Processing aborted due to error Snowflake - stored-procedures

Question

I've encountered this error:
Execution error in stored procedure: SQL execution internal error: Processing aborted due to error at Snowflake.execute
when running this script:
CREATE OR REPLACE PROCEDURE DATES_TABLE (INITIALDATE VARCHAR, FINALDATE VARCHAR)
RETURNS VARCHAR
LANGUAGE JAVASCRIPT
EXECUTE AS CALLER
AS
$$
var DATESDIFF = (Date.parse(formatDate(FINALDATE)) - Date.parse(formatDate(INITIALDATE)))/ (1000 * 3600 * 24);
snowflake.execute(
{
sqlText: ` CREATE OR REPLACE TEMPORARY TABLE TEMP_DATE_RANGE AS SELECT DATE FROM (
SELECT
CAST(DATEADD (DAY, DatesDiff.n, :1) AS DATE) AS DATE
FROM (
SELECT
ROW_NUMBER() OVER (ORDER BY 1) - 1
FROM
TABLE (generator (rowcount => :3))) DatesDiff (n)
); `,
binds: [formatDate(INITIALDATE), formatDate(FINALDATE), DATESDIFF]
}
);
function formatDate(date) {
var d = new Date(date),
month = '' + (d.getMonth() + 1),
day = '' + d.getDate(),
year = d.getFullYear();
if (month.length < 2)
month = '0' + month;
if (day.length < 2)
day = '0' + day;
return [year, month, day].join('-');
}
$$
;
CALL DATES_TABLE('2021-04-01','2021-05-24');
Which when ran outside of the stored procedure, creates a table with dates between the range inputted.
Any idea why this is happening, how to sort it out?

Answer 1

The problem is in binding a variable to TABLE (generator (rowcount => :3)), as Snowflake expects a constant there.
Instead, you could do something like:
SELECT ROW_NUMBER() OVER (ORDER BY 1) - 1 AS rn
FROM TABLE (generator (rowcount => 1000))
QUALIFY rn < :2
I did some cleanup, and this works:
CREATE OR REPLACE PROCEDURE DATES_TABLE (INITIALDATE VARCHAR, FINALDATE VARCHAR)
RETURNS VARCHAR
LANGUAGE JAVASCRIPT
EXECUTE AS CALLER
AS
$$
var DATESDIFF = (Date.parse(formatDate(FINALDATE)) - Date.parse(formatDate(INITIALDATE)))/ (1000 * 3600 * 24);
snowflake.execute(
{
sqlText: `
CREATE OR REPLACE TEMPORARY TABLE TEMP_DATE_RANGE AS
SELECT CAST(DATEADD(DAY, DatesDiff.rn, :1) AS DATE) AS DATE
FROM (
SELECT ROW_NUMBER() OVER (ORDER BY 1) - 1 AS rn
FROM TABLE (generator (rowcount => 1000))
QUALIFY rn < :2
)
;`
, binds: [formatDate(INITIALDATE), DATESDIFF]
}
);
function formatDate(date) {
var d = new Date(date),
month = '' + (d.getMonth() + 1),
day = '' + d.getDate(),
year = d.getFullYear();
if (month.length < 2)
month = '0' + month;
if (day.length < 2)
day = '0' + day;
return [year, month, day].join('-');
}
$$
;
CALL DATES_TABLE('2021-04-01','2021-05-24');
select * from TEMP_DATE_RANGE;
For a shorter way of generating a sequence of dates, see my answer to https://stackoverflow.com/a/66449068/132438.