17.10 - Argument Types and Rules - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - Data Types and Literals

Advanced SQL Engine
Teradata Database
Release Number
Release Date
July 2021
Content Type
Programming Reference
Publication ID
English (United States)
Expressions passed to this function must have the following data types:
  • instring = VARCHAR or CLOB
  • in_encoding = VARCHAR(64)

The two input parameters to TO_BYTES must use the same character set. The parameters cannot use different character sets, such as Latin and Unicode.

If in_encoding is not one of the supported encodings, an error is returned.

If either instring or in_encoding is NULL, the result is NULL.

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.

The UDF implicit type conversion rules are more restrictive than the implicit type conversion rules normally used by Vantage. If an argument cannot be converted to the required data type following the UDF implicit conversion rules, it must be explicitly cast.

The maximum input or output for CLOB or BLOB size is 2 GB. An error is reported if the size is exceeded.

The TO_BYTES function converts from a character string to a VARBYTE. The character strings are treated as positive unless there is an explicit negative sign. Byte strings are interpreted as negative if the high order bit is 1.

TO_BYTES should not be used for byte to byte encodings, since TO_BYTES tries to interpret the sign of the byte string.

If you must use byte to byte conversion, use the two TO_BYTE functions. (Note the syntax is TO_BYTE, not TO_BYTES.)