PomeloFoundation · omarbaruzzo · Feb 15, 2026
diff --git a/.gitignore b/.gitignore
@@ -338,3 +338,6 @@ ASALocalRun/
 
 # Local History for Visual Studio
 .localhistory/
+
+#VSCode
+.vscode/
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
@@ -1,16 +1,21 @@
 {
-    "version": "0.1.0",
+    "version": "2.0.0",
     "command": "dotnet",
-    "isShellCommand": true,
     "args": [],
     "tasks": [
         {
-            "taskName": "build",
+            "label": "build",
+            "type": "shell",
+            "command": "dotnet",
             "args": [
+                "build",
                 "${workspaceRoot}/test/EFCore.MySql.IntegrationTests/EFCore.MySql.IntegrationTests.csproj"
             ],
-            "isBuildCommand": true,
-            "problemMatcher": "$msCompile"
+            "problemMatcher": "$msCompile",
+            "group": {
+                "_id": "build",
+                "isDefault": false
+            }
         }
     ]
 }
diff --git a/Directory.Packages.props b/Directory.Packages.props
@@ -5,19 +5,15 @@
     -->
     <EFCoreVersion>[9.0.0,9.0.999]</EFCoreVersion>
   </PropertyGroup>
-
   <ItemGroup Label="Dependencies">
     <PackageVersion Include="Microsoft.EntityFrameworkCore.Design" Version="$(EFCoreVersion)" />
     <PackageVersion Include="Microsoft.EntityFrameworkCore.Relational.Specification.Tests" Version="$(EFCoreVersion)" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.Relational" Version="$(EFCoreVersion)" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.Relational" Version="9.0.0" />
     <PackageVersion Include="Microsoft.EntityFrameworkCore" Version="$(EFCoreVersion)" />
-
-    <PackageVersion Include="MySqlConnector" Version="2.4.0" />
+    <PackageVersion Include="MySqlConnector" Version="2.5.0" />
     <PackageVersion Include="MySqlConnector.DependencyInjection" Version="2.4.0" />
-
-    <PackageVersion Include="NetTopologySuite" Version="2.5.0" />
-    <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
-
+    <PackageVersion Include="NetTopologySuite" Version="2.6.0" />
+    <PackageVersion Include="Newtonsoft.Json" Version="13.0.4" />
     <PackageVersion Include="Castle.Core" Version="5.1.1" />
     <PackageVersion Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="9.0.0" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="9.0.0" />
@@ -28,27 +24,26 @@
     <PackageVersion Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="9.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Configuration.FileExtensions" Version="9.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Configuration.Json" Version="9.0.0" />
-    <PackageVersion Include="Microsoft.Extensions.Configuration" Version="9.0.0" /> <!-- CHECK: used? -->
-    <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="9.0.0" />
+    <PackageVersion Include="Microsoft.Extensions.Configuration" Version="9.0.0" />
+    <!-- CHECK: used? -->
+    <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="10.0.3" />
     <PackageVersion Include="Microsoft.Extensions.DependencyModel" Version="9.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Logging" Version="9.0.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
+    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="10.0.103" />
     <PackageVersion Include="Moq" Version="4.20.72" />
     <PackageVersion Include="System.Collections.Immutable" Version="9.0.0" />
     <PackageVersion Include="System.ComponentModel.TypeConverter" Version="4.3.0" />
     <PackageVersion Include="System.Diagnostics.DiagnosticSource" Version="9.0.0" />
     <PackageVersion Include="GitHubActionsTestLogger" Version="2.4.1" />
     <PackageVersion Include="Xunit.SkippableFact" Version="1.4.13" />
-
     <!-- Keep at the same level that the EF Core projects use. -->
     <PackageVersion Include="xunit.assert" Version="2.9.2" />
     <PackageVersion Include="xunit.core" Version="2.9.2" />
     <PackageVersion Include="xunit.runner.console" Version="2.9.2" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
     <PackageVersion Include="DotNetAnalyzers.DocumentationAnalyzers" Version="1.0.0-beta.59" />
     <PackageVersion Include="StyleCop.Analyzers" Version="1.1.118" PrivateAssets="All" />
-
     <!-- Needed when using EFCore.Design assembly from local EF Core repository. -->
     <PackageVersion Include="Microsoft.CodeAnalysis" Version="4.10.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.10.0" />

diff --git a/global.json b/global.json
@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "9.0.100",
+    "version": "10.0.103",
     "allowPrerelease": false,
     "rollForward": "latestFeature"
   }

diff --git a/src/EFCore.MySql/Query/ExpressionVisitors/Internal/MySqlQuerySqlGenerator.cs b/src/EFCore.MySql/Query/ExpressionVisitors/Internal/MySqlQuerySqlGenerator.cs
@@ -249,6 +249,14 @@ protected override void GenerateLimitOffset(SelectExpression selectExpression)
             }
         }
 
+        // Single-argument aggregates: generate Name(arg) to match historical SQL shape.
+        // EF Core 9.x base now generates Name((arg)); we keep the old format for backward compatibility.
+        private static readonly HashSet<string> SingleArgAggregateFunctions = new(StringComparer.OrdinalIgnoreCase)
+        {
+            "AVG", "MAX", "MIN", "SUM", "COUNT", "BIT_AND", "BIT_OR", "BIT_XOR",
+            "STD", "STDDEV", "STDDEV_POP", "STDDEV_SAMP", "VAR_POP", "VAR_SAMP", "VARIANCE",
+        };
+
         protected override Expression VisitSqlFunction(SqlFunctionExpression sqlFunctionExpression)
         {
             if (sqlFunctionExpression.Name.StartsWith("@@", StringComparison.Ordinal))
@@ -258,6 +266,16 @@ protected override Expression VisitSqlFunction(SqlFunctionExpression sqlFunction
                 return sqlFunctionExpression;
             }
 
