Snowflake's get_ddl displays extra single quotes everywhere - snowflake-cloud-data-platform

Question

In Snowflake, when I create a store proc like so
create procedure stack_overflow_question(select_table varchar)
returns varchar
language sql
as
declare
select_statement varchar;
begin
select_statement := '
SELECT * FROM ' || :select_table || '
';
end;
Then, later when I use select get_ddl('procedure', 'stack_overflow_question(varchar)'); function to make edits to the store proc, the result of this function call has extra single quotes.
Here is the result
CREATE OR REPLACE PROCEDURE "STACK_OVERFLOW_QUESTION"("SELECT_TABLE" VARCHAR(16777216))
RETURNS VARCHAR(16777216)
LANGUAGE SQL
EXECUTE AS OWNER
AS 'declare
select_statement varchar;
begin
select_statement := ''
SELECT * FROM '' || :select_table || ''
'';
end';
Note the difference between the two! The extra single quotes. Also double quotes in the name of the store proc.
Is there something that I can do to prevent this from happening? I am using Snowsight - but don't think that this actually is the problem. Also, I am using snowflake as the language for store procs.
Any ideas?

Answer 1

I wrote a UDF that you can wrap around get_ddl that will convert the DDL from using doubled single quotes to single quotes and wrap the body with $$:
create or replace function CODE_DDL_TO_TEXT(CODE_TEXT string)
returns string
language javascript
as
$$
var lines = CODE_TEXT.split("\n");
var out = "";
var startCode = new RegExp("^AS '$", "ig");
var endCode = new RegExp("^'\;$", "ig");
var inCode = false;
var isChange = false;
var s;
for (i = 0; i < lines.length; i++){
isChange = false;
if(!inCode) {
inCode = startCode.test(lines[i]);
if(inCode) {
isChange = true;
out += "AS $" + "$\n";
}
}
if (endCode.test(lines[i])){
out += "$" + "$;";
isChange = true;
inCode = false;
}
if(!isChange){
if(inCode){
s = lines[i].replace(/''/g, "'") + "\n";
s = s.replace(/\\\\/g, "\\");
out += s;
} else {
out += lines[i] + "\n";
}
}
}
return out;
$$;
You can then call the UDF by wrapping it around the get_ddl function. Here is an example of fishing its own DDL out of get_ddl:
select CODE_DDL_TO_TEXT(get_ddl('function', 'CODE_DDL_TO_TEXT(string)'));
Edit:
You can also use this SQL to reconstruct a stored procedure from the INFORMATION_SCHEMA:
select 'create or replace procedure ' || PROCEDURE_NAME || ARGUMENT_SIGNATURE ||
'\nreturns ' || DATA_TYPE ||
'\nlanguage ' || PROCEDURE_LANGUAGE ||
'\nas $' || '$\n' ||
PROCEDURE_DEFINITION ||
'\n$' || '$;'
from INFORMATION_SCHEMA.PROCEDURES
;

Answer 2

This only returns body -
SELECT PROCEDURE_DEFINITION
FROM INFORMATION_SCHEMA.PROCEDURES
WHERE PROCEDURE_SCHEMA = 'SCHEMA_NAME' AND PROCEDURE_NAME = upper('stack_overflow_question');