Notes about individual methods and properties

The following table provides notes about individual methods and properties of HiRDB.NET Data Provider.

Table 16-2 Notes about individual methods and properties

Object	Method or property	Details
HiRDBCommand	CommandTimeout property	The setting is ignored because the timeout value during execution depends on the settings in the client environment definition (PDCWAITTIME, PDSWAITTIME, PDSWATCHTIME).
	Cancel method	System.NotSupportedException is returned because there is no cancellation function.
	ExecuteReader method	When the CommandBehavior.KeyInfo, CommandBehavior.SchemaOnly, or CommandBehavior.SequentialAccess argument is specified, it is treated as CommandBehavior.Default because a function for acquiring only column or primary key information is not available.
	UpdatedRowSource property	When UpdatedRowSource.Both or UpdatedRowSource.FirstReturnedRecord is specified, HiRDBException is returned because there is no batch query function that returns rows.
HiRDBCommandBuilder	CatalogLocation property	No function is affected by this property value because a cataloging function is not available.
	CatalogSeparator property	No function is affected by this property value because a cataloging function is not available.
	SetAllValues property	This property value is always true and the UPDATE statement includes all column information.
HiRDBConnection	ConnectionTimeout property	The following value is always returned: When the supported ADO.NET version is 1.1: 15 When the supported ADO.NET version is 2.0: 0
	Database property	The null character always results because there is no function for acquiring database names.
	State property	ConnectionState.Connecting, ConnectionState.Executing, ConnectionState.Fetching, or ConnectionState.Broken will never result because this property is a reserved value for future product versions.
	BeginTransaction method	IsolationLevel is ignored, if specified, because this method is set for each SQL statement or acquired from HiRDB environment variables. No more than one transaction can be executed using a single connection.
	ChangeDatabase method	System.NotSupportedException is returned because a function for changing the connected database is not available.
	EnlistTransaction method	System.NotSupportedException is returned because a distributed transaction function is not available.
	GetSchema method	Schema information is not returned. An empty DataTable object is always returned.
HiRDBDataReader	Depth property	Always 0 because there is no hierarchy concept.
	VisibleFieldCount property	The value is the same as for FieldCount because a column specified in the retrieval SQL statement is always acquired.
	GetBoolean method	NotSupportedException is returned because there is no corresponding type.
	GetByte method	NotSupportedException is returned because there is no corresponding type.
	GetChar method	NotSupportedException is returned because there is no corresponding type.
	GetData method	NotSupportedException is returned because there is no corresponding type.
	GetGuid method	NotSupportedException is returned because there is no corresponding type.
	GetProviderSpecificFieldType	An object with the data type provided in .NET Framework's common language runtime is returned because no unique data types are supported.
	GetProviderSpecificValue	An object with the data type provided in .NET Framework's common language runtime is returned because no unique data types are supported.
	GetProviderSpecificValues	An object with the data type provided in .NET Framework's common language runtime is returned because no unique data types are supported.
	NextResult method	false is returned because there is no multiple record set function.
HiRDBParameter	DbType property	If DbType.Boolean, DbType.Currency, DbType.Guid, or DbType.VarNumeric is specified, HiRDBException is returned because there is no corresponding type.
	Direction property	If HiRDBCommand class's ExecuteNonQuery, ExecuteReader, ExecuteScalar, or Prepare method is executed while Direction.ReturnValue is specified, HiRDBException is returned because there is no function for acquiring the stored procedure's return value.
	IsNullable property	Acquisition only; setting is not available. (The null value can always be specified.)
HiRDBProviderFactory	CreateDataSourceEnumerator method	NotSupportedException is returned because no HiRDB enumeration type is provided.
HiRDBTransaction	IsolationLevel property	The following value is always returned: When the supported ADO.NET version is 1.1: IsolationLevel.ReadCommitted When the supported ADO.NET version is 2.0: IsolationLevel.RepeatableRead

16.6.2 Notes about individual methods and properties