Here are the default result type and attributes for TRIM(string_expression):
- If string_expression is a byte string, the result type is VARBYTE.
- If the string_expression is a numeric expression or character string, the result type is VARCHAR.
It is possible for the length of the result to be zero.
The server character set of the result is the same as the argument.
If the string_expression argument is null, the result is null.