added firebird support

added firebird sql adapter to allow record insert and key retrieving

Dapper.Contrib/SqlMapperExtensions.cs

@@ -49,6 +49,7 @@ public interface ITableNameMapper
                 {"npgsqlconnection", new PostgresAdapter()},
                 {"sqliteconnection", new SQLiteAdapter()},
                 {"mysqlconnection", new MySqlAdapter()},
+                {"fbconnection", new FbAdapter() }
             };
 
         private static List<PropertyInfo> ComputedPropertiesCache(Type type)
@@ -864,3 +865,35 @@ public void AppendColumnNameEqualsValue(StringBuilder sb, string columnName)
         sb.AppendFormat("\"{0}\" = @{1}", columnName, columnName);
     }
 }
+
+public partial class FbAdapter : ISqlAdapter
+{
+    public int Insert(IDbConnection connection, IDbTransaction transaction, int? commandTimeout, string tableName, string columnList, string parameterList, IEnumerable<PropertyInfo> keyProperties, object entityToInsert)
+    {
+        var cmd = $"insert into {tableName} ({columnList}) values ({parameterList})";
+        connection.Execute(cmd, entityToInsert, transaction, commandTimeout);
+
+        var propertyInfos = keyProperties as PropertyInfo[] ?? keyProperties.ToArray();
+        var keyName = propertyInfos.First().Name;
+        var r = connection.Query($"SELECT FIRST 1 {keyName} ID FROM {tableName} ORDER BY {keyName} DESC", transaction: transaction, commandTimeout: commandTimeout);
+
+        var id = r.First().ID;
+        if (id == null) return 0;
+        if (!propertyInfos.Any()) return Convert.ToInt32(id);
+
+        var idp = propertyInfos.First();
+        idp.SetValue(entityToInsert, Convert.ChangeType(id, idp.PropertyType), null);
+
+        return Convert.ToInt32(id);
+    }
+
+    public void AppendColumnName(StringBuilder sb, string columnName)
+    {
+        sb.AppendFormat("{0}", columnName);
+    }
+
+    public void AppendColumnNameEqualsValue(StringBuilder sb, string columnName)
+    {
+        sb.AppendFormat("{0} = @{1}", columnName, columnName);
+    }
+}
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