Calling Stored Procedures
You can invoke a stored procedure using SingleStoreCommand in the same way as any other SQL stored procedure. To instantiate a SingleStoreCommand object, provide the name of the stored procedure and a SingleStoreConnection instance as arguments to the constructor. Set the value of the CommandType property to "StoredProcedure" and add the parameters as key-value pairs to the Parameters collection of the SingleStoreCommand instance.
C#
string connectionString = "User=myUser;Password=myPassword;Database=NorthWind;Server=myServer;Port=3306;";
using (SingleStoreConnection connection = new SingleStoreConnection(connectionString)) {
SingleStoreCommand cmd = new SingleStoreCommand("SelectEntries", connection);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(new SingleStoreParameter("@ObjectName", "Account"));
// Add other parameters as needed ...
SingleStoreDataReader rdr = cmd.ExecuteReader();
while (rdr.Read()) {
for (int i = 0; i < rdr.FieldCount; i++) {
Console.WriteLine(rdr.GetName(i) + " --> " + rdr[i]);
}
Console.WriteLine();
}
}
VB.NET
Dim connectionString As String = "User=myUser;Password=myPassword;Database=NorthWind;Server=myServer;Port=3306;"
Using connection As New SingleStoreConnection(connectionString)
Dim cmd As New SingleStoreCommand("SelectEntries", connection)
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.Add(New SingleStoreParameter("@ObjectName", "Account"))
' Add other parameters as needed ...
Dim rdr As SingleStoreDataReader = cmd.ExecuteReader()
While rdr.Read()
For i As Integer = 0 To rdr.FieldCount - 1
Console.WriteLine(rdr.GetName(i) + " --> " + rdr(i))
Next
Console.WriteLine()
End While
End Using
Alternatively, you can set the parameters of a stored procedure in the text of the command. The support for stored procedure statements follows the standard form shown below:
"EXECUTE my_proc @first = 1, @second = 2, @third = 3;" "EXEC my_proc @first = 1, @second = 2, @third = 3;"
To execute a parameterized query, add parameters as key-value pairs to the Parameters collection of the SingleStoreCommand instance.
C#
string connectionString = "User=myUser;Password=myPassword;Database=NorthWind;Server=myServer;Port=3306;";
using (SingleStoreConnection connection = new SingleStoreConnection(connectionString)) {
SingleStoreCommand cmd = new SingleStoreCommand("EXECUTE SelectEntries ObjectName = @ObjectName;", connection);
cmd.Parameters.Add(new SingleStoreParameter("@ObjectName", "Account"));
// Add other parameters as needed ...
SingleStoreDataReader rdr = cmd.ExecuteReader();
while (rdr.Read()) {
for (int i = 0; i < rdr.FieldCount; i++) {
Console.WriteLine(rdr.GetName(i) + " --> " + rdr[i]);
}
Console.WriteLine();
}
}
VB.NET
Dim connectionString As String = "User=myUser;Password=myPassword;Database=NorthWind;Server=myServer;Port=3306;"
Using connection As New SingleStoreConnection(connectionString)
Dim cmd As New SingleStoreCommand("EXECUTE SelectEntries ObjectName = @ObjectName;", connection)
cmd.Parameters.Add(New SingleStoreParameter("@ObjectName", "Account"))
' Add other parameters as needed ...
Dim rdr As SingleStoreDataReader = cmd.ExecuteReader()
While rdr.Read()
For i As Integer = 0 To rdr.FieldCount - 1
Console.WriteLine(rdr.GetName(i) + " --> " + rdr(i))
Next
Console.WriteLine()
End While
End Using