package gorm

import (
	"context"
	"database/sql"
	"database/sql/driver"
	"errors"
	"reflect"
	"sync"
)

type Stmt struct {
	*sql.Stmt
	Transaction bool
	prepared    chan struct{}
	prepareErr  error
}

type PreparedStmtDB struct {
	Stmts       map[string]*Stmt
	PreparedSQL []string
	Mux         *sync.RWMutex
	ConnPool
}

func NewPreparedStmtDB(connPool ConnPool) *PreparedStmtDB {

package tests_test

import (
	"context"
	"database/sql"
	"database/sql/driver"
	"encoding/json"
	"errors"
	"fmt"
	"reflect"
	"regexp"
	"strconv"
	"testing"
	"time"

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

func TestScannerValuer(t *testing.T) {
	DB.Migrator().DropTable(&ScannerValuerStruct{})
	if err := DB.Migrator().AutoMigrate(&ScannerValuerStruct{}); err != nil {

package gorm

import (
	"context"
	"database/sql"

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

// Dialector GORM database dialector
type Dialector interface {
	Name() string
	Initialize(*DB) error
	Migrator(db *DB) Migrator
	DataTypeOf(*schema.Field) string
	DefaultValueOf(*schema.Field) clause.Expression
	BindVarTo(writer clause.Writer, stmt *Statement, v interface{})
	QuoteTo(clause.Writer, string)

package gorm

import (
	"database/sql"
	"database/sql/driver"
	"encoding/json"
	"reflect"

	"github.com/jinzhu/now"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"
)

type DeletedAt sql.NullTime

// Scan implements the Scanner interface.
func (n *DeletedAt) Scan(value interface{}) error {
	return (*sql.NullTime)(n).Scan(value)
}

// Value implements the driver Valuer interface.

		t.Fatalf("Should find saved record")
	}
}

func TestTransactionOnClosedConn(t *testing.T) {
	DB, err := OpenTestConnection(&gorm.Config{})
	if err != nil {
		t.Fatalf("failed to connect database, got error %v", err)
	}
	rawDB, _ := DB.DB()
	rawDB.Close()

	if err := DB.Transaction(func(tx *gorm.DB) error {
		return nil
	}); err == nil {

	type City struct {
		gorm.Model
		Name string `gorm:"unique"`
	}

	db, err := OpenTestConnection(&gorm.Config{TranslateError: true})
	if err != nil {
		t.Fatalf("failed to connect database, got error %v", err)
	}

	dialectors := map[string]bool{"sqlite": true, "postgres": true, "mysql": true, "sqlserver": true}
	if supported, found := dialectors[db.Dialector.Name()]; !(found && supported) {
		return
	}

			m.CurrentTable(stmt), clause.Column{Name: oldName}, clause.Column{Name: newName},
		).Error
	})
}

// CurrentDatabase returns current database name
func (m Migrator) CurrentDatabase() (name string) {
	m.DB.Raw("SELECT DATABASE()").Row().Scan(&name)
	return
}

// ReorderModels reorder models according to constraint dependencies

package migrator

import "database/sql"

// Index implements gorm.Index interface
type Index struct {
	TableName       string
	NameValue       string
	ColumnList      []string
	PrimaryKeyValue sql.NullBool
	UniqueValue     sql.NullBool
	OptionValue     string
}

// Table return the table name of the index.
func (idx Index) Table() string {
	return idx.TableName
}

// Name return the name of the index.

package clause

import (
	"database/sql"
	"database/sql/driver"
	"go/ast"
	"reflect"
)

// Expression expression interface
type Expression interface {
	Build(builder Builder)
}

// NegationExpressionBuilder negation expression builder
type NegationExpressionBuilder interface {
	NegationBuild(builder Builder)
}

// Expr raw expression
type Expr struct {
	SQL                string
	Vars               []interface{}

package schema_test

import (
	"database/sql"
	"time"

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

type User struct {
	*gorm.Model
	Name      *string
	Age       *uint
	Birthday  *time.Time
	Account   *tests.Account
	Pets      []*tests.Pet
	Toys      []*tests.Toy `gorm:"polymorphic:Owner"`
	CompanyID *int
	Company   *tests.Company
	ManagerID *uint
	Manager   *User