions
diff --git a/mysql-test/main/win_percentile.test b/mysql-test/main/win_percentile.test
new file mode 100644
index 00000000..9626caff
--- /dev/null
+++ b/mysql-test/main/win_percentile.test
@@ -0,0 +1,238 @@
+CREATE TABLE t1 (name CHAR(10), test double, score DECIMAL(19,4));
+INSERT INTO t1 VALUES
+('Chun', 0, 3), ('Chun', 0, 7),
+('Kaolin', 0.5, 3), ('Kaolin', 0.6, 7),
+('Kaolin', 0.5, 4),
+('Tatiana', 0.8, 4), ('Tata', 0.8, 4);
+
+--echo #
+--echo # Test invalid syntax
+--echo #
+
+--echo # Order by clause has more than one element
+--error ER_PARSE_ERROR
+select percentile_disc(0.5) within group(order by score,test) over (partition by name) from t1;
+--error ER_PARSE_ERROR
+select percentile_cont(0.5) within group(order by score,test) over (partition by name) from t1;
+
+--echo # Order by clause has no element
+--error ER_PARSE_ERROR
+select percentile_disc(0.5) within group() over (partition by name) from t1;
+--error ER_PARSE_ERROR
+select percentile_cont(0.5) within group() over (partition by name) from t1;
+
+--echo # No parameters to the percentile functions
+--error ER_PARSE_ERROR
+select percentile_disc() within group() over (partition by name) from t1;
+--error ER_PARSE_ERROR
+select percentile_cont() within group() over (partition by name) from t1;
+
+
+
+--echo #
+--echo # Test simple syntax
+--echo #
+
+--sorted_result
+select name, percentile_cont(0.5)  within group(order by score) over (partition by name) as c from t1;
+--sorted_result
+select name, percentile_disc(0.5)  within group(order by score) over (partition by name) as c from t1;
+
+--echo # no partition clause
+--sorted_result
+select name, percentile_disc(0.5) within group(order by score)  over ()  from t1;
+--sorted_result
+select name, percentile_cont(0.5) within group(order by score)  over ()  from t1;
+
+--echo # argument set to null
+--error ER_WRONG_TYPE_OF_ARGUMENT
+select name, percentile_cont(null)  within group(order by score) over (partition by name) from t1;
+--error ER_WRONG_TYPE_OF_ARGUMENT
+select name, percentile_disc(null)  within group(order by score) over (partition by name) from t1;
+
+--disable_view_protocol
+--echo #subqueries having percentile functions
+--sorted_result
+select * from ( select name , percentile_cont(0.5) within group ( order by score) over (partition by name ) from t1 ) as t;
+--sorted_result
+select * from ( select name , percentile_disc(0.5) within group ( order by score) over (partition by name ) from t1 ) as t;
+--enable_view_protocol
+--sorted_result
+select name from t1 a where (select  percentile_disc(0.5) within group (order by score) over (partition by name) from t1 b limit 1) >= 0.5;
+
+--echo #disallowed fields in order by
+--error ER_WRONG_TYPE_FOR_PERCENTILE_FUNC
+select score,  percentile_cont(0.5)  within group(order by name) over (partition by score) from t1;
+
+#enable after fix MDEV-27871
+--disable_view_protocol
+select score,  percentile_disc(0.5)  within group(order by name) over (partition by score) from t1;
+--enable_view_protocol
+
+--echo #parameter value should be in the range of [0,1]
+--error ER_ARGUMENT_OUT_OF_RANGE
+select percentile_disc(1.5) within group(order by score) over (partition by name) from t1;
+--error ER_ARGUMENT_OUT_OF_RANGE
+select percentile_cont(1.5) within group(order by score) over (partition by name) from t1;
+
+--echo #Argument should remain constant for the entire partition
+--error ER_ARGUMENT_NOT_CONSTANT
+select name,percentile_cont(test) within group(order by score) over (partition by name) from t1;
+--error ER_ARGUMENT_NOT_CONSTANT
+select name, percentile_disc(test) within group(order by score) over (partition by name) from t1;
+
+--echo #only numerical types are allowed as argument to percentile functions
+--error ER_WRONG_TYPE_OF_ARGUMENT
+select name, percentile_cont(name) within group(order by score) over (partition by name) from t1;
+--error ER_WRONG_TYPE_OF_ARGUMENT
