Restrictions on the Use of Datatypes

SourcePro DB : DB Access Module for Oracle OCIUser’s Guide : Technical Information : Datatypes : Restrictions on the Use of Datatypes

Oracle servers place restrictions on the use of certain datatypes. Where possible, the DB Interface Module is flexible about datatypes. However, there are situations where conversions are not possible, and in these cases your application must be aware of the contexts in which certain datatypes can be used. Table 3 outlines the 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	Oracle's TIMESTAMP datatype supports dates from January 1, 4712 BC through December 31, 9999, 23:59:59.999, but RWDateTime is limited to dates since September, 14, 1752. Further, Oracle’s TIMESTAMP datatype can hold fractional seconds with a precision of 0 through 9, but RWDateTime is limited to milliseconds.
TimeTuple	No restrictions
TimeTupleOffset	Not supported
Decimal	No restrictions
Double	No restrictions
Duration	Not supported by DB Access Module for Oracle OCI
Float	No restrictions
Int UnsignedInt	No restrictions
Long UnsignedLong	No restrictions
LongLong UnsignedLongLong	No restrictions
MBString UString WString	Limited to 4,000 bytes
LongDouble	No restrictions
Short UnsignedShort	No restrictions
String	No restrictions