Restrictions on the Use of Datatypes
Neither the DB Interface Module nor the ODBC specification impose restrictions on the use of most datatypes, but individual ODBC drivers may. Check for specific restrictions in the documentation provided with your ODBC driver. Table 3 outlines the known restrictions associated with each DB Interface Module type.
Table 3 – Restrictions on the use of DB Interface Module datatypes 
RWDBValue::ValueType
Restrictions
Blob
No restrictions
Char, UnsignedChar
No restrictions
Date
No restrictions
DateTime
No restrictions
TimeTuple
No restrictions
TimeTupleOffset
This datatype is not supported
Decimal
No restrictions
Double
No restrictions
Duration
No restrictions
Float
No restrictions
Int, UnsignedInt
No restrictions
Long, UnsignedLong
No restrictions
LongLong, UnsignedLongLong
No restrictions
MBString
This datatype is not supported
String
No restrictions
Short, UnsignedShort
No restrictions
WString
UString
This datatype may not be supported—check your driver documentation. Refer to Internationalization for more information.
LongDouble
For input binding, long double value inserted should be in range of what database supports. Please check your database documentation for details.