Updated roadmap , updated structure of files

Author: MPCoreDeveloper

SharpCoreDB/TestPageBasedSelect.csx …DB.Tests/Scripts/TestPageBasedSelect.csxSharpCoreDB/TestPageBasedSelect.csx renamed to SharpCoreDB.Tests/Scripts/TestPageBasedSelect.csx SharpCoreDB/TestPageBasedSelect.csx renamed to SharpCoreDB.Tests/Scripts/TestPageBasedSelect.csx

@@ -1,3 +1,9 @@
+// ? RELOCATED: Moved from SharpCoreDB (main project) to SharpCoreDB.Tests/Scripts/
+// Original: SharpCoreDB/TestPageBasedSelect.csx
+// New: SharpCoreDB.Tests/Scripts/TestPageBasedSelect.csx
+// Date: December 2025
+// Reason: Test scripts belong in test project, not production code
+
 // Quick test to verify PageBased SELECT works
 using SharpCoreDB.Core;
 using SharpCoreDB.DataStructures;
@@ -26,7 +32,7 @@ try
     // Test 1: SELECT * (full table scan)
     Console.WriteLine("\nTest 1: SELECT * FROM Users");
     var allRows = db.ExecuteQuery("SELECT * FROM Users");
-    Console.WriteLine($"  ✓ Found {allRows.Count} rows");
+    Console.WriteLine($"  ? Found {allRows.Count} rows");
     foreach (var row in allRows)
     {
         Console.WriteLine($"    - Id={row["Id"]}, Name={row["Name"]}, Age={row["Age"]}");
@@ -35,7 +41,7 @@ try
     // Test 2: SELECT with WHERE (primary key lookup)
     Console.WriteLine("\nTest 2: SELECT * FROM Users WHERE Id = 3");
     var pkRow = db.ExecuteQuery("SELECT * FROM Users WHERE Id = 3");
-    Console.WriteLine($"  ✓ Found {pkRow.Count} rows");
+    Console.WriteLine($"  ? Found {pkRow.Count} rows");
     if (pkRow.Count > 0)
     {
         Console.WriteLine($"    - Id={pkRow[0]["Id"]}, Name={pkRow[0]["Name"]}, Age={pkRow[0]["Age"]}");
@@ -44,7 +50,7 @@ try
     // Test 3: SELECT with WHERE (full scan with filter)
     Console.WriteLine("\nTest 3: SELECT * FROM Users WHERE Age > 30");
     var filteredRows = db.ExecuteQuery("SELECT * FROM Users WHERE Age > 30");
-    Console.WriteLine($"  ✓ Found {filteredRows.Count} rows");
+    Console.WriteLine($"  ? Found {filteredRows.Count} rows");
     foreach (var row in filteredRows)
     {
         Console.WriteLine($"    - Id={row["Id"]}, Name={row["Name"]}, Age={row["Age"]}");
@@ -54,15 +60,15 @@ try
     Console.WriteLine("\nTest 4: UPDATE Users SET Age = 31 WHERE Id = 2");
     db.Execute("UPDATE Users SET Age = 31 WHERE Id = 2");
     var updated = db.ExecuteQuery("SELECT * FROM Users WHERE Id = 2");
-    Console.WriteLine($"  ✓ Updated age: {updated[0]["Age"]}");
+    Console.WriteLine($"  ? Updated age: {updated[0]["Age"]}");
 
     // Test 5: DELETE
     Console.WriteLine("\nTest 5: DELETE FROM Users WHERE Id = 5");
     db.Execute("DELETE FROM Users WHERE Id = 5");
     var remaining = db.ExecuteQuery("SELECT * FROM Users");
-    Console.WriteLine($"  ✓ Remaining rows: {remaining.Count}");
+    Console.WriteLine($"  ? Remaining rows: {remaining.Count}");
 
-    Console.WriteLine("\n✅ All tests passed!");
+    Console.WriteLine("\n? All tests passed!");
 }
 finally
 {

SharpCoreDB/DataStructures/Table.BatchUpdate.cs

@@ -581,29 +581,6 @@ private static string FormatValue(object? value)
         };
     }
 
