ICommandWithParameters

Providers that support parameters must support ICommandWithParameters. Any provider that returns DBPROPVAL_SQL_ANSI92_INTERMEDIATE or DBPROPVAL_SQL_ANSI92_FULL for the DBPROP_SQLSUPPORT property can support parameters.

This optional interface encapsulates parameters. Parameters are scalar values, or a vector of scalar values, typically expressed in predicates but possibly supported by many providers in any scalar expression.

For scalar parameters of prepared commands, there is a presumption that different parameter values do not require different plans. In other words, a single preparation and its resulting plan are satisfactory for all possible values of scalar parameters.

Parameter values are set when a command is executed. Methods are included here to offer a means for setting and obtaining a list of parameters and their types.

Method	Description
GetParameterInfo	Gets a list of the command's parameters, their names, and their types.
MapParameterNames	Returns an array of parameter ordinals when given named parameters.
SetParameterInfo	Specifies the native data type of each parameter.

This topic is a part of:

• Microsoft OLE DB