Conversions Involving DBTYPE_BYREF

OLE DB Programmer's Reference

The following table describes conversions to and from types modified by DBTYPE_BYREF. Type indicators X and Y are unmodified by DBTYPE_BYREF.

Source type indicator	Target type indicator	Notes
X	Y | DBTYPE_BYREF	If Y is a variable-length data type and the provider supports a conversion from X to Y, the provider must support this conversion. If Y is not a variable-length data type, it is provider-specific whether this conversion is supported. Any such conversions must follow the rules in this appendix. For information about further restrictions when memory is provider-owned, see the description of dwMemOwner in "DBBINDING Structures" in Chapter 6: Getting and Setting Data.
X | DBTYPE_BYREF	Y	If X equals Y, the provider must support this conversion.
		If X is not equal to Y, the provider supports this if and only if it supports a conversion from X to Y. Any such conversions must follow the rules in this appendix.
X | DBTYPE_BYREF	Y | DBTYPE_BYREF	The provider must support this conversion if it supports a conversion from X to Y | DBTYPE_BYREF. Any such conversions must follow the rules in this appendix.

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