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MDEV-15073: Generic UDAF parser code in server for windows functions

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Added support for usual agreggate UDF (UDAF)
Added remove() call support for more efficient window function processing
Added example of aggregate UDF with efficient windows function support
This commit is contained in:
Oleksandr Byelkin
2018-11-20 10:58:34 +01:00
parent a956260d82
commit 555921a9c3
10 changed files with 386 additions and 0 deletions
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105
mysql-test/main/udf.result
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@ -465,3 +465,108 @@ a b
Hello HL
DROP FUNCTION METAPHON;
DROP TABLE t1;
MDEV-15073: Generic UDAF parser code in server for windows functions
CREATE AGGREGATE FUNCTION avgcost
RETURNS REAL SONAME "UDF_EXAMPLE_LIB";
CREATE AGGREGATE FUNCTION avg2
RETURNS REAL SONAME "UDF_EXAMPLE_LIB";
CREATE FUNCTION myfunc_double RETURNS REAL SONAME "UDF_EXAMPLE_LIB";
create table t1(pk int primary key,
a int,
sum int,
price float(24));
insert into t1 values
(1, 1, 100, 50.00),
(2, 1, 100, 100.00),
(3, 1, 100, 50.00),
(4, 1, 100, 50.00),
(5, 1, 100, 50.00),
(6, 1, 100, NULL),
(7, 1, NULL, NULL),
(8, 2, 2, 2),
(9, 2, 4, 4);
select pk, a, sum, price, avgcost(sum, price) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
from t1;
pk a sum price avgcost(sum, price) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
1 1 100 50 75.0000
2 1 100 100 66.6667
3 1 100 50 66.6667
4 1 100 50 50.0000
5 1 100 50 50.0000
6 1 100 NULL 50.0000
7 1 NULL NULL 0.0000
8 2 2 2 3.3333
9 2 4 4 3.3333
select pk, a, sum, price, avgcost(sum, price) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
from t1;
pk a sum price avgcost(sum, price) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
1 1 100 50 50.0000
2 1 100 100 75.0000
3 1 100 50 75.0000
4 1 100 50 50.0000
5 1 100 50 50.0000
6 1 100 NULL 50.0000
7 1 NULL NULL 0.0000
8 2 2 2 2.0000
9 2 4 4 3.3333
select pk, a, sum, price, avg2(sum, price) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
from t1;
pk a sum price avg2(sum, price) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
1 1 100 50 0.7500
2 1 100 100 0.6667
3 1 100 50 0.6667
4 1 100 50 0.5000
5 1 100 50 0.5000
6 1 100 NULL 0.5000
7 1 NULL NULL 0.0000
8 2 2 2 1.0000
9 2 4 4 1.0000
select pk, a, sum, price, avg2(sum, price) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
from t1;
pk a sum price avg2(sum, price) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
1 1 100 50 0.5000
2 1 100 100 0.7500
3 1 100 50 0.7500
4 1 100 50 0.5000
5 1 100 50 0.5000
6 1 100 NULL 0.5000
7 1 NULL NULL 0.0000
8 2 2 2 1.0000
9 2 4 4 1.0000
select pk, a, sum, price, tttttttt(sprice,sum) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
from t1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
from ' at line 1
select pk, a, sum, price, myfunc_double(sum) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
from t1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
from ' at line 1
select pk, a, sum, price, round(sprice,sum) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
from t1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
from ' at line 1
select pk, a, sum, price, myfunc_double(sum) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
from t1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
from ' at line 1
set @save_sql_mode = @@sql_mode;
set sql_mode="oracle";
select pk, a, sum, price, avg2(sum, price) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
from t1;
pk a sum price avg2(sum, price) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 0 FOLLOWING)
1 1 100 50 0.5000
2 1 100 100 0.7500
3 1 100 50 0.7500
4 1 100 50 0.5000
5 1 100 50 0.5000
6 1 100 NULL 0.5000
7 1 NULL NULL 0.0000
8 2 2 2 1.0000
9 2 4 4 1.0000
set sql_mode= @save_sql_mode;
drop table t1;
DROP FUNCTION avgcost;
DROP FUNCTION avg2;
DROP FUNCTION myfunc_double;