func ConvertSliceOfMapToValuesForCreate(stmt *gorm.Statement, mapValues []map[string]interface{}) (values clause.Values) {
	columns := make([]string, 0, len(mapValues))

	// when the length of mapValues is zero,return directly here
	// no need to call stmt.SelectAndOmitColumns method
	if len(mapValues) == 0 {
		stmt.AddError(gorm.ErrEmptySlice)
		return
	}

	var (

			stmt := &gorm.Statement{DB: db, Table: user.Table, Schema: user, Clauses: map[string]clause.Clause{}}
			clause.NamedExpr{SQL: result.SQL, Vars: result.Vars}.Build(stmt)
			if stmt.SQL.String() != result.Result {
				t.Errorf("generated SQL is not equal, expects %v, but got %v", result.Result, stmt.SQL.String())
			}

			if !reflect.DeepEqual(result.ExpectedVars, stmt.Vars) {

	var (
		tx                      = db.getInstance()
		stmt                    = tx.Statement
		modelSchema, joinSchema *schema.Schema
	)

	err := stmt.Parse(model)
	if err != nil {
		return err
	}
	modelSchema = stmt.Schema

	err = stmt.Parse(joinTable)
	if err != nil {
		return err
	}
	joinSchema = stmt.Schema

	relation, ok := modelSchema.Relationships.Relations[field]

		stmt          = gorm.Statement{DB: db, Table: user.Table, Schema: user, Clauses: map[string]clause.Clause{}}
	)

	for _, c := range clauses {
		if _, ok := buildNamesMap[c.Name()]; !ok {
			buildNames = append(buildNames, c.Name())
			buildNamesMap[c.Name()] = true
		}

		stmt.AddClause(c)
	}

	stmt.Build(buildNames...)

// TxCommitter tx committer
type TxCommitter interface {
	Commit() error
	Rollback() error
}

// Tx sql.Tx interface
type Tx interface {
	ConnPool
	TxCommitter
	StmtContext(ctx context.Context, stmt *sql.Stmt) *sql.Stmt
}

// Valuer gorm valuer interface
type Valuer interface {
	GormValue(context.Context, *DB) clause.Expr
}

// GetDBConnector SQL db connector
type GetDBConnector interface {

				}
			}

			if queryFields {
				stmt := gorm.Statement{DB: db}
				// smaller struct
				if err := stmt.Parse(db.Statement.Dest); err == nil && (db.QueryFields || stmt.Schema.ModelType != db.Statement.Schema.ModelType) {
					clauseSelect.Columns = make([]clause.Column, len(stmt.Schema.DBNames))

					for idx, dbName := range stmt.Schema.DBNames {

			Age:   19,
		},
	}
	stmt := &gorm.Statement{
		DB: &gorm.DB{
			Config: &gorm.Config{
				NowFunc: func() time.Time { return time.Time{} },
			},
			Statement: &gorm.Statement{
				Settings: sync.Map{},
				Schema:   s,
			},
		},
		ReflectValue: reflect.ValueOf(dest),
		Dest:         dest,
	}

	stmt.Schema = s

	values := ConvertToCreateValues(stmt)
	expected := clause.Values{

	err = validateTableName(selectAST.From)
	if err != nil {
		return
	}

	// Analyze main select expression
	stmt.selectQProp = selectAST.Expression.analyze(&selectAST)
	err = stmt.selectQProp.err
	if err != nil {
		err = errQueryAnalysisFailure(err)
	}

	// Set table alias
	stmt.tableAlias = selectAST.From.As
	// Remove quotes from column aliases
	if selectAST.Expression != nil {

			wg.Done()
		}()
	}
	wg.Wait()

	conn, ok := tx.ConnPool.(*gorm.PreparedStmtDB)
	AssertEqual(t, ok, true)
	AssertEqual(t, len(conn.Stmts), 2)
	for _, stmt := range conn.Stmts {
		if stmt == nil {
			t.Fatalf("stmt cannot bee nil")
		}
	}

	AssertEqual(t, sqlDB.Stats().InUse, 0)
}

func TestPreparedStmtInTransaction(t *testing.T) {
	user := User{Name: "jinzhu"}

		t.Run(result.name, func(t *testing.T) {
			user, _ := schema.Parse(&tests.User{}, &sync.Map{}, db.NamingStrategy)
			stmt := &gorm.Statement{DB: db, Table: user.Table, Schema: user, Clauses: map[string]clause.Clause{}}
			result.join.Build(stmt)
			if result.sql != stmt.SQL.String() {
				t.Errorf("want: %s, got: %s", result.sql, stmt.SQL.String())
			}
		})
	}