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MDEV-14520: Custom aggregate functions work incorrectly with WITH ROLLUP clause

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Queries involving rollup need all aggregate function to have copy_or_same function where we create a copy
of item_sum items for each sum level.
Implemented copy_or_same function for the custom aggregate function class (Item_sum_sp)
This commit is contained in:
Varun Gupta
2018-05-17 17:19:33 +05:30
parent 7bf4a006b3
commit 89b1c2712a
6 changed files with 84 additions and 0 deletions
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30
mysql-test/main/custom_aggregate_functions.result
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@ -1123,3 +1123,33 @@ t1 CREATE TABLE `t1` (
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
DROP FUNCTION f1;
#
# MDEV-14520: Custom aggregate functions work incorrectly with WITH ROLLUP clause
#
create aggregate function agg_sum(x INT) returns INT
begin
declare z int default 0;
declare continue handler for not found return z;
loop
fetch group next row;
set z= z+x;
end loop;
end|
create table t1 (i int);
insert into t1 values (1),(2),(2),(3);
select i, agg_sum(i) from t1 group by i with rollup;
i agg_sum(i)
1 1
2 4
3 3
NULL 8
#
# Compare with
select i, sum(i) from t1 group by i with rollup;
i sum(i)
1 1
2 4
3 3
NULL 8
drop function agg_sum;
drop table t1;