Feature/disable triggers

Respawn.DatabaseTests/SqlServerTests.cs

@@ -1,4 +1,4 @@
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Xunit;
 using Xunit.Abstractions;
 
@@ -237,7 +237,7 @@ public async Task ShouldHandleCircularRelationships()
             {
                 await checkpoint.Reset(_connection);
             }
-            catch 
+            catch
             {
                 _output.WriteLine(checkpoint.DeleteSql);
                 throw;
@@ -468,8 +468,8 @@ public async Task ShouldReseedIdAccordingToIdentityInitialSeedValue()
         [Fact]
         public async Task ShouldReseedIdAccordingToIdentityInitialSeedValue_TableHasNeverHadAnyData()
         {
-            _database.Execute("create table Foo ([id] [int] IDENTITY(1001,1), Value int)");
-
+            _database.Execute("create table Foo ([id] [int] IDENTITY(1001,1), Value int)");
+
             var checkpoint = new Checkpoint();
             checkpoint.WithReseed = true;
 
@@ -486,5 +486,33 @@ public async Task ShouldReseedIdAccordingToIdentityInitialSeedValue_TableHasNeve
             _database.Insert(new Foo { Value = 0 });
             _database.ExecuteScalar<int>("SELECT MAX(id) FROM Foo").ShouldBe(1001);
         }
+
+        [Fact]
+        public async Task ShouldDisableTriggers()
+        {
+            _database.Execute("create table a (id int primary key)");
+            _database.Execute("create table b (a_id int)");
+            _database.Execute("CREATE TRIGGER a_Insert ON a FOR DELETE AS INSERT INTO b (a_id) SELECT Id FROM Deleted");
+            _database.Execute("insert into a (id) values (1)");
+
+            _database.ExecuteScalar<int>("SELECT COUNT(1) FROM a").ShouldBe(1);
+
+            var checkpoint = new Checkpoint
+            {
+                TablesToIgnore = new[] {"b"}
+            };
+            try
+            {
+                await checkpoint.Reset(_connection);
+            }
+            catch
+            {
+                _output.WriteLine(checkpoint.DeleteSql ?? string.Empty);
+                throw;
+            }
+
+            _database.ExecuteScalar<int>("SELECT COUNT(1) FROM a").ShouldBe(0);
+            _database.ExecuteScalar<int>("SELECT COUNT(1) FROM b").ShouldBe(0);
+        }
     }
 }

Respawn/DbAdapter.cs

@@ -209,7 +209,9 @@ public string BuildDeleteCommandText(GraphBuilder graph)
                 }
                 foreach (var table in graph.ToDelete)
                 {
+                    builder.AppendLine($"ALTER TABLE {table.GetFullName(QuoteCharacter)} DISABLE TRIGGER ALL;");
                     builder.AppendLine($"DELETE {table.GetFullName(QuoteCharacter)};");
+                    builder.AppendLine($"ALTER TABLE {table.GetFullName(QuoteCharacter)} ENABLE TRIGGER ALL;");
                 }
                 foreach (var table in graph.CyclicalTableRelationships.Select(rel => rel.ParentTable))
                 {