Procedure Parameters

The ProcedureParameters schema collection describes the stored procedure parameters.

Retrieving Stored Procedure Parameter Metadata

The ProcedureParameters schema collection contains information about the parameters of stored procedures.

To retrieve the ProcedureParameters schema collection, call the GetSchema method of the CompositeConnection class. Access the metadata in the DataTable object returned. The following example retrieves parameter information for all stored procedures:

C#

String connectionString = "Host=myHost;Domain=myDomain;DataSource=myDataSource;User=myUser;Password=myPassword";

using (CompositeConnection conn = new CompositeConnection(connectionString)) {

  conn.Open();

  DataTable table = conn.GetSchema("ProcedureParameters");

  foreach (DataRow row in table.Rows) {

    foreach (DataColumn col in table.Columns) {

      Console.WriteLine(col.ColumnName + "=" + row[col]);

    }

  }

}

VB.NET

Dim connectionString As [String] = "User=Host=myHost;Domain=myDomain;DataSource=myDataSource;User=myUser;Password=myPassword"

Using conn As New CompositeConnection(connectionString)

  conn.Open()

  Dim table As DataTable = conn.GetSchema("ProcedureParameters")

  For Each row As DataRow In table.Rows

    For Each col As DataColumn In table.Columns

      Console.WriteLine(col.ColumnName + "=" + row(col))

    Next

  Next

End Using

Columns Returned

The columns of the schema collection are the following:

Column Name	Data Type	Description
SPECIFIC_CATALOG	System.String	The name of the database containing the stored procedure.
SPECIFIC_SCHEMA	System.String	The schema that contains the stored procedure.
SPECIFIC_NAME	System.String	The name of the stored procedure containing the parameter.
PARAMETER_NAME	System.String	The name of the parameter.
PARAMETER_MODE	System.String	Returns IN for an input parameter, OUT for an output parameter, or INOUT for parameters that can be both input and output parameters.
ORDINAL_POSITION	System.Int32	The sequence number of the parameter.
DATA_TYPE	System.String	The data type name.
CHARACTER_MAXIMUM_LENGTH	System.Int32	The maximum length in characters.
CHARACTER_SET_NAME	System.String	The name of the character set for a column with character data.
NUMERIC_PRECISION	System.Int32	The maximum number of digits in numeric data.
NUMERIC_SCALE	System.Int32	The column scale or number of digits to the right of the decimal point.
DATETIME_PRECISION	System.Int32	The precision in fractional seconds if the parameter type is datetime or smalldatetime. Otherwise, returns NULL.
PROCEDURE_DESCRIPTION	System.String	A brief description of the procedure.
PROVIDER_TYPE	System.Type	Indicates the appropriate data type dependent on the language you are executing in.