using variables to create tasks in snowflake - snowflake-cloud-data-platform

Question

I want to use variables while creating tasks in snowflake. Below for example:
Instead of this:
CREATE OR REPLACE TASK BEAST_DSC_SBX.DSC_STG.DTCI_DSC_R2O_AVAIL_INCREMENTAL_TRUNCATE
WAREHOUSE = 'BEAST_DSC_ADHOC_WH_SBX' SCHEDULE = '10 MINUTE' WHEN SYSTEM$STREAM_HAS_DATA('BEAST_DSC_SBX.KAFKA.DTCI_DSC_R2O_AVAIL_CHANGES') = True
AS
TRUNCATE TABLE BEAST_DSC_SBX.DSC_STG.DTCI_DSC_R2O_AVAIL_INCREMENTAL;
I want to use this:
SET STG_SCHEMA_NAME = 'BEAST_DSC_SBX.DSC_STG';
SET KAFKA_SCHEMA_NAME = 'BEAST_DSC_SBX.KAFKA';
CREATE OR REPLACE TASK $STG_SCHEMA_NAME.DTCI_DSC_R2O_AVAIL_INCREMENTAL_TRUNCATE
WAREHOUSE = $WAREHOUSE SCHEDULE = '10 MINUTE' WHEN SYSTEM$STREAM_HAS_DATA($KAFKA_SCHEMA_NAME'.DTCI_DSC_R2O_AVAIL_CHANGES') = True
AS
TRUNCATE TABLE $STG_SCHEMA_NAME.DTCI_DSC_R2O_AVAIL_INCREMENTAL;
I am getting errors while executing the above. is it even possible to variablize snowflake tasks? if yes, how?

Answer 1

You cannot create the task name with a combination of both text and variable in the Snowflake UI. That doesn't work.
The workaround is to use SnowSQL and use this format:
&{<variable>}_<TEXT>
Please refer to this KB article as an example: https://community.snowflake.com/s/article/How-to-use-variable-when-creating-user-account-in-Snowflake-UI-and-SnowSQL
In the KB article above, we show that you can combine the text and variable in the SnowSQL like so:
create USER &{DIV}_LOCAL_&{ENV}_ADMIN`
PASSWORD = '&passwd'
LOGIN_NAME = '&{DIV}_LOCAL_&{ENV}_ADMIN'
COMMENT = "&DIV &ENV local account admin user"
DISPLAY_NAME = '&{DIV}_LOCAL_&{ENV}_ADMIN'
FIRST_NAME = '&{DIV}_LOCAL_&{ENV}_ADMIN'
LAST_NAME = '&{DIV}_LOCAL_&{ENV}_ADMIN'
EMAIL = 'test#test.com'
MUST_CHANGE_PASSWORD = TRUE;
The example above is to create a user, you can adopt the SQL statement for creating a task.