MySql.Data.MySqlClient.SchemaProvider.GetSchemaInternal C# (CSharp) Method

        protected virtual DataTable GetSchemaInternal(string collection, string[] restrictions)
        {
            switch (collection)
            {
                    // common collections
                case "METADATACOLLECTIONS":
                    return GetCollections();
                case "DATASOURCEINFORMATION":
                    return GetDataSourceInformation();
                case "DATATYPES":
                    return GetDataTypes();
                case "RESTRICTIONS":
                    return GetRestrictions();
                case "RESERVEDWORDS":
                    return GetReservedWords();

                    // collections specific to our provider
                case "USERS":
                    return GetUsers(restrictions);
                case "DATABASES":
                    return GetDatabases(restrictions);
                case "UDF":
                    return GetUDF(restrictions);
            }

            // if we have a current database and our users have
            // not specified a database, then default to the currently
            // selected one.
            if (restrictions == null)
                restrictions = new string[2];
            if (connection != null &&
                connection.Database != null &&
                connection.Database.Length > 0 &&
                restrictions.Length > 1 &&
                restrictions[1] == null)
                restrictions[1] = connection.Database;

            switch (collection)
            {
                case "TABLES":
                    return GetTables(restrictions);
                case "COLUMNS":
                    return GetColumns(restrictions);
                case "INDEXES":
                    return GetIndexes(restrictions);
                case "INDEXCOLUMNS":
                    return GetIndexColumns(restrictions);
                case "FOREIGN KEYS":
                    return GetForeignKeys(restrictions);
                case "FOREIGN KEY COLUMNS":
                    return GetForeignKeyColumns(restrictions);
            } 
            return null;
        }