Revert "remove no differences from the cli output"

This reverts commit 447c4e4.

Author: themisvaltinos

docs/guides/tablediff.md

@@ -135,8 +135,8 @@ sqlmesh table_diff prod:dev --select-model "sqlmesh_example.*"
 
 When diffing multiple models, SQLMesh will:
 
-1. Show the models returned by the selector that exist in both environments and have differences
-2. Compare the models and display the data diff of each model
+1. Show the models returned by the selector that exist in both environments, but have no differences
+2. Compare the models that have differences and display the data diff of each model
 
 > Note: Models will only be data diffed if there's a breaking change that impacts them.
 

sqlmesh/core/console.py

@@ -250,9 +250,10 @@ def stop_table_diff_progress(self, success: bool) -> None:
     @abc.abstractmethod
     def show_table_diff_details(
         self,
+        models_no_diff: t.List[str],
         models_to_diff: t.List[str],
     ) -> None:
-        """Display information about which tables are going to be diffed"""
+        """Display information about which tables are identical and which are diffed"""
 
     @abc.abstractmethod
     def show_table_diff_summary(self, table_diff: TableDiff) -> None:
@@ -716,6 +717,7 @@ def stop_table_diff_progress(self, success: bool) -> None:
 
     def show_table_diff_details(
         self,
+        models_no_diff: t.List[str],
         models_to_diff: t.List[str],
     ) -> None:
         pass
@@ -1981,9 +1983,16 @@ def loading_stop(self, id: uuid.UUID) -> None:
 
     def show_table_diff_details(
         self,
+        models_no_diff: t.List[str],
         models_to_diff: t.List[str],
     ) -> None:
-        """Display information about which tables are going to be diffed"""
+        """Display information about which tables are identical and which are diffed"""
+
+        if models_no_diff:
+            m_tree = Tree("\n[b]Models without changes:")
+            for m in models_no_diff:
+                m_tree.add(f"[{self.TABLE_DIFF_SOURCE_BLUE}]{m}[/{self.TABLE_DIFF_SOURCE_BLUE}]")
+            self._print(m_tree)
 
         if models_to_diff:
             m_tree = Tree("\n[b]Models to compare:")

sqlmesh/core/context.py

@@ -1625,6 +1625,7 @@ def table_diff(
             models_to_diff: t.List[
                 t.Tuple[Model, EngineAdapter, str, str, t.Optional[t.List[str] | exp.Condition]]
             ] = []
+            models_no_diff: t.List[str] = []
             models_without_grain: t.List[Model] = []
             source_snapshots_to_name = {
                 snapshot.name: snapshot for snapshot in source_env.snapshots
@@ -1656,12 +1657,15 @@ def table_diff(
                         models_to_diff.append((model, adapter, source, target, model_on))
                         if not model_on:
                             models_without_grain.append(model)
+                    else:
+                        models_no_diff.append(model_fqn)
 
-            if models_to_diff:
-                self.console.show_table_diff_details(
-                    [model[0].name for model in models_to_diff],
-                )
+            self.console.show_table_diff_details(
+                models_no_diff,
+                [model[0].name for model in models_to_diff],
+            )
 
+            if models_to_diff:
                 if models_without_grain:
                     model_names = "\n".join(
                         f"─ {model.name} \n  at '{model._path}'" for model in models_without_grain