Merge branch 'main' into feature/dont-load-all-tables

# Conflicts:
#	src/PhenX.EntityFrameworkCore.BulkInsert/Metadata/MetadataProvider.cs

Author: fabien.menager

src/PhenX.EntityFrameworkCore.BulkInsert.MySql/MySqlBulkInsertProvider.cs

@@ -19,7 +19,7 @@ internal class MySqlBulkInsertProvider(ILogger<MySqlBulkInsertProvider> logger)
     protected override string AddTableCopyBulkInsertId => $"ALTER TABLE {{0}} ADD {BulkInsertId} INT AUTO_INCREMENT PRIMARY KEY;";
 
     /// <inheritdoc />
-    protected override string GetTempTableName(string tableName) => $"#_temp_bulk_insert_{tableName}";
+    protected override string GetTempTableName(string tableName) => $"#_temp_bulk_insert_{tableName}_{Helpers.RandomString(6)}";
 
     /// <inheritdoc />
     protected override MySqlBulkInsertOptions CreateDefaultOptions() => new()

src/PhenX.EntityFrameworkCore.BulkInsert.Oracle/OracleBulkInsertProvider.cs

@@ -21,10 +21,10 @@ internal class OracleBulkInsertProvider(ILogger<OracleBulkInsertProvider>? logge
 
     /// <inheritdoc />
     /// <summary>
-    /// The temporary table name is generated with a GUID to ensure uniqueness, but limited to less than 30 characters,
-    /// because Oracle prior 12.2 has a limit of 30 characters for identifiers.
+    /// The temporary table name is generated with a random 8-character suffix to ensure uniqueness, and is limited to less than 30 characters,
+    /// because Oracle prior to 12.2 has a limit of 30 characters for identifiers.
     /// </summary>
-    protected override string GetTempTableName(string tableName) => $"#temp_bulk_insert_{Guid.NewGuid().ToString("N")[..8]}";
+    protected override string GetTempTableName(string tableName) => $"#temp_bulk_insert_{Helpers.RandomString(8)}";
 
     protected override OracleBulkInsertOptions CreateDefaultOptions() => new()
     {

src/PhenX.EntityFrameworkCore.BulkInsert.SqlServer/SqlServerBulkInsertProvider.cs

@@ -17,7 +17,7 @@ internal class SqlServerBulkInsertProvider(ILogger<SqlServerBulkInsertProvider>?
     protected override string AddTableCopyBulkInsertId => $"ALTER TABLE {{0}} ADD {BulkInsertId} INT IDENTITY PRIMARY KEY;";
 
     /// <inheritdoc />
-    protected override string GetTempTableName(string tableName) => $"#_temp_bulk_insert_{tableName}";
+    protected override string GetTempTableName(string tableName) => $"#_temp_bulk_insert_{tableName}_{Helpers.RandomString(6)}";
 
     protected override SqlServerBulkInsertOptions CreateDefaultOptions() => new()
     {

src/PhenX.EntityFrameworkCore.BulkInsert.Sqlite/SqliteBulkInsertProvider.cs

@@ -24,7 +24,7 @@ internal class SqliteBulkInsertProvider(ILogger<SqliteBulkInsertProvider>? logge
     protected override string AddTableCopyBulkInsertId => "--"; // No need to add an ID column in SQLite
 
     /// <inheritdoc />
-    protected override string GetTempTableName(string tableName) => $"_temp_bulk_insert_{Guid.NewGuid():N}";
+    protected override string GetTempTableName(string tableName) => $"_temp_bulk_insert_{Helpers.RandomString(6)}";
 
     /// <inheritdoc />
     protected override BulkInsertOptions CreateDefaultOptions() => new()

src/PhenX.EntityFrameworkCore.BulkInsert/BulkInsertProviderBase.cs

@@ -19,7 +19,7 @@ internal abstract class BulkInsertProviderBase<TDialect, TOptions>(ILogger? logg
 
     protected abstract string AddTableCopyBulkInsertId { get; }
 
-    protected virtual string GetTempTableName(string tableName) => $"_temp_bulk_insert_{tableName}";
+    protected virtual string GetTempTableName(string tableName) => $"_temp_bulk_insert_{tableName}_{Helpers.RandomString(6)}";
 
     protected override async IAsyncEnumerable<T> BulkInsertReturnEntities<T>(
         bool sync,
@@ -124,6 +124,7 @@ protected override async Task BulkInsert<T>(
             await connection.Close(sync, ctk);
         }
     }
+
     private async Task<string> PerformBulkInsertAsync<T>(
         bool sync,
         DbContext context,

src/PhenX.EntityFrameworkCore.BulkInsert/Helpers.cs

@@ -27,4 +27,21 @@ public static StringBuilder AppendColumns(this StringBuilder sb, IReadOnlyList<C
     {
         return sb.AppendJoin(", ", columns.Select(c => c.QuotedColumName));
     }
+
+    /// <summary>
+    /// Generates a random alphanumeric string of the specified length.
+    /// </summary>
+    public static string RandomString(int length)
+    {
+        const string chars = "abcdefghijklmnopqrstuvwxyz0123456789";
+
+        var sb = new StringBuilder(length);
+
+        for (var i = 0; i < length; i++)
+        {
+            sb.Append(chars[Random.Shared.Next(chars.Length)]);
+        }
+
+        return sb.ToString();
+    }
 }

src/PhenX.EntityFrameworkCore.BulkInsert/Metadata/MetadataProvider.cs

@@ -34,6 +34,13 @@ public TableMetadata GetTableInfo<T>(DbContext context)
                 throw new InvalidOperationException($"The type '{modelType.FullName}' is not part of the model for the current context.");
             }
 
+
+            // Filter out entities without an associated table
+            // See also https://learn.microsoft.com/en-us/ef/core/modeling/keyless-entity-types
+            if (entityType.GetTableName() is null)
+            {
+            }
+
             var provider = context.GetService<IBulkInsertProvider>();
 
             var tableMetadata = new TableMetadata(entityType, provider.SqlDialect);