CREATE OR REPLACE TABLE FUNCTION `invoicemaker-f5e1d.mini_accountant.transactions_slice_by_range`(
    fromDate DATE, 
    toDate DATE
) AS (
    -- the code of the table function
)

SELECT * FROM `invoicemaker-f5e1d.mini_accountant.transactions_slice_by_range`(
    PARSE_DATE("%Y%m%d",@DS_START_DATE), 
    PARSE_DATE("%Y%m%d", @DS_END_DATE)
);