Snowflake: Conversion error of an teradata query to snow sql - sql

Question

I have a Teradata query (updated the fields with sample values):
select (case '-' when '-' then '-' ||'04' || ':' ||'00'
else '04' || ':' ||'00'
end (Interval hour to minute)) +
(case
'2400' when '2400' then 24
else 0
end (interval hour));
output : -04:00 (varchar type)
select (case '-' when '-' then '-' ||'04' || ':' ||'00'
else '04' || ':' ||'00'
end (Interval hour to minute)) +
(case
'1835' when '2400' then 24
else 0
end (interval hour));
output: 20:00 (varchar type)
Want to convert the same in snowflake, but the same output value was not able to insert in snowflake varchar column:
SELECT
(CASE SUBSTR(raw_data, 48, 1)
WHEN '-' THEN CONCAT('-' , SUBSTR(raw_data,49,2) , ':' , SUBSTR(raw_data,51,2))
ELSE CONCAT(SUBSTR(raw_data,49,2) , ':' , SUBSTR(raw_data,51,2)) END) +
(CASE SUBSTR(raw_data,40,4) WHEN '2400' THEN 24 ELSE 0 END)
AS COLUMN_1
FROM
(SELECT temp_row.$1 as raw_data from
#JOB_MANAGEMENT.SNOWFALKE (file_format => 'DB.TBL_FILE_FORMAT',
pattern=>'.*/input_file.txt') temp_table) temp;
Sample:
SELECT
(CASE '-' WHEN '-'
THEN CONCAT('-' , '04 , ':' , '00')
ELSE CONCAT('04' , ':' , '00') END) +
(CASE '1825' WHEN '2400' THEN 24 ELSE 0 END)
Output : -04:00 (column type - varchar) -> but throwing error in snowflake.
Numeric value '-04:00' is not recognized

Answer 1

Instead of trying to rewrite query 1:1, this approach focuses on rewriting the logic using TIME_FROM_PARTS:
SELECT
CASE WHEN SUBSTR(raw_data, 48, 1) = '-'
THEN TIME_FROM_PARTS(24-SUBSTR(raw_data,49,2)::INT, SUBSTR(raw_data,51,2)::INT, 0)
ELSE TIME_FROM_PARTS(SUBSTR(raw_data,49,2)::INT, SUBSTR(raw_data,51,2)::INT, 0)
END
FROM ...