Expressions passed to this function must have the following data types:
- date_timestamp_value = DATE or TIMESTAMP(0)
- day_value = VARCHAR
You can also pass arguments with data types that can be converted to the above types using the implicit data type conversion rules that apply to UDFs.
For details, see “Compatible Types” in Teradata Vantage™ - SQL External Routine Programming , B035-1147 .
Since TIMESTAMP values are stored in UTC time within the database and lack a time zone, the session time zone is used to interpret the time stamp value within the function. For TIMESTAMP WITH TIME ZONE values, the time zone component is used to interpret the time stamp value within the function.