When a byte data type is the source type of a conversion using CAST syntax or Teradata Conversion syntax, the target data type must also be a byte type.
To convert a BYTE(1) or BYTE(2) data type to INTEGER, you can use the HASHBUCKET function.
Consider the following table definition:
CREATE TABLE ByteData(b1 BYTE(1), b2 BYTE(2));
To convert column b1 to INTEGER regardless of the system setting of the hash bucket size, use the following:
SELECT HASHBUCKET('00'XB || b1 (BYTE(4))) / ((HASHBUCKET()+1)/65536) FROM ByteData;
To convert column b2 to INTEGER regardless of the system setting of the hash bucket size, use the following:
SELECT HASHBUCKET(b2 (BYTE(4))) / ((HASHBUCKET()+1)/65536) FROM ByteData;