Fix NamedValueChecker implemented on conn not used

connection.go

@@ -261,7 +261,7 @@ func (c *connection) statement(stmt driver.Stmt, err error, id, query string) (d
 		return stmt, err
 	}
 
-	return &statement{Stmt: stmt, query: query, logger: c.logger, connID: c.id, id: id}, nil
+	return &statement{Stmt: stmt, query: query, logger: c.logger, connID: c.id, conn: c.Conn, id: id}, nil
 }
 
 func (c *connection) rows(res driver.Rows, err error, query string, args []driver.Value) (driver.Rows, error) {

statement.go

@@ -17,6 +17,7 @@ type statement struct {
 	query  string
 	logger *logger
 	id     string
+	conn   driver.Conn
 	connID string
 }
 
@@ -115,7 +116,10 @@ func (s *statement) QueryContext(ctx context.Context, args []driver.NamedValue)
 func (s *statement) CheckNamedValue(nm *driver.NamedValue) error {
 	checker, ok := s.Stmt.(driver.NamedValueChecker)
 	if !ok {
-		return driver.ErrSkip
+		checker, ok = s.conn.(driver.NamedValueChecker)
+		if !ok {
+			return driver.ErrSkip
+		}
 	}
 
 	lvl, start := LevelTrace, time.Now()

statement_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql/driver"
 	"encoding/json"
+	"errors"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -376,6 +377,17 @@ func TestStatement_CheckNamedValue(t *testing.T) {
 		assert.NotEmpty(t, stmtOutput.Data[testOpts.connIDFieldname])
 	})
 
+	t.Run("Implement driver.NamedValueChecker on conn but stmt", func(t *testing.T) {
+		stmtMock := &statementMock{}
+		connMock := &driverConnNamedValueCheckerMock{}
+		mockErr := errors.New("mock")
+		connMock.On("CheckNamedValue", mock.Anything).Return(mockErr)
+
+		stmt := &statement{Stmt: stmtMock, logger: testLogger, id: testLogger.opt.uidGenerator.UniqueID(), connID: testLogger.opt.uidGenerator.UniqueID(), conn: connMock}
+		err := stmt.CheckNamedValue(&driver.NamedValue{Name: "", Ordinal: 0, Value: "testid"})
+		assert.Equal(t, mockErr, err)
+	})
+
 	t.Run("Not implement driver.NamedValueChecker", func(t *testing.T) {
 		stmtMock := &statementMock{}
 
@@ -458,6 +470,14 @@ func (m *statementNamedValueCheckerMock) CheckNamedValue(nm *driver.NamedValue)
 	return m.Called().Error(0)
 }
 
+type driverConnNamedValueCheckerMock struct {
+	driverConnMock
+}
+
+func (c *driverConnNamedValueCheckerMock) CheckNamedValue(nm *driver.NamedValue) error {
+	return c.Called().Error(0)
+}
+
 type statementValueConverterMock struct {
 	statementMock
 }