snowflake tests #1687

Dapper/SqlMapper.Settings.cs

@@ -93,6 +93,12 @@ namespace Dapper
             /// operation if there are this many elements or more. Note that this feature requires SQL Server 2016 / compatibility level 130 (or above).
             /// </summary>
             public static int InListStringSplitCount { get; set; } = -1;
+
+            /// <summary>
+            /// If set, pseudo-positional parameters (i.e. ?foo?) are passed using auto-generated incremental names, i.e. "1", "2", "3"
+            /// instead of the original name; for most scenarios, this is ignored since the name is redundant, but "snowflake" requires this.
+            /// </summary>
+            public static bool UseIncrementalPseudoPositionalParameterNames { get; set; }
         }
     }
 }

Dapper/SqlMapper.cs

@@ -1778,6 +1778,8 @@ namespace Dapper
             }
             HashSet<string> consumed = new HashSet<string>(StringComparer.Ordinal);
             bool firstMatch = true;
+            int index = 0; // use this to spoof names; in most pseudo-positional cases, the name is ignored, however:
+                           // for "snowflake", the name needs to be incremental i.e. "1", "2", "3"
             cmd.CommandText = pseudoPositional.Replace(cmd.CommandText, match =>
             {
                 string key = match.Groups[1].Value;
@@ -1793,6 +1795,10 @@ namespace Dapper
                         cmd.Parameters.Clear(); // only clear if we are pretty positive that we've found this pattern successfully
                     }
                     // if found, return the anonymous token "?"
+                    if (Settings.UseIncrementalPseudoPositionalParameterNames)
+                    {
+                        param.ParameterName = (++index).ToString();
+                    }
                     cmd.Parameters.Add(param);
                     parameters.Remove(key);
                     consumed.Add(key);

tests/Dapper.Tests/Dapper.Tests.csproj

@@ -20,10 +20,9 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.0" />
     <PackageReference Include="MySqlConnector" Version="1.1.0" />
     <PackageReference Include="Npgsql" Version="5.0.0" />
+    <PackageReference Include="Snowflake.Data" Version="2.0.3" />
     <PackageReference Include="System.Data.SqlClient" Version="4.8.2" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
-
-
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net462' OR '$(TargetFramework)' == 'net472'">