+            if (SingleArgAggregateFunctions.Contains(sqlFunctionExpression.Name)
+                && sqlFunctionExpression.Arguments.Count == 1)
+            {
+                Sql.Append(sqlFunctionExpression.Name);
+                Sql.Append("(");
+                Visit(sqlFunctionExpression.Arguments[0]);
+                Sql.Append(")");
+                return sqlFunctionExpression;
+            }
+
             return base.VisitSqlFunction(sqlFunctionExpression);
         }
 

diff --git a/test/EFCore.MySql.FunctionalTests/Query/EscapesMySqlTestBase.cs b/test/EFCore.MySql.FunctionalTests/Query/EscapesMySqlTestBase.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
@@ -84,7 +84,9 @@ public virtual async Task Where_contains_query_escapes(bool async)
         {
             using (var context = CreateContext())
             {
-                var artistNames = new[]
+                // Use List<string> so Contains binds to Enumerable.Contains; array can bind to
+                // MemoryExtensions.Contains(ReadOnlySpan) and break the expression interpreter.
+                var artistNames = new List<string>
                 {
                     @"Back\slasher's",
                     @"John's Chill Box"

diff --git a/test/EFCore.MySql.FunctionalTests/Query/GearsOfWarQueryMySqlTest.cs b/test/EFCore.MySql.FunctionalTests/Query/GearsOfWarQueryMySqlTest.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Linq.Expressions;
 using System.Threading.Tasks;
@@ -26,7 +27,8 @@ public override Task DateTimeOffset_Contains_Less_than_Greater_than(bool async)
             var dto = MySqlTestHelpers.GetExpectedValue(new DateTimeOffset(599898024001234567, new TimeSpan(1, 30, 0)));
             var start = dto.AddDays(-1);
             var end = dto.AddDays(1);
-            var dates = new[] { dto };
+            // Use List to avoid ReadOnlySpan in expression tree (same as EscapesMySqlTestBase).
+            var dates = new List<DateTimeOffset> { dto };
 
             return AssertQuery(
                 async,

diff --git a/test/EFCore.MySql.FunctionalTests/Query/TPCGearsOfWarQueryMySqlTest.cs b/test/EFCore.MySql.FunctionalTests/Query/TPCGearsOfWarQueryMySqlTest.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Linq.Expressions;
 using System.Threading.Tasks;
@@ -9147,7 +9148,8 @@ public override async Task DateTimeOffset_Contains_Less_than_Greater_than(bool a
         var dto = MySqlTestHelpers.GetExpectedValue(new DateTimeOffset(599898024001234567, new TimeSpan(1, 30, 0)));
         var start = dto.AddDays(-1);
         var end = dto.AddDays(1);
-        var dates = new[] { dto };
+        // Use List to avoid ReadOnlySpan in expression tree (same as GearsOfWarQueryMySqlTest).
+        var dates = new List<DateTimeOffset> { dto };
 
         await AssertQuery(
             async,

diff --git a/test/EFCore.MySql.FunctionalTests/Query/TPTGearsOfWarQueryMySqlTest.cs b/test/EFCore.MySql.FunctionalTests/Query/TPTGearsOfWarQueryMySqlTest.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Linq.Expressions;
 using System.Threading.Tasks;
@@ -28,7 +29,8 @@ public override Task DateTimeOffset_Contains_Less_than_Greater_than(bool async)
             var dto = MySqlTestHelpers.GetExpectedValue(new DateTimeOffset(599898024001234567, new TimeSpan(1, 30, 0)));
             var start = dto.AddDays(-1);
             var end = dto.AddDays(1);
-            var dates = new[] { dto };
+            // Use List to avoid ReadOnlySpan in expression tree (same as GearsOfWarQueryMySqlTest).
+            var dates = new List<DateTimeOffset> { dto };
 
             return AssertQuery(
                 async,

diff --git a/test/EFCore.MySql.FunctionalTests/README.md b/test/EFCore.MySql.FunctionalTests/README.md
@@ -3,6 +3,8 @@ Functional Tests
 
 **Configuring the Database**
 
+The functional tests are intended to be run against **MySQL 8.0+** or an equivalent **MariaDB** version (see the main README for tested versions).
+
 Configure your MySQL database by opening the `config.json.example` file, specifying the connection string and saving the changed file as `config.json`.
 
 **Running Functional Tests**

diff --git a/test/EFCore.MySql.IntegrationTests/README.md b/test/EFCore.MySql.IntegrationTests/README.md
@@ -3,6 +3,8 @@ Integration and Performance Tests
 
 **Configuring the Database**
 
+The integration tests are intended to be run against **MySQL 8.0+** or an equivalent **MariaDB** version (see the main README for tested versions).
+
 1. Configure your MySQL database by opening the `config.json.example` file, specifying the connection string and saving the changed file as `config.json`.
 2. Run the `scripts/rebuild.ps1` PowerShell script on Linux or Windows to rebuild all migrations (for installing PowerShell, see [Install PowerShell on Windows, Linux, and macOS](https://learn.microsoft.com/en-us/powershell/scripting/install/installing-powershell)). Any time you make changes to the database models, run the rebuild script again.