+select name, percentile_disc(name) within group(order by score) over (partition by name) from t1;
+
+--echo #complete query with partition column
+select name,cume_dist() over (partition by name order by score), percentile_disc(0.5)  within group(order by score) over (partition by name) as c from t1;
+select name, percentile_cont(0.5)  within group(order by score) over (partition by name) as c from t1;
+
+select name,cume_dist() over (partition by name order by score) as b, percentile_disc(0.1)  within group(order by score) over (partition by name) as c from t1;
+select name,cume_dist() over (partition by name order by score) as b, percentile_disc(0.2)  within group(order by score) over (partition by name) as c from t1;
+select name,cume_dist() over (partition by name order by score) as b, percentile_disc(0.3)  within group(order by score) over (partition by name) as c from t1;
+select name,cume_dist() over (partition by name order by score) as b, percentile_disc(0.4)  within group(order by score) over (partition by name) as c from t1;
+select name,cume_dist() over (partition by name order by score) as b, percentile_disc(0.5)  within group(order by score) over (partition by name) as c from t1;
+select name,cume_dist() over (partition by name order by score) as b, percentile_disc(0.6)  within group(order by score) over (partition by name) as c from t1;
+select name,cume_dist() over (partition by name order by score) as b, percentile_disc(0.7)  within group(order by score) over (partition by name) as c from t1;
+select name,cume_dist() over (partition by name order by score) as b, percentile_disc(0.8)  within group(order by score) over (partition by name) as c from t1;
+select name,cume_dist() over (partition by name order by score) as b, percentile_disc(0.9)  within group(order by score) over (partition by name) as c from t1;
+select name,cume_dist() over (partition by name order by score) as b, percentile_disc(1)  within group(order by score) over (partition by name) as c from t1;
+
+select median(score) over (partition by name), percentile_cont(0)  within group(order by score) over (partition by name) as c from t1;
+select median(score) over (partition by name), percentile_cont(0.1)  within group(order by score) over (partition by name) as c from t1;
+select median(score) over (partition by name), percentile_cont(0.2)  within group(order by score) over (partition by name) as c from t1;
+select median(score) over (partition by name), percentile_cont(0.3)  within group(order by score) over (partition by name) as c from t1;
+select median(score) over (partition by name), percentile_cont(0.4)  within group(order by score) over (partition by name) as c from t1;
+select median(score) over (partition by name), percentile_cont(0.5)  within group(order by score) over (partition by name) as c from t1;
+select median(score) over (partition by name), percentile_cont(0.6)  within group(order by score) over (partition by name) as c from t1;
+select median(score) over (partition by name), percentile_cont(0.7)  within group(order by score) over (partition by name) as c from t1;
+select median(score) over (partition by name), percentile_cont(0.8)  within group(order by score) over (partition by name) as c from t1;
+select median(score) over (partition by name), percentile_cont(0.9)  within group(order by score) over (partition by name) as c from t1;
+select median(score) over (partition by name), percentile_cont(1)  within group(order by score) over (partition by name) as c from t1;
+drop table t1;
+
+--echo #
+--echo # MDEV-13352: MEDIAN window function over a table with virtual column
+--echo #             in select with CTE and ORDER BY
+--echo #
+
+CREATE TABLE t1 (f1 int ,f2 int ,f3 int, f4 int, v1 int AS (-f4) virtual);
+INSERT INTO t1(f1,f2,f3,f4) VALUES
+  (1,10,100,10), (7,11,112,15), (3,14,121,12);
+
+WITH CTE AS (SELECT MIN(f3) OVER () FROM t1)
