AdoDotNetConnectionSupport.DeriveSchema Method
Definition
Important
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Derives the schema returned from a specified command, indicating the layout of items and blocks in a given data reader.
public:
virtual Microsoft::VisualStudio::Data::DataReader ^ DeriveSchema(System::String ^ command, int commandType, cli::array <Microsoft::VisualStudio::Data::DataParameter ^> ^ parameters, int commandTimeout);public virtual Microsoft.VisualStudio.Data.DataReader DeriveSchema (string command, int commandType, Microsoft.VisualStudio.Data.DataParameter[] parameters, int commandTimeout);abstract member DeriveSchema : string * int * Microsoft.VisualStudio.Data.DataParameter[] * int -> Microsoft.VisualStudio.Data.DataReader
override this.DeriveSchema : string * int * Microsoft.VisualStudio.Data.DataParameter[] * int -> Microsoft.VisualStudio.Data.DataReaderPublic Overridable Function DeriveSchema (command As String, commandType As Integer, parameters As DataParameter(), commandTimeout As Integer) As DataReaderParameters
- command
- String
Data-source-specific command for which to derive the schema
- commandType
- Int32
Type of the indicated command, specifying how to interpret the contents of the command parameter.
- parameters
- DataParameter[]
Array of AdoDotNetParameter objects for the specified command type.
- commandTimeout
- Int32
Length of time, in seconds, to block the client before canceling the schema derivation and returning to the caller. A value of zero indicates infinite timeout; value of -1 indicates a provider default.
Returns
Returns a DataReader object instance representing the command schema.