Fix yet another pointer

Reviewed-on: #1

query.go

@@ -44,13 +44,17 @@ func (q *Query) bindInto(into *int, args ...any) *Query {
 	}
 	for i, arg := range args {
 		*into++
+		if arg == nil {
+			q.stmt.BindNull(*into)
+			continue
+		}
 		v := reflect.ValueOf(arg)
 		if v.Kind() == reflect.Ptr {
 			if v.IsNil() {
 				q.stmt.BindNull(*into)
 				continue
 			}
-			arg = v.Elem().Interface() // Dereference the pointer
+			arg = v.Elem().Interface()
 		}
 		if asString, ok := arg.(string); ok {
 			q.stmt.BindText(*into, asString)

query_test.go

@@ -94,9 +94,14 @@ func TestUpdateQuery(t *testing.T) {
 }
 
 func TestUpdateQueryWithWrongArguments(t *testing.T) {
+	type S struct {
+		Field string
+	}
 	db := openTestDb(t)
-	value := "ipsum"
+	abc := S{
-	err := db.Query("insert into mytable(key, value) values ('lorem', ?)").Bind(&value).Exec()
+		Field: "ipsum",
+	}
+	err := db.Query("insert into mytable(key, value) values ('lorem', ?)").Bind(abc).Exec()
 	require.Error(t, err)
 }
 
@@ -117,6 +122,26 @@ func TestUpdateQueryWithPointerValue(t *testing.T) {
 	require.Equal(t, "ipsum", value)
 }
 
+func TestUpdateQueryWithSetPointerValue(t *testing.T) {
+	type S struct {
+		value *string
+	}
+	db := openTestDb(t)
+	func() {
+		tx := db.MustBegin()
+		defer tx.MustRollback()
+		tx.Query("insert into mytable(key, value) values ('lorem', 'bar')").MustExec()
+		s := S{nil}
+		key := "lorem"
+		tx.Query("update mytable set value = ? where key = ?").Bind(s.value, key).MustExec()
+		tx.MustCommit()
+	}()
+
+	var value *string
+	db.Query("select value from mytable where key = 'lorem'").MustScanSingle(&value)
+	require.Equal(t, (*string)(nil), value)
+}
+
 func TestUpdateQueryWithNullValue(t *testing.T) {
 	db := openTestDb(t)
 	func() {
@@ -128,7 +153,7 @@ func TestUpdateQueryWithNullValue(t *testing.T) {
 		tx.MustCommit()
 	}()
 
-	var value string
+	var value *string
 	db.Query("select value from mytable where key = 'lorem'").MustScanSingle(&value)
 	require.Nil(t, value)
 }