GH-3530: The Sybase SqlAnywhere driver does not implement DbDataReader.GetChar and incorrectly uses Convert without specifying an IFormatProvider. Wrap the Sybase SqlAnywhere DbDataReader in a SqlAnywhereDbDataReader to correct these issues.

Author: David Ellingsworth

src/NHibernate/Async/Driver/SybaseSQLAnywhereDriver.cs

@@ -0,0 +1,29 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by AsyncGenerator.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+
+using System.Data.Common;
+using NHibernate.AdoNet;
+
+namespace NHibernate.Driver
+{
+	using System.Threading.Tasks;
+	using System.Threading;
+	public partial class SybaseSQLAnywhereDriver : ReflectionBasedDriver
+	{
+
+		public override async Task<DbDataReader> ExecuteReaderAsync(DbCommand command, CancellationToken cancellationToken)
+		{
+			cancellationToken.ThrowIfCancellationRequested();
+			var reader = await (command.ExecuteReaderAsync(cancellationToken)).ConfigureAwait(false);
+
+			return new SqlAnywhereDbDataReader(reader);
+		}
+	}
+}

src/NHibernate/Driver/SybaseSQLAnywhereDriver.cs

@@ -1,9 +1,12 @@
-namespace NHibernate.Driver
+using System.Data.Common;
+using NHibernate.AdoNet;
+
+namespace NHibernate.Driver
 {
 	/// <summary>
 	/// The SybaseSQLAnywhereDriver Driver provides a database driver for Sybase SQL Anywhere 10 and above
 	/// </summary>
-	public class SybaseSQLAnywhereDriver : ReflectionBasedDriver
+	public partial class SybaseSQLAnywhereDriver : ReflectionBasedDriver
 	{
 		/// <summary>
 		/// Initializes a new instance of the <see cref="SybaseSQLAnywhereDriver"/> class.
@@ -32,5 +35,12 @@ public override string NamedPrefix
 		}
 
 		public override bool RequiresTimeSpanForTime => true;
+
+		public override DbDataReader ExecuteReader(DbCommand command)
+		{
+			var reader = command.ExecuteReader();
+
+			return new SqlAnywhereDbDataReader(reader);
+		}
 	}
-}
+}