Getting same value for all records in snowflake - snowflake-cloud-data-platform

Question

I have key_value table and key table. I have to load only key from key_value table and insert into key table using snowflake procedure. I have written below code. After executing it i am getting same key value in key table rather all the keys.
create or replace procedure proc_key_load()
returns varchar
language javascript
as
$$
var query=`select key from key_value`;
var ret=snowflake.createStatement( {sqlText: query}).execute();
var length=ret.getRowCount();
var counter=0;
while(counter<length){
ret.next();
var value=ret.getColumnValue(1);
var load_query=`insert into key_load values(` + value +`)`;
var ret=snowflake.createStatement( {sqlText: load_query}).execute();
counter += 1;
}
return 'SUCCESS';
$$

Answer 1

I didn't test it but as I see that you redefine "ret" in the loop. Try with assigning different variable:
create or replace procedure proc_key_load()
returns varchar
language javascript
as
$$
var query=`select key from key_value`;
var ret=snowflake.createStatement( {sqlText: query}).execute();
var length=ret.getRowCount();
var counter=0;
while(counter<length){
ret.next();
var value=ret.getColumnValue(1);
var load_query=`insert into key_load values(` + value +`)`;
var ret2 = snowflake.createStatement( {sqlText: load_query}).execute();
counter += 1;
}
return 'SUCCESS';
$$
Update: I tested the above code and it works. If you just need to copy some data from one table to another, you can just plain SQL right? Something like:
INSERT INTO key_load SELECT key FROM key_value;
Anyway, if you really need to use the above procedure, you can write it in a more efficient way:
create or replace procedure proc_key_load()
returns varchar
language javascript
as
$$
var query=`select key from key_value`;
var ret=snowflake.createStatement( {sqlText: query}).execute();
while(ret.next()){
var value=ret.getColumnValue(1);
var load_query=`insert into key_load values(?)`;
snowflake.createStatement( {sqlText: load_query, binds:[value] }).execute();
}
return 'SUCCESS';
$$;