--source include/default_optimizer_switch.inc

flush status;
show  status like "%custom_aggregate%";
create table t2 (sal int(10));
create table t3 (sal int(10),id int);
insert into t3 values (0,1),(1,2),(2,3),(3,4);
delimiter |;

create aggregate function f1(x INT) returns int
begin
  declare tot_sum int default 0;
  declare continue handler for not found return tot_sum;
  loop
    fetch group next row;
    set tot_sum= tot_sum + x;
  end loop;
end|

create aggregate function f2 (x int) returns int
begin
  declare counter int default 0;
  declare continue handler for not found return 0;
  loop
    fetch group next row;
    set counter =counter + (select f1(sal) from t1); 
  end loop;
end|

delimiter ;|

create table t1 (sal int(10),id int(10));
INSERT INTO t1 (sal,id) VALUES (5000,1);
INSERT INTO t1 (sal,id) VALUES (2000,2);
INSERT INTO t1 (sal,id) VALUES (1000,3);

--echo Normal select with custom aggregate function
select f1(sal) from t1 where id>= 1;
show  status like "%custom_aggregate%";


--echo subqueries with custom aggregates
explain
select * from t1, (select f1(sal) as a  from t1 where id>= 1) q where q.a=t1.sal;
show  status like "%custom_aggregate%";

explain
select * from t1, (select sal as a from t1 where (select f1(t3.sal) from t3) >=-1 ) q where q.a=t1.sal;
show  status like "%custom_aggregate%";

explain
select (select f1(sal) as a from t3 where t3.id= t1.id )  from t1 ;
show  status like "%custom_aggregate%";

explain
select (select f1(sal) as a from t3 where t3.id= t1.id )  from t1 ;
show  status like "%custom_aggregate%";

--echo custom aggregates inside other customm aggregates

explain
select f2(sal) from t1;
show  status like "%custom_aggregate%";

--echo cte with custom aggregates

with agg_sum as (
  select f1(sal) from t1 where t1.id >=1 group by t1.id
)
select * from agg_sum;
show  status like "%custom_aggregate%";

drop table t2,t1,t3;
drop function f1;
drop function f2;
