Calling a procedure inside a procedure with independent sessions - snowflake-cloud-data-platform

Question

I am trying to call a procedure inside a procedure but this gives me an error like:
Uncaught exception of type 'STATEMENT_ERROR' on line 19 at position 2 : This session warehouse WH_STD_EDWQA_ANALYST no longer exists.
My parent procedure construct is like creating a warehouse & the child procedure is to populate a metadata table(custom) by use of table(result_scan(last_query_id())).
Parent procedure construct:
create or replace procedure wh_resource_govern(type varchar, env varchar, ..., varchar)
returns varchar not null
language sql
as
$$
declare
wh_name varchar;
wh_setup varchar;
lv_acct_name varchar;
begin
wh_name := 'WH_' || type || '_' || env || '_' || team;
wh_setup := 'CREATE OR REPLACE WAREHOUSE' || ' ' || wh_name || ' ' || 'WITH' || ' '
|| 'WAREHOUSE_SIZE = ' || v_wh_size || ' '
...,
|| 'COMMENT= '|| '"' || v_created_by || '"' ;
execute immediate wh_setup;
commit;
call load_all_warehouse_metadata('a', 'b', 'c'); ----> This is where it is getting stuck.
end;
$$
;
Child procedure construct is given as below:
create or replace procedure load_all_warehouse_metadata(wh_type varchar, wh_env varchar, wh_team varchar)
returns varchar not null
language sql
as
$$
declare
lv_acct_name varchar;
begin
select current_account() into lv_acct_name;
show warehouses;
insert into ALL_WAREHOUSE_METADATA (account_name, warehouse_type, .., .., )
select :lv_acct_name, :wh_type, :wh_env, :wh_team, "name", ..., ...,
from table(result_scan(last_query_id()));
end;
$$
;
Any inputs on how to address this would be really helpful.

Answer 1

Creating a warehouse immediately makes it the current warehouse for the session, example:
create or replace warehouse FOO;
select current_warehouse(); -- FOO
drop warehouse FOO();
select current_warehouse(); -- NULL
When you run execute immediate wh_setup; in the first SP, it's setting the session's warehouse to the one you just created. Calling a child SP using owner's rights (default) from a warehouse that isn't the one that started the SP is causing context problems for the warehouse.
You can reproduce this error as follows:
create or replace procedure SP1()
returns varchar not null
language sql
--execute as caller
as
$$
declare
currentWarehouse varchar;
begin
select current_warehouse() into currentWarehouse;
create or replace warehouse FOO;
call SP2();
return currentWarehouse;
end;
$$;
create or replace procedure SP2()
returns varchar not null
language sql
--execute as caller
as
$$
declare
currentWarehouse varchar;
begin
select current_warehouse() into currentWarehouse;
create or replace temp table FOO(s string);
insert into FOO(S) values ('Bar');
return 'Done';
end;
$$;
call SP1();
You can fix this code sample immediately by uncommenting the two commented-out ownership options for SP1 and SP2:
--execute as caller (Remove the comment markers and recreate both SPs.)
You can also run a SQL command to use warehouse <wh_name> in your SP(s), but you must run the SP as caller in order to change warehouse context this way.