DBPROP_ALTERCOLUMN
Property group: Data Source Information
Property set: DBPROPSET_DATASOURCEINFO
Type: VT_I4
Typical R/W: R
Description: Alter Column Support
Comprises a bitmask describing which portions of the DBCOLUMNDESC structure can be used in a call to IAlterTable::AlterColumn.
Value is a combination of one or more of the following:
DBCOLUMNDESCFLAGS_TYPENAME
DBCOLUMNDESCFLAGS_ITYPEINFO
DBCOLUMNDESCFLAGS_PROPERTIES
DBCOLUMNDESCFLAGS_CLSID
DBCOLUMNDESCFLAGS_COLSIZE
DBCOLUMNDESCFLAGS_DBCID
DBCOLUMNDESCFLAGS_WTYPE
DBCOLUMNDESCFLAGS_PRECISION
DBCOLUMNDESCFLAGS_SCALE
For more information about the mapping of these values to fields in the DBCOLUMNDESC structure, see the description of the dwColumnDescFlags parameter in the reference entry for IAlterTable::AlterColumn.