OrientDB-NET - Command()

This method prepares or executes a command on the OrientDB database. The return value is an OCommandResult object.

Sending Commands

There are several methods available in issuing queries and commands to OrientDB through your C# application. This method allows you to issue SQL commands to the database.

For information on available commands, see SQL Commands and Console Commands commands.

Syntax

// EXECUTING COMMANDS
OCommandResult Command(     string <query>)

• <query> Defines an SQL statement to execute.
• <command> Defines a prepared command object.

Example

For instance, consider the use case of making internal data persistent across multiple operations. When your application is running, it operates a dictionary object. When it closes, it uploads data from the dictionary to OrientDB, so that it will have it ready when you run the app again.

using Orient.Client;
using System;

// SAVE DATA
public void Save(ODatabase database, Dictionary<string, string> data)
{
   // LOG OPERATION
   Console.WriteLine("Saving Data to OrientDB");

   // LOOP OVER DATA
   foreach(KeyValuePair<string, string> entry in data)
   {
      // LOG OPERATION
      Console.WriteLine(" - Saving: {0}", entry.Key);

      // BUILD QUERY
      string sqlQuery = String.Format("UPDATE Save SET {0} = {1}",
         entry.Key, entry.Value);

      // RUN COMMAND
      database.Command(sqlQuery);
   }
}

Here, the application loops over the dictionary, running an UPDATE statement for each variable in the data dictionary.