Example: CASE Expression Fails

Teradata Vantageā„¢ SQL Functions, Expressions, and Predicates

brand
Software
Teradata Vantage
prodname
Teradata Database
Teradata Vantage NewSQL Engine
vrm_release
16.20
category
Programming Reference
featnum
B035-1145-162K

In the following statement, the CASE expression fails when column_2 contains the value 1 and column_3 contains the value 11223344556677889900.12 because the result is a DECIMAL value that requires more than 38 digits of precision:

   SELECT SUM (CASE
                WHEN column_2=1 
                THEN column_3 * 6.112233445566778800000
                ELSE column_3
               END )
   FROM dec22;