c.got = append(c.got, query)
	return c.db.QueryRowContext(ctx, query, args...)
}

func TestConnPoolWrapper(t *testing.T) {
	dialect := os.Getenv("GORM_DIALECT")
	if dialect != "mysql" {
		t.SkipNow()
	}

	dbDSN := os.Getenv("GORM_DSN")
	if dbDSN == "" {
		dbDSN = "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local"
	}

type RPCStats struct {
	Errs uint64

	DialAvgDuration uint64
	TTFBAvgDuration uint64
	DialErrs        uint64
}

// GetRPCStats returns RPC stats, include calls errors and dhcp/tcp metrics
func GetRPCStats() RPCStats {
	s := RPCStats{
		Errs:     atomic.LoadUint64(&globalStats.errs),
		DialErrs: atomic.LoadUint64(&globalStats.tcpDialErrs),
	}
	if v := atomic.LoadUint64(&globalStats.tcpDialCount); v > 0 {

		writer.WriteByte(')')
	case clause.Expr:
		v.Build(stmt)
	case string:
		stmt.DB.Dialector.QuoteTo(writer, v)
	case []string:
		writer.WriteByte('(')
		for idx, d := range v {
			if idx > 0 {
				writer.WriteByte(',')
			}
			stmt.DB.Dialector.QuoteTo(writer, d)
		}
		writer.WriteByte(')')
	default:
		stmt.DB.Dialector.QuoteTo(writer, fmt.Sprint(field))
	}
}

// Quote returns quoted value

package tests_test

import (
	"testing"

	. "gorm.io/gorm/utils/tests"
)

func TestExceptionsWithInvalidSql(t *testing.T) {
	if name := DB.Dialector.Name(); name == "sqlserver" {
		t.Skip("skip sqlserver due to it will raise data race for invalid sql")
	}

	var columns []string
	if DB.Where("sdsd.zaaa = ?", "sd;;;aa").Pluck("aaa", &columns).Error == nil {

package tests

import (
	"context"
	"testing"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"
)

// testDialector is a minimal Dialector implementation used only for unit tests in-memory.
type testDialector struct{}

func (d testDialector) Name() string                                   { return "test" }
func (d testDialector) Initialize(*gorm.DB) error                      { return nil }

	connStats := globalConnStats.toServerConnStats()
	rpcStats := rest.GetRPCStats()
	if globalIsDistErasure {
		m.Set(internodeErrorsTotal, float64(rpcStats.Errs))
		m.Set(internodeDialErrorsTotal, float64(rpcStats.DialErrs))
		m.Set(internodeDialAvgTimeNanos, float64(rpcStats.DialAvgDuration))
		m.Set(internodeSentBytesTotal, float64(connStats.internodeOutputBytes))
		m.Set(internodeRecvBytesTotal, float64(connStats.internodeInputBytes))
	}

		t.Fatalf("failed to nested preload")
	}

	if DB.Dialector.Name() == "mysql" {
		// mysql 5.7 doesn't support row_number()
		if strings.HasPrefix(DB.Dialector.(*mysql.Dialector).ServerVersion, "5.7") {
			return
		}
	}
	if DB.Dialector.Name() == "sqlserver" {
		// sqlserver doesn't support order by in subquery
		return
	}

		t.Errorf("Table with escape character, got %v", r.Statement.SQL.String())
	}

	r = dryDB.Create(&UserWithTable{}).Statement
	if DB.Dialector.Name() != "sqlite" {
		if !regexp.MustCompile(`INSERT INTO .gorm.\..user. (.*name.*) VALUES (.*)`).MatchString(r.Statement.SQL.String()) {
			t.Errorf("Table with escape character, got %v", r.Statement.SQL.String())
		}

	EncryptedString        EncryptedString
}

func (*SerializerPostgresStruct) TableName() string { return "serializer_structs" }

func adaptorSerializerModel(s *SerializerStruct) interface{} {
	if DB.Dialector.Name() == "postgres" || DB.Dialector.Name() == "gaussdb" {
		sps := SerializerPostgresStruct(*s)
		return &sps
	}
	return s
}

type Roles []string

type Job struct {
	Title    string
	Number   int
	Location string

	}
}

// only sqlite, postgres, gaussdb, sqlserver support returning
func TestUpdateReturning(t *testing.T) {
	if DB.Dialector.Name() != "sqlite" && DB.Dialector.Name() != "postgres" && DB.Dialector.Name() != "gaussdb" && DB.Dialector.Name() != "sqlserver" {
		return
	}

	users := []*User{
		GetUser("update-returning-1", Config{}),
		GetUser("update-returning-2", Config{}),