/// <summary>
        /// カラム定義を取得する
        /// </summary>
        /// <param name="tableName">カラム定義を取得したいテーブルの名称</param>
        /// <returns></returns>
        public List<ColumnDefinition> GetDefinitions(string tableName)
        {
            List<ColumnDefinition> definitions = new List<ColumnDefinition> { };

            // SQL文を生成する
            StringBuilder query = new StringBuilder();
            query.Append("SELECT c.name AS COLUMN_NAME,tp.name AS COLUMN_TYPE, c.max_length AS COLUMN_MAX_LENGTH, c.max_length AS COLUMN_MAX_LENGTH, c.is_identity AS IS_IDENTITY, c.is_nullable AS IS_NULLABLE");
            query.Append(" FROM sys.tables t, sys.columns c, sys.types tp");
            query.Append(" WHERE t.name = @table_name AND t.object_id = c.object_id AND c.user_type_id = tp.user_type_id");

            // DBと接続
            using (SqlCommand cmd = new SqlCommand(query.ToString(), this.SqlConnection))
            {
                SqlParameter param = cmd.CreateParameter();
                param.ParameterName = "@table_name";
                param.SqlDbType = SqlDbType.Char;
                param.Direction = ParameterDirection.Input;
                param.Value = tableName;
                cmd.Parameters.Add(param);

                // SQL文の実行
                using (SqlDataReader reader = cmd.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        int index = 0;

                        ColumnDefinition definition = new ColumnDefinition();
                        if (!reader.IsDBNull(index))
                        {
                            definition.ColumnName = reader.GetString(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.TypeName = reader.GetString(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.Length = reader.GetInt16(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.IsIdentity = reader.GetInt16(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.IsNullableBool = reader.GetBoolean(index);
                        }
                        index++;

                        if (definition.ColumnName.Length > 0)
                        {
                            definitions.Add(definition);
                        }
                    }
                }
            }

            return definitions;
        }
        /// <summary>
        /// カラム定義を取得する
        /// </summary>
        /// <param name="tableName">カラム定義を取得したいテーブルの名称</param>
        /// <returns></returns>
        private List<ColumnDefinition> _GetDefinitions(string tableName)
        {
            List<ColumnDefinition> definitions = new List<ColumnDefinition> { };

            // SQL文を生成する
            StringBuilder query = new StringBuilder();
            query.Append("EXEC sp_columns @table_name");

            // DBと接続
            using (SqlCommand cmd = new SqlCommand(query.ToString(), this.SqlConnection))
            {
                SqlParameter param = cmd.CreateParameter();
                param.ParameterName = "@table_name";
                param.SqlDbType = SqlDbType.Char;
                param.Direction = ParameterDirection.Input;
                param.Value = tableName;
                cmd.Parameters.Add(param);

                // SQL文の実行
                using (SqlDataReader reader = cmd.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        int index = 0;

                        ColumnDefinition definition = new ColumnDefinition();
                        if (!reader.IsDBNull(index))
                        {
                            definition.TableQualifier = reader.GetString(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.TableOwner = reader.GetString(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.TableName = reader.GetString(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.ColumnName = reader.GetString(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.DataType = reader.GetInt16(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.TypeName = reader.GetString(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.Precision = reader.GetInt32(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.Length = reader.GetInt32(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.Scale = reader.GetInt16(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.Radix = reader.GetInt16(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.Nullable = reader.GetInt16(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.Remarks = reader.GetString(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.ColumnDef = reader.GetString(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.SqlDataType = reader.GetInt16(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.SqlDateTimeSub = reader.GetInt16(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.CharOctetLength = reader.GetInt32(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.OriginalPosition = reader.GetInt32(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.IsNullable = reader.GetString(index);
                        }
                        index++;

                        if (!reader.IsDBNull(index))
                        {
                            definition.SsDataType = reader.GetByte(index);
                        }
                        index++;

                        if (definition.TableName.Length > 0)
                        {
                            definitions.Add(definition);
                        }
                    }
                }
            }

            return definitions;
        }