bigquery 中的数组结构

Question

When calling the procedure below with input as array of struct, I am getting an error. Code has compiled fine but I'm getting error while calling.

CREATE OR REPLACE PROCEDURE `linear-charmer-344806.2143.Test4`(IN v_name_struct ARRAY<struct<roll numeric,dept string>>, OUT id ARRAY<STRING>)
begin 

for i in (select x.roll,x.dept from unnest(v_name_struct)as x)
do
update `linear-charmer-344806.2143.Employee` 
set salary='1000'
where roll=i.roll;
end for;

end;

DECLARE v_name_struct ARRAY<STRUCT<roll NUMERIC, dept STRING>> DEFAULT NULL;
DECLARE id ARRAY<STRING> DEFAULT NULL;
CALL `linear-charmer-344806.2143.Test4`([(2,'ECE')], id);--Getting error in this

Answer 1

Besides the comment about the output of your procedure. I think I will do the following to address your issue:

CREATE OR REPLACE PROCEDURE `projectid.dataset.proc_test4`(IN v_name_struct ARRAY<struct<roll numeric,dept string>>, OUT id ARRAY<STRING>)
begin 

for i in (select x.roll,x.dept from unnest(v_name_struct)as x)
do

    update `projectid.dataset.Employee_test4`
    set salary='1000'
    where roll=i.roll;

end for;

set id = (select [dept] from `projectid.dataset.Employee_test4` where salary="1000");

end;

As you can see below, you have to pass the variables you are setting in your procedure. In this case, if you do not pass numeric type you will get errors. You can use cast to convert the value to numeric .

DECLARE v_name_struct ARRAY<STRUCT<roll NUMERIC, dept STRING>> DEFAULT NULL;
DECLARE id ARRAY<STRING> DEFAULT NULL;

set v_name_struct = [(cast(2 as numeric),'ECE')];
CALL `projectid.dataset.proc_test4`(v_name_struct, id);
select id;

For additional information about cast you can check following link:

• Conversion Rules
• Conversion Functions - CAST