From 322e5a422b59729130ad32812c5282c06815f36b Mon Sep 17 00:00:00 2001
From: Tom <maple.kawamura@gmail.com>
Date: Tue, 17 Oct 2023 17:48:30 +0900
Subject: [PATCH] Add arguments as second sort key for functions.

---
 schema/schema.go      |  5 ++++-
 schema/schema_test.go | 15 +++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/schema/schema.go b/schema/schema.go
index 2b9f6f0d..6097e76d 100644
--- a/schema/schema.go
+++ b/schema/schema.go
@@ -290,7 +290,10 @@ func (s *Schema) Sort() error {
 		return s.Relations[i].Table.Name < s.Relations[j].Table.Name
 	})
 	sort.SliceStable(s.Functions, func(i, j int) bool {
-		return s.Functions[i].Name < s.Functions[j].Name
+		if s.Functions[i].Name != s.Functions[j].Name {
+			return s.Functions[i].Name < s.Functions[j].Name
+		}
+		return s.Functions[i].Arguments < s.Functions[j].Arguments
 	})
 	sort.SliceStable(s.Viewpoints, func(i, j int) bool {
 		return s.Viewpoints[i].Name < s.Viewpoints[j].Name
diff --git a/schema/schema_test.go b/schema/schema_test.go
index ab4c0fde..6678e6df 100644
--- a/schema/schema_test.go
+++ b/schema/schema_test.go
@@ -210,6 +210,16 @@ func TestSchema_Sort(t *testing.T) {
 				},
 			},
 		},
+		Functions: []*Function{
+			&Function{
+				Name:   "b",
+				Arguments: "arg b",
+			},
+			&Function{
+				Name:   "b",
+				Arguments: "arg a",
+			},
+		},
 	}
 	if err := schema.Sort(); err != nil {
 		t.Error(err)
@@ -224,6 +234,11 @@ func TestSchema_Sort(t *testing.T) {
 	if got2 != want2 {
 		t.Errorf("got %v\nwant %v", got2, want2)
 	}
+	want3 := "arg a"
+	got3 := schema.Functions[0].Arguments
+	if got3 != want3 {
+		t.Errorf("got %v\nwant %v", got3, want3)
+	}
 }
 
 func TestRepair(t *testing.T) {