Try to automatically set the database provider.

framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/AbpDbContext.cs

@@ -92,6 +92,8 @@ namespace Volo.Abp.EntityFrameworkCore
         {
             base.OnModelCreating(modelBuilder);
 
+            TrySetDatabaseProvider(modelBuilder);
+
             foreach (var entityType in modelBuilder.Model.GetEntityTypes())
             {
                 ConfigureBasePropertiesMethodInfo
@@ -108,6 +110,40 @@ namespace Volo.Abp.EntityFrameworkCore
             }
         }
 
+        protected virtual void TrySetDatabaseProvider(ModelBuilder modelBuilder)
+        {
+            var provider = GetDatabaseProviderOrNull(modelBuilder);
+            if (provider != null)
+            {
+                modelBuilder.SetDatabaseProvider(provider.Value);
+            }
+        }
+        
+        protected virtual EfCoreDatabaseProvider? GetDatabaseProviderOrNull(ModelBuilder modelBuilder)
+        {
+            switch (Database.ProviderName)
+            {
+                case "Microsoft.EntityFrameworkCore.SqlServer":
+                    return EfCoreDatabaseProvider.SqlServer;
+                case "Npgsql.EntityFrameworkCore.PostgreSQL":
+                    return EfCoreDatabaseProvider.PostgreSql;
+                case "Pomelo.EntityFrameworkCore.MySql":
+                    return EfCoreDatabaseProvider.MySql;
+                case "Devart.Data.Oracle.EFCore":
+                    return EfCoreDatabaseProvider.Oracle;
+                case "Microsoft.EntityFrameworkCore.Sqlite":
+                    return EfCoreDatabaseProvider.Sqlite;
+                case "Microsoft.EntityFrameworkCore.InMemory":
+                    return EfCoreDatabaseProvider.InMemory;
+                case "FirebirdSql.EntityFrameworkCore.Firebird":
+                    return EfCoreDatabaseProvider.Firebird;
+                case "Microsoft.EntityFrameworkCore.Cosmos":
+                    return EfCoreDatabaseProvider.Cosmos;
+                default:
+                    return null;
+            }
+        }
+
         public override async Task<int> SaveChangesAsync(bool acceptAllChangesOnSuccess, CancellationToken cancellationToken = default)
         {
             try