fixing linting issues

client/conn.go

@@ -121,8 +121,8 @@ func ConnectWithDialer(ctx context.Context, network, addr, user, password, dbNam
 	c.charset = DEFAULT_CHARSET
 
 	// Apply configuration functions.
-	for i := range options {
-		if err := options[i](c); err != nil {
+	for _, option := range options {
+		if err := option(c); err != nil {
 			return nil, err
 		}
 	}

driver/driver_options_test.go

@@ -31,16 +31,20 @@ type mockHandler struct {
 
 func TestDriverOptions_SetCollation(t *testing.T) {
 	c := &client.Conn{}
-	CollationOption(c, "latin2_bin")
+	err := CollationOption(c, "latin2_bin")
+	require.NoError(t, err)
 	require.Equal(t, "latin2_bin", c.GetCollation())
 }
 
 func TestDriverOptions_SetCompression(t *testing.T) {
+	var err error
 	c := &client.Conn{}
-	CompressOption(c, "true")
+	err = CompressOption(c, "true")
+	require.NoError(t, err)
 	require.True(t, c.HasCapability(mysql.CLIENT_COMPRESS))
 
-	CompressOption(c, "false")
+	err = CompressOption(c, "false")
+	require.NoError(t, err)
 	require.False(t, c.HasCapability(mysql.CLIENT_COMPRESS))
 
 	require.Error(t, CompressOption(c, "foo"))
@@ -200,7 +204,6 @@ func (h *mockHandler) HandleStmtPrepare(query string) (params int, columns int,
 }
 
 func (h *mockHandler) HandleStmtExecute(context interface{}, query string, args []interface{}) (*mysql.Result, error) {
-
 	if strings.HasPrefix(strings.ToLower(query), "select") {
 		return h.HandleQuery(query)
 	}

mysql/error.go

@@ -61,6 +61,6 @@ func NewError(errCode uint16, message string) *MyError {
 func ErrorCode(errMsg string) (code int) {
 	var tmpStr string
 	// golang scanf doesn't support %*,so I used a temporary variable
-	fmt.Sscanf(errMsg, "%s%d", &tmpStr, &code)
+	_, _ = fmt.Sscanf(errMsg, "%s%d", &tmpStr, &code)
 	return
 }