RDFSharp.Store.RDFSQLServerStore.PrepareStore C# (CSharp) Метод

        private void PrepareStore()
        {
            var check           = this.Diagnostics();

            //Prepare the database only if diagnostics has detected the missing of "Quadruples" table in the store
            if (check          == RDFStoreEnums.RDFStoreSQLErrors.QuadruplesTableNotFound) {
                try {

                    //Open connection
                    this.Connection.Open();

                    //Create command
                    var command = new SqlCommand("CREATE TABLE [dbo].[Quadruples] ([QuadrupleID] BIGINT PRIMARY KEY NOT NULL, [TripleFlavor] INTEGER NOT NULL, [Context] VARCHAR(1000) NOT NULL, [ContextID] BIGINT NOT NULL, [Subject] VARCHAR(1000) NOT NULL, [SubjectID] BIGINT NOT NULL, [Predicate] VARCHAR(1000) NOT NULL, [PredicateID] BIGINT NOT NULL, [Object] VARCHAR(1000) NOT NULL, [ObjectID] BIGINT NOT NULL); CREATE NONCLUSTERED INDEX [IDX_ContextID] ON [dbo].[Quadruples]([ContextID]);CREATE NONCLUSTERED INDEX [IDX_SubjectID] ON [dbo].[Quadruples]([SubjectID]);CREATE NONCLUSTERED INDEX [IDX_PredicateID] ON [dbo].[Quadruples]([PredicateID]);CREATE NONCLUSTERED INDEX [IDX_ObjectID] ON [dbo].[Quadruples]([ObjectID],[TripleFlavor]);CREATE NONCLUSTERED INDEX [IDX_SubjectID_PredicateID] ON [dbo].[Quadruples]([SubjectID],[PredicateID]);CREATE NONCLUSTERED INDEX [IDX_SubjectID_ObjectID] ON [dbo].[Quadruples]([SubjectID],[ObjectID],[TripleFlavor]);CREATE NONCLUSTERED INDEX [IDX_PredicateID_ObjectID] ON [dbo].[Quadruples]([PredicateID],[ObjectID],[TripleFlavor]);", this.Connection);

                    //Execute command
                    command.ExecuteNonQuery();

                    //Close connection
                    this.Connection.Close();

                }
                catch (Exception ex) {

                    //Close connection
                    this.Connection.Close();

                    //Propagate exception
                    throw new RDFStoreException("Cannot prepare SQL Server store because: " + ex.Message, ex);

                }
            }

            //Otherwise, an exception must be thrown because it has not been possible to connect to the instance/database
            else if (check     == RDFStoreEnums.RDFStoreSQLErrors.InvalidDataSource) {
                throw new RDFStoreException("Cannot prepare SQL Server store because: unable to connect to the server instance or to open the selected database.");
            }
        }