From fe60c6e466a20274303bada28e2f1b83020fc605 Mon Sep 17 00:00:00 2001
From: Marc Gravell <marc.gravell@gmail.com>
Date: Fri, 13 Oct 2023 06:06:03 +0100
Subject: [PATCH] the $ support added for DuckDB does not need to exacerbate
 the OLEDB problem

---
 Dapper/SqlMapper.cs | 2 +-
 docs/index.md       | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/Dapper/SqlMapper.cs b/Dapper/SqlMapper.cs
index f1e761b23..797b833d2 100644
--- a/Dapper/SqlMapper.cs
+++ b/Dapper/SqlMapper.cs
@@ -2387,7 +2387,7 @@ private static IEnumerable<PropertyInfo> FilterParameters(IEnumerable<PropertyIn
         }
 
         // look for ? / @ / : *by itself*
-        private static readonly Regex smellsLikeOleDb = new(@"(?<![\p{L}\p{N}@_])[?@:$](?![\p{L}\p{N}@_])", RegexOptions.IgnoreCase | RegexOptions.Multiline | RegexOptions.CultureInvariant | RegexOptions.Compiled),
+        private static readonly Regex smellsLikeOleDb = new(@"(?<![\p{L}\p{N}@_])[?@:](?![\p{L}\p{N}@_])", RegexOptions.IgnoreCase | RegexOptions.Multiline | RegexOptions.CultureInvariant | RegexOptions.Compiled),
             literalTokens = new(@"(?<![\p{L}\p{N}_])\{=([\p{L}\p{N}_]+)\}", RegexOptions.IgnoreCase | RegexOptions.Multiline | RegexOptions.CultureInvariant | RegexOptions.Compiled),
             pseudoPositional = new(@"\?([\p{L}_][\p{L}\p{N}_]*)\?", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant | RegexOptions.Compiled);
 
diff --git a/docs/index.md b/docs/index.md
index 36e69bcd1..992753923 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -26,6 +26,7 @@ Note: to get the latest pre-release build, add ` -Pre` to the end of the command
 
 - infer command text without any whitespace as stored-procedure (#1975 via @mgravell)
 - add global `SupportLegacyParameterTokens` setting to enable or disable single-character parameter tokens (#1974 via @Giorgi)
+- revert `$` addition for legacy parameter tokens (#1979 via @mgravell)
 
 ### 2.1.4