Add support for int64 scans (#2)

Reviewed-on: #2

query.go

@@ -50,6 +50,10 @@ func (q *Query) bindInto(into *int, args ...any) *Query {
 		}
 		v := reflect.ValueOf(arg)
 		if v.Kind() == reflect.Ptr {
+			if v.IsNil() {
+				q.stmt.BindNull(*into)
+				continue
+			}
 			arg = v.Elem().Interface()
 		}
 		if asString, ok := arg.(string); ok {
@@ -213,6 +217,8 @@ func (r *Rows) scanArgument(i int, arg any) error {
 		*asString = r.query.stmt.ColumnText(i)
 	} else if asInt, ok := arg.(*int); ok {
 		*asInt = r.query.stmt.ColumnInt(i)
+	} else if asInt, ok := arg.(*int64); ok {
+		*asInt = r.query.stmt.ColumnInt64(i)
 	} else if asBool, ok := arg.(*bool); ok {
 		*asBool = r.query.stmt.ColumnBool(i)
 	} else if reflect.TypeOf(arg).Kind() == reflect.Ptr && reflect.TypeOf(arg).Elem().Kind() == reflect.Ptr {

query_test.go

@@ -122,6 +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() {
@@ -147,6 +167,15 @@ func TestQueryWithPointerStringArguments(t *testing.T) {
 	require.Equal(t, "bar", *result)
 }
 
+func TestQueryWithInt64Scan(t *testing.T) {
+	db := openTestDb(t)
+	var result int64
+	err := db.Query("select 2").ScanSingle(&result)
+	require.NoError(t, err)
+	require.NotNil(t, result)
+	require.Equal(t, int64(2), result)
+}
+
 func TestQueryWithPointerStringArgumentsCanSetToNull(t *testing.T) {
 	db := openTestDb(t)
 	db.Query("update mytable set value=null where key = 'foo'").MustExec()