Conversions Involving DBTYPE_BYREF
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. |
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. |