if stmt.TableExpr != nil {
				stmt.TableExpr.Build(stmt)
			} else {
				write(v.Raw, stmt.Table)
			}
		} else {
			write(v.Raw, v.Name)
		}

		if v.Alias != "" {
			writer.WriteByte(' ')
			write(v.Raw, v.Alias)
		}
	case clause.Column:
		if v.Table != "" {
			if