Passing data parameters on SSRS using snowflake datasoruce [duplicate] - sql

Question

We are migrating the SQL Server SSRS reports to Snowflake; I have a question about parameters in SQL version -
select *
from tbname
where xtype in (#xtype)
How to write this in the Snowflake version?

Answer 1

In Snowflake you set a variable using the SET command and then reference it in SQL statements by prefixing it with $ e.g.
set (min, max)=(40, 70);
select $min;
select avg(salary) from emp where age between $min and $max;
This is documented here: https://docs.snowflake.com/en/sql-reference/session-variables.html

Answer 2

It is possible to pass multiple values to Snowflake from the report using ODBC driver:
? used as a parameter placeholder
multiple values are provided as a single concatenated string, therefore in the main query they are splitted SPLIT_TO_TABLE
SELECT *
FROM TBNAME
WHERE XTYPE IN (
SELECT t.value
FROM TABLE(SPLIT_TO_TABLE(?, '^')) AS t
)
The direct translation of SQL Server version will not work and error out:
SELECT *
FROM TBNAME
WHERE XTYPE IN (?)
Cannot add multi value query parameter '?' for dataset 'TBNAME' because it is not supported by the data extension.
Snowflake setup:
CREATE OR REPLACE TABLE TEST.TBNAME AS
SELECT 1 AS XTYPE, 'A' AS col, 'GB' AS country UNION
SELECT 2 AS XTYPE, 'B' AS col, 'BE' AS country UNION
SELECT 3 AS XTYPE, 'C' AS col, 'CH' AS country;
Report side:
Parameter:
Sample input values:
Dataset definition:
Dataset parameter (expression: =JOIN(Parameters!Param_XType.Value, "^")):
Report test: