SNOW-950923 Description of the changes regarding query id in exceptio…

…n for put/get

README.md

@@ -672,6 +672,66 @@ using (IDbConnection conn = new SnowflakeDbConnection())
 }
 ```
 
+PUT local files to stage
+------------------------
+
+PUT command can be used to upload files of a local directory or a single local file to the Snowflake stages (named, internal table stage or internal user stage).
+Such staging files can be used to load data into a table. 
+More on this topic: [File staging with PUT](https://docs.snowflake.com/en/sql-reference/sql/put).
+
+In the driver the command can be executed in a bellow way:
+```cs
+using (IDbConnection conn = new SnowflakeDbConnection())
+{
+    try
+    {
+	    conn.ConnectionString = "<connecting parameter>";
+	    conn.Open();
+	    var cmd = (SnowflakeDbCommand)conn.CreateCommand(); // cast allows get QueryId from the command
+	
+	    cmd.CommandText = $"PUT file://some_data.csv @my_schema.my_stage AUTO_COMPRESS=TRUE";
+	    var reader = cmd.ExecuteReader();
+	    Assert.IsTrue(reader.read()); // on success
+        Assert.DoesNotThrow(() => Guid.Parse(cmd.GetQueryId()));
+    }
+    catch (SnowflakeDbException e)
+    {
+        Assert.DoesNotThrow(() => Guid.Parse(e.QueryId)); // when failed
+        Assert.That(e.InnerException.GetType(), Is.EqualTo(typeof(FileNotFoundException)));
+
+    }
+```
+In case of a failure a SnowflakeDbException will be thrown and will provide QueryId.
+Inner exception (if applicable) will provide some details on the failure cause and
+it will be for example: FileNotFoundException, DirectoryNotFoundException.
+
+GET stage files
+---------------
+GET command allows to download stage directories or files to a local directory.
+It can be used in connection with named stage, table internal stage or user stage. 
+Detailed information on the command: [Downloading files with GET](https://docs.snowflake.com/en/sql-reference/sql/get).
+
+To use the command in a driver similar code can be executed in a client app:
+```cs
+    try
+    {
+	    conn.ConnectionString = "<connecting parameter>";
+	    conn.Open();
+	    var cmd = (SnowflakeDbCommand)conn.CreateCommand(); // cast allows get QueryId from the command
+	
+	    cmd.CommandText = $"GET @my_schema.my_stage/stage_file.csv file://local_file.csv AUTO_COMPRESS=TRUE";
+	    var reader = cmd.ExecuteReader();
+	    Assert.IsTrue(reader.read()); // if succeeded
+        Assert.DoesNotThrow(() => Guid.Parse(cmd.GetQueryId()));
+    }
+    catch (SnowflakeDbException e)
+    {
+        Assert.DoesNotThrow(() => Guid.Parse(e.QueryId)); // on failure
+    }
+```
+In case of a failure a SnowflakeDbException will be thrown or DBDataReader will return a False response.
+In any case QueryId should be available from the exception or command property.
+
 Close the Connection
 --------------------