From 1a0809ad2b621a45403d8b461967d1a920e7698f Mon Sep 17 00:00:00 2001
From: Dariusz Stempniak <dariusz.stempniak@snowflake.com>
Date: Thu, 30 Nov 2023 18:35:24 +0100
Subject: [PATCH] SNOW-979340 added description how to enable Arrow (#822)

### Description
Added description how to enable Arrow

### Checklist
- [x] Code compiles correctly
- [x] Code is formatted according to [Coding Conventions](../CodingConventions.md)
- [x] Created tests which fail without the change (if possible)
- [x] All tests passing (`dotnet test`)
- [x] Extended the README / documentation, if necessary
- [x] Provide JIRA issue id (if possible) or GitHub issue id in PR name
---
 README.md | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/README.md b/README.md
index 13f2ca41d..4594bf8dd 100644
--- a/README.md
+++ b/README.md
@@ -448,6 +448,30 @@ The .NET driver supports the following mappings from .NET to Snowflake data type
 | `byte` | `BINARY` |
 | `datetime` | `DATE` |
 
+Arrow data format
+-----------------
+
+The .NET connector, starting with v2.1.3, supports the [Arrow data format](https://arrow.apache.org/) 
+as a [preview](https://docs.snowflake.com/en/release-notes/preview-features) feature for data transfers
+between Snowflake and a .NET client. The Arrow data format avoids extra
+conversions between binary and textual representations of the data. The Arrow
+data format can improve performance and reduce memory consumption in clients.
+
+The data format is controlled by the
+DOTNET_QUERY_RESULT_FORMAT parameter. To use Arrow format, execute:
+
+```snowflake
+-- at the session level
+ALTER SESSION SET DOTNET_QUERY_RESULT_FORMAT = ARROW;
+-- or at the user level
+ALTER USER SET DOTNET_QUERY_RESULT_FORMAT = ARROW;
+-- or at the account level
+ALTER ACCOUNT SET DOTNET_QUERY_RESULT_FORMAT = ARROW;
+```
+The valid values for the parameter are:
+
+- ARROW
+- JSON (default)
 
 Run a Query and Read Data
 -------------------------