+SELECT  MEDIAN(f3) OVER () FROM t1
+ORDER BY f1, f2, f3, f4, v1;
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-15846: Sever crashed with MEDIAN() window function
+--echo #
+
+CREATE TABLE t1 ( pk int PRIMARY KEY, a1 int, a2 int);
+
+SELECT MEDIAN(`a1`) OVER (),
+       MEDIAN(`a2`) OVER (PARTITION BY `pk`)
+FROM t1;
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-17137: Syntax errors with VIEW using MEDIAN
+--echo #
+
+CREATE TABLE t1(val int);
+INSERT INTO t1 VALUES (1), (2), (3);
+CREATE VIEW v1 AS SELECT MEDIAN(val) OVER() FROM t1;
+select * from v1;
+select median(val) OVER () FROM t1;
+drop table t1;
+drop view v1;
+
+
+--echo #
+--echo # MDEV-20278 PERCENTILE_DISC() returns a wrong data type
+--echo #
+
+--echo # INT variants
+
+CREATE TABLE t1 (name CHAR(30), star_rating INT);
+INSERT INTO t1 VALUES ('Lord of the Ladybirds', 5);
+INSERT INTO t1 VALUES ('Lord of the Ladybirds', 3);
+INSERT INTO t1 VALUES ('Lady of the Flies', 1);
+INSERT INTO t1 VALUES ('Lady of the Flies', 2);
+INSERT INTO t1 VALUES ('Lady of the Flies', 5);
+CREATE OR REPLACE TABLE t2 AS SELECT name, PERCENTILE_DISC(0.5)
+  WITHIN GROUP (ORDER BY star_rating)
+  OVER (PARTITION BY name) AS pc FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2, t1;
+
+--echo # UNSIGNED INT variants
+
+CREATE OR REPLACE TABLE t1 (name CHAR(30), star_rating BIGINT UNSIGNED);
+INSERT INTO t1 VALUES ('Lord of the Ladybirds', 0x8000000000000005);
+INSERT INTO t1 VALUES ('Lord of the Ladybirds', 0x8000000000000003);
+INSERT INTO t1 VALUES ('Lady of the Flies', 0x8000000000000001);
+INSERT INTO t1 VALUES ('Lady of the Flies', 0x8000000000000002);
+INSERT INTO t1 VALUES ('Lady of the Flies', 0x8000000000000003);
+CREATE OR REPLACE TABLE t2 AS SELECT name, PERCENTILE_DISC(0.5)
+  WITHIN GROUP (ORDER BY star_rating)
+  OVER (PARTITION BY name) AS pc FROM t1;
+SHOW CREATE TABLE t2;
+SELECT name, pc, HEX(pc) FROM t2 ORDER BY name, pc;
+DROP TABLE t2, t1;
+
+--echo # FLOAT variants
+
+CREATE TABLE t1 (name CHAR(30), star_rating FLOAT);
+INSERT INTO t1 VALUES ('Lord of the Ladybirds', 5);
+INSERT INTO t1 VALUES ('Lord of the Ladybirds', 3);
+INSERT INTO t1 VALUES ('Lady of the Flies', 1);
+INSERT INTO t1 VALUES ('Lady of the Flies', 2);
+INSERT INTO t1 VALUES ('Lady of the Flies', 5);
+CREATE TABLE t2 AS SELECT name, PERCENTILE_DISC(0.5)
+  WITHIN GROUP (ORDER BY star_rating)
+  OVER (PARTITION BY name) AS pc FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2, t1;
+
+--echo # DECIMAL variants
+
+CREATE OR REPLACE TABLE t1 (name CHAR(30), star_rating DECIMAL(30,2));
+INSERT INTO t1 VALUES ('Lord of the Ladybirds', 50000000000);
+INSERT INTO t1 VALUES ('Lord of the Ladybirds', 30000000000);
+INSERT INTO t1 VALUES ('Lady of the Flies', 10000000000);
+INSERT INTO t1 VALUES ('Lady of the Flies', 20000000000);
+INSERT INTO t1 VALUES ('Lady of the Flies', 50000000000);
+CREATE OR REPLACE TABLE t2 AS SELECT name, PERCENTILE_DISC(0.5)
+  WITHIN GROUP (ORDER BY star_rating)
+  OVER (PARTITION BY name) AS pc FROM t1;
+SHOW CREATE TABLE t2;
+SELECT * FROM t2 ORDER BY name, pc;
+DROP TABLE t2, t1;
+
+
+--echo #
+--echo # MDEV-20280 PERCENTILE_DISC() rejects temporal and string input
+--echo #
+
+CREATE OR REPLACE TABLE t1 (name CHAR(30), star_rating TIME);
+INSERT INTO t1 VALUES ('Lord of the Ladybirds', 5);
+INSERT INTO t1 VALUES ('Lord of the Ladybirds', 3);
+INSERT INTO t1 VALUES ('Lady of the Flies', 1);
+INSERT INTO t1 VALUES ('Lady of the Flies', 2);
+INSERT INTO t1 VALUES ('Lady of the Flies', 5);
+SELECT name, PERCENTILE_DISC(0.5)
+  WITHIN GROUP (ORDER BY star_rating)
+  OVER (PARTITION BY name) AS pc FROM t1;
+SELECT name, PERCENTILE_DISC(0)
+  WITHIN GROUP (ORDER BY star_rating)
+  OVER (PARTITION BY name) AS pc FROM t1;
+SELECT name, PERCENTILE_DISC(1)
+  WITHIN GROUP (ORDER BY star_rating)
+  OVER (PARTITION BY name) AS pc FROM t1;
+DROP TABLE t1;