/// <summary>
        /// Insert a new database record from the supplied data transfer object.
        /// </summary>
        /// <param name="transaction">
        /// The current <see cref="NpgsqlTransaction"/> to the database.
        /// </param>
        /// <param name="partition">
        /// The database partition (schema) where the requested resource will be stored.
        /// </param>
        /// <param name="elementBase">
        /// The elementBase DTO that is to be persisted.
        /// </param>
        /// <param name="container">
        /// The container of the DTO to be persisted.
        /// </param>
        /// <returns>
        /// True if the concept was successfully persisted.
        /// </returns>
        public virtual bool Write(NpgsqlTransaction transaction, string partition, CDP4Common.DTO.ElementBase elementBase, CDP4Common.DTO.Thing container = null)
        {
            bool isHandled;
            var  valueTypeDictionaryAdditions = new Dictionary <string, string>();
            var  beforeWrite = this.BeforeWrite(transaction, partition, elementBase, container, out isHandled, valueTypeDictionaryAdditions);

            if (!isHandled)
            {
                beforeWrite = beforeWrite && base.Write(transaction, partition, elementBase, container);

                using (var command = new NpgsqlCommand())
                {
                    var sqlBuilder = new System.Text.StringBuilder();

                    sqlBuilder.AppendFormat("INSERT INTO \"{0}\".\"ElementBase\"", partition);
                    sqlBuilder.AppendFormat(" (\"Iid\", \"Owner\")");
                    sqlBuilder.AppendFormat(" VALUES (:iid, :owner);");

                    command.Parameters.Add("iid", NpgsqlDbType.Uuid).Value   = elementBase.Iid;
                    command.Parameters.Add("owner", NpgsqlDbType.Uuid).Value = !this.IsDerived(elementBase, "Owner") ? elementBase.Owner : Utils.NullableValue(null);

                    command.CommandText = sqlBuilder.ToString();
                    command.Connection  = transaction.Connection;
                    command.Transaction = transaction;

                    this.ExecuteAndLogCommand(command);
                }
                elementBase.Category.ForEach(x => this.AddCategory(transaction, partition, elementBase.Iid, x));
            }

            return(this.AfterWrite(beforeWrite, transaction, partition, elementBase, container));
        }
        /// <summary>
        /// Insert a new database record, or updates one if it already exists from the supplied data transfer object.
        /// This is typically used during the import of existing data to the Database.
        /// </summary>
        /// <param name="transaction">
        /// The current <see cref="NpgsqlTransaction"/> to the database.
        /// </param>
        /// <param name="partition">
        /// The database partition (schema) where the requested resource will be stored.
        /// </param>
        /// <param name="elementBase">
        /// The elementBase DTO that is to be persisted.
        /// </param>
        /// <param name="container">
        /// The container of the DTO to be persisted.
        /// </param>
        /// <returns>
        /// True if the concept was successfully persisted.
        /// </returns>
        public virtual bool Upsert(NpgsqlTransaction transaction, string partition, CDP4Common.DTO.ElementBase elementBase, CDP4Common.DTO.Thing container = null)
        {
            var valueTypeDictionaryAdditions = new Dictionary <string, string>();

            base.Upsert(transaction, partition, elementBase, container);

            using (var command = new NpgsqlCommand())
            {
                var sqlBuilder = new System.Text.StringBuilder();

                sqlBuilder.AppendFormat("INSERT INTO \"{0}\".\"ElementBase\"", partition);
                sqlBuilder.AppendFormat(" (\"Iid\", \"Owner\")");
                sqlBuilder.AppendFormat(" VALUES (:iid, :owner)");

                command.Parameters.Add("iid", NpgsqlDbType.Uuid).Value   = elementBase.Iid;
                command.Parameters.Add("owner", NpgsqlDbType.Uuid).Value = !this.IsDerived(elementBase, "Owner") ? elementBase.Owner : Utils.NullableValue(null);
                sqlBuilder.Append(" ON CONFLICT (\"Iid\")");
                sqlBuilder.Append(" DO UPDATE ");
                sqlBuilder.Append(" SET \"Owner\"");
                sqlBuilder.Append(" = :owner;");

                command.CommandText = sqlBuilder.ToString();
                command.Connection  = transaction.Connection;
                command.Transaction = transaction;

                this.ExecuteAndLogCommand(command);
            }
            elementBase.Category.ForEach(x => this.UpsertCategory(transaction, partition, elementBase.Iid, x));

            return(true);
        }