How to escape comma character in a javascript procedure in wherescape, snowflake? - snowflake-cloud-data-platform

Question

I have a table with 2 columns:
Tablename
Fieldname
tbl
name
tbl
LastName
I need to display one row, having Fieldname values concatenated:
tbl --> name, lastName
So, I am using Listagg fct to concatenate the values :
listagg (fieldname,',') as newCol.
Running this command in Snowflake, works fine and displays want i need.
But, because we are using Wherescape to create procedures, adding this function in a javascript procedure, fails, because of COMMA separator used in listagg fct.
I tried with different escape characters, but nothing worked. (/,,/[])..
If I change the character in &,* it works, but I have to use comma.
Creating the newCol with listagg with & instead of ",", works and if I use a replace fct to change it to ",", it fails again :(
What should I use to have COMMA between the values for the newCol.
It is mandatory to have COMMA, because the column will be used in an update statement.
EDIT:
CREATE OR REPLACE PROCEDURE sp_myprocedure_test()
RETURNS VARCHAR(16777216)
language javascript
execute as CALLER
as
$$
const generateUpdStmt = ` SELECT 'UPDATE tbl SET ' || c.col_update AS STMT_SQL
,c.col_update
FROM (
select TABLE_NAME
, listagg (concat(field_name, ' = ''#tst''' ), ' , ') within group (order by TABLE_NAME, field_name asc) as col_update
from tbl
group by TABLE_NAME
) c
;`;
try {
var return_value = "Init: ";
var stmt_update = snowflake.createStatement({sqlText: generateUpdStmt});
var result_stmt = stmt_update.execute();
while (result_stmt.next())
{
var result_stmt_value_2 = result_stmt.getColumnValue(2);
return_value += result_stmt_value_2 + "\n";
}
result = " Status: Succeeded. \n";
}
catch (err) {
result = "Failed: Code:" + err.code + "\n State: " + err.state;
result += "\n Message: " + err.message;
result += "\nStack Trace:\n" + err.stackTraceTxt;
return result;
}
return return_value;
$$
EDIT 2:
Returning result in wherescape with "&" instead of "," delimiter:
enter image description here
Returning result in wherescape with "," delimiter:
enter image description here

Answer 1

I created a minimal tbl table and when I run this:
SELECT 'UPDATE tbl SET ' || c.col_update AS STMT_SQL
,c.col_update
FROM (
select TABLE_NAME
, listagg (concat(field_name, ' = ''#tst''' ), ' , ') within group (order by TABLE_NAME, field_name asc) as col_update
from tbl
group by TABLE_NAME
) c ;
I get the following result:
+--------------------------------------------------+-----------------------------------+
| STMT_SQL | COL_UPDATE |
+--------------------------------------------------+-----------------------------------+
| UPDATE tbl SET LastName = '#tst' , name = '#tst' | LastName = '#tst' , name = '#tst' |
+--------------------------------------------------+-----------------------------------+
I see your JS returns the same values. I edited it to return both columns as one string:
CREATE OR REPLACE PROCEDURE sp_myprocedure_test()
RETURNS VARCHAR(16777216)
language javascript
execute as CALLER
as
$$
const generateUpdStmt = ` SELECT 'UPDATE tbl SET ' || c.col_update AS STMT_SQL
,c.col_update
FROM (
select TABLE_NAME
, listagg (concat(field_name, ' = ''#tst''' ), ' , ') within group (order by TABLE_NAME, field_name asc) as col_update
from tbl
group by TABLE_NAME
) c
;`;
try {
var return_value = "";
var stmt_update = snowflake.createStatement({sqlText: generateUpdStmt});
var result_stmt = stmt_update.execute();
while (result_stmt.next())
{
return_value += result_stmt.getColumnValue(1) + " | " + result_stmt.getColumnValue(2);
}
}
catch (err) {
result = "Failed: Code:" + err.code + "\n State: " + err.state;
result += "\n Message: " + err.message;
result += "\nStack Trace:\n" + err.stackTraceTxt;
return result;
}
return return_value;
$$
call sp_myprocedure_test();
+--------------------------------------------------------------------------------------+
| SP_MYPROCEDURE_TEST |
+--------------------------------------------------------------------------------------+
| UPDATE tbl SET LastName = '#tst' , name = '#tst' | LastName = '#tst' , name = '#tst' |
+--------------------------------------------------------------------------------------+
Can you tell me what is expected?