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.

Show: