Support for fb_info_creation_timestamp_tz (#936)

Author: cincuranet

Provider/src/FirebirdSql.Data.FirebirdClient.Tests/FbDatabaseInfoTests.cs

@@ -51,6 +51,7 @@ public void CompleteDatabaseInfoTest()
 						nameof(FbDatabaseInfo.GetReplicaModeAsync),
 						nameof(FbDatabaseInfo.GetDbFileIdAsync),
 						nameof(FbDatabaseInfo.GetDbGuidAsync),
+						nameof(FbDatabaseInfo.GetCreationTimestampAsync),
 					}.Contains(m.Name))
 					continue;
 

Provider/src/FirebirdSql.Data.FirebirdClient/Common/IscHelper.cs

@@ -166,6 +166,17 @@ public static List<object> ParseDatabaseInfo(byte[] buffer)
 						}
 						break;
 
+					case IscCodes.fb_info_creation_timestamp_tz:
+						{
+							var date = TypeDecoder.DecodeDate((int)VaxInteger(buffer, pos, 4));
+							var time = TypeDecoder.DecodeTime((int)VaxInteger(buffer, pos + 4, 4));
+							var tzId = (ushort)VaxInteger(buffer, pos + 4 + 4, 4);
+							var dt = date.Add(time);
+							dt = DateTime.SpecifyKind(dt, DateTimeKind.Utc);
+							info.Add(TypeHelper.CreateZonedDateTime(dt, tzId, null));
+						}
+						break;
+
 					default:
 						throw new ArgumentOutOfRangeException(nameof(type), $"{nameof(type)}={type}");
 				}

Provider/src/FirebirdSql.Data.FirebirdClient/FirebirdClient/FbDatabaseInfo.cs

@@ -22,6 +22,7 @@
 using System.Threading;
 using System.Threading.Tasks;
 using FirebirdSql.Data.Common;
+using FirebirdSql.Data.Types;
 
 namespace FirebirdSql.Data.FirebirdClient
 {
@@ -440,6 +441,15 @@ public Task<Guid> GetDbGuidAsync(CancellationToken cancellationToken = default)
 			return GetValueAsync<Guid>(IscCodes.fb_info_db_guid, cancellationToken);
 		}
 
+		public FbZonedDateTime GeCreationTimestamp()
+		{
+			return GetValue<FbZonedDateTime>(IscCodes.fb_info_creation_timestamp_tz);
+		}
+		public Task<FbZonedDateTime> GetCreationTimestampAsync(CancellationToken cancellationToken = default)
+		{
+			return GetValueAsync<FbZonedDateTime>(IscCodes.fb_info_creation_timestamp_tz, cancellationToken);
+		}
+
 		#endregion
 
 		#region Constructors
@@ -463,7 +473,7 @@ private T GetValue<T>(byte item)
 				IscCodes.isc_info_end
 			};
 			var info = Connection.InnerConnection.Database.GetDatabaseInfo(items);
-			return info.Any() ? (T)Convert.ChangeType(info[0], typeof(T)) : default;
+			return info.Any() ? (T)info[0]: default;
 		}
 		private async Task<T> GetValueAsync<T>(byte item, CancellationToken cancellationToken = default)
 		{
@@ -475,7 +485,7 @@ private async Task<T> GetValueAsync<T>(byte item, CancellationToken cancellation
 				IscCodes.isc_info_end
 			};
 			var info = await Connection.InnerConnection.Database.GetDatabaseInfoAsync(items, cancellationToken).ConfigureAwait(false);
-			return info.Any() ? (T)Convert.ChangeType(info[0], typeof(T)) : default;
+			return info.Any() ? (T)info[0] : default;
 		}
 
 		private List<T> GetList<T>(byte item)