Calling Stored Procedures
You can invoke a stored procedure using AmazonDynamoDBCommand in the same way as any other SQL stored procedure. To instantiate a AmazonDynamoDBCommand object, provide the name of the stored procedure and a AmazonDynamoDBConnection 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 AmazonDynamoDBCommand instance.
C#
string connectionString = "AWS Access Key=xxx;AWS Secret Key=xxx;Domain=amazonaws.com;AWS Region=OREGON;"; using (AmazonDynamoDBConnection connection = new AmazonDynamoDBConnection(connectionString)) { AmazonDynamoDBCommand cmd = new AmazonDynamoDBCommand("CreateSchema", connection); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add(new AmazonDynamoDBParameter("@TableName", "Task")); // Add other parameters as needed ... AmazonDynamoDBDataReader 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 = "AWS Access Key=xxx;AWS Secret Key=xxx;Domain=amazonaws.com;AWS Region=OREGON;" Using connection As New AmazonDynamoDBConnection(connectionString) Dim cmd As New AmazonDynamoDBCommand("CreateSchema", connection) cmd.CommandType = CommandType.StoredProcedure cmd.Parameters.Add(New AmazonDynamoDBParameter("@TableName", "Task")) ' Add other parameters as needed ... Dim rdr As AmazonDynamoDBDataReader = 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 AmazonDynamoDBCommand instance.
C#
string connectionString = "AWS Access Key=xxx;AWS Secret Key=xxx;Domain=amazonaws.com;AWS Region=OREGON;"; using (AmazonDynamoDBConnection connection = new AmazonDynamoDBConnection(connectionString)) { AmazonDynamoDBCommand cmd = new AmazonDynamoDBCommand("EXECUTE CreateSchema TableName = @TableName;", connection); cmd.Parameters.Add(new AmazonDynamoDBParameter("@TableName", "Task")); // Add other parameters as needed ... AmazonDynamoDBDataReader 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 = "AWS Access Key=xxx;AWS Secret Key=xxx;Domain=amazonaws.com;AWS Region=OREGON;" Using connection As New AmazonDynamoDBConnection(connectionString) Dim cmd As New AmazonDynamoDBCommand("EXECUTE CreateSchema TableName = @TableName;", connection) cmd.Parameters.Add(New AmazonDynamoDBParameter("@TableName", "Task")) ' Add other parameters as needed ... Dim rdr As AmazonDynamoDBDataReader = 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