Forcing all DateTimeOffset queries that involve comparisons to be universal time. Closes GH-3590

Author: jeremydmiller

src/LinqTests/Acceptance/against_date_time_offset.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using Marten;
+using Marten.Testing.Documents;
+using Marten.Testing.Harness;
+
+namespace LinqTests.Acceptance;
+
+public class against_date_time_offset : IntegrationContext
+{
+    public against_date_time_offset(DefaultStoreFixture fixture) : base(fixture)
+    {
+    }
+
+    [Fact]
+    public async Task query_against_date_time_offset_that_is_not_universal_time()
+    {
+        await theStore.BulkInsertDocumentsAsync(Target.GenerateRandomData(1000).ToArray());
+
+        var results = await theSession.Query<Target>().Where(x => x.DateOffset < DateTimeOffset.Now.AddDays(-1))
+            .ToListAsync();
+    }
+}

src/Marten/Linq/Members/DateTimeOffsetMember.cs

@@ -1,5 +1,9 @@
 #nullable enable
+using System;
+using System.Linq.Expressions;
 using System.Reflection;
+using Marten.Linq.SqlGeneration.Filters;
+using Weasel.Postgresql.SqlGeneration;
 
 namespace Marten.Linq.Members;
 
@@ -15,4 +19,17 @@ public override string SelectorForDuplication(string pgType)
     {
         return TypedLocator.Replace("d.", "");
     }
+
+    public override ISqlFragment CreateComparison(string op, ConstantExpression constant)
+    {
+        if (constant.Value == null)
+        {
+            return op == "=" ? new IsNullFilter(this) : new IsNotNullFilter(this);
+        }
+
+        var value = (DateTimeOffset)constant.Value;
+
+        var def = new CommandParameter(value.ToUniversalTime());
+        return new MemberComparisonFilter(this, def, op);
+    }
 }