-    /// <summary>
-    /// 🔥 NEW: Executes typed UpdateBatch for a single PRIMARY KEY update.
-    /// This is the fast path that achieves 5-7x speedup.
-    /// </summary>
-    private static bool ExecuteTypedUpdate<TId, TValue>(
-        Table table,
-        string idColumn,
-        string updateColumn,
-        List<(TId id, TValue value)> updates)
-        where TId : notnull
-        where TValue : notnull
-    {
-        try
-        {
-            table.UpdateBatch(idColumn, updateColumn, updates);
-            return true;
-        }
-        catch
-        {
-            return false;
-        }
-    }
-
     /// <summary>
     /// 🔥 NEW: Batch update with multiple columns using strongly-typed ID and dynamic values.
     /// Optimized for PRIMARY KEY lookups with multiple column updates.
@@ -643,10 +620,10 @@ public int UpdateBatchMultiColumn<TId>(
                 .Distinct()
                 .ToList();
 
-            foreach (var col in allUpdateColumns)
+            var missingColumns = allUpdateColumns.Where(col => !Columns.Contains(col)).ToList();
+            if (missingColumns.Count > 0)
             {
-                if (!Columns.Contains(col))
-                    throw new ArgumentException($"Column '{col}' not found");
+                throw new ArgumentException($"Column(s) '{string.Join(", ", missingColumns)}' not found");
             }
 
             var engine = GetOrCreateStorageEngine();

SharpCoreDB/Ulid.cs SharpCoreDB/DataStructures/Ulid.csSharpCoreDB/Ulid.cs renamed to SharpCoreDB/DataStructures/Ulid.cs

@@ -2,20 +2,31 @@
 // Copyright (c) 2025-2026 MPCoreDeveloper and GitHub Copilot. All rights reserved.
 // Licensed under the MIT License. See LICENSE file in the project root for full license information.
 // </copyright>
+
+// ✅ RELOCATED: Moved from root to DataStructures/
+// Original: SharpCoreDB/Ulid.cs
+// New: SharpCoreDB/DataStructures/Ulid.cs
+// Date: December 2025
+// Reason: Data structure belongs with other data structures (TableInfo, ColumnInfo, etc.)
+
 namespace SharpCoreDB;
 
 using SharpCoreDB.Base32Encoding;
 using System.Security.Cryptography;
 
 /// <summary>
 /// Represents a Universally Unique Lexicographically Sortable Identifier (ULID).
+/// Modern C# 14 record type with Span-based operations.
+/// 
+/// Location: DataStructures/Ulid.cs
+/// Purpose: Time-sortable unique identifier generation and parsing
+/// Features: Record type, Span&lt;T&gt; for zero-allocation, cryptographic randomness
 /// </summary>
 /// <param name="Value">The string value of the ULID.</param>
 public record Ulid(string Value)
 {
     /// <summary>
-    /// Initializes a new instance of the <see cref="Ulid"/> class.
-    /// Initializes a new instance of Ulid with an empty value.
+    /// Initializes a new instance of the <see cref="Ulid"/> class with an empty value.
     /// </summary>
     public Ulid()
         : this(string.Empty)
@@ -53,6 +64,7 @@ public static Ulid NewUlid(DateTime timestamp)
 
     /// <summary>
     /// Creates a new ULID with the specified timestamp in milliseconds since Unix epoch.
+    /// Uses Span&lt;T&gt; for zero-allocation generation.
     /// </summary>
     /// <param name="timestamp">The timestamp in milliseconds.</param>
     /// <returns>A new Ulid instance.</returns>
@@ -93,7 +105,6 @@ public static DateTime GetTimestampFromUlid(Ulid ulid)
         }
 
         ReadOnlySpan<byte> bytes = Base32.Decode(ulid.Value[..10]);
-
         long timestamp = ExtractTimestamp(bytes);
 
         return DateTime.UnixEpoch.AddMilliseconds(timestamp);
@@ -116,11 +127,10 @@ public long ToEpoch()
     {
         if (string.IsNullOrEmpty(this.Value) || this.Value.Length != 26)
         {
-            return 0; // if the value is empty or not 26 characters long, return 0
+            return 0;
         }
 
         ReadOnlySpan<byte> bytes = Base32.Decode(this.Value[..10]);
-
         return ExtractTimestamp(bytes);
     }
 
@@ -133,6 +143,9 @@ public long ToUnixTime()
         return this.ToEpoch();
     }
 
+    /// <summary>
+    /// Extracts timestamp from byte span.
+    /// </summary>
     private static long ExtractTimestamp(ReadOnlySpan<byte> bytes)
     {
         long timestamp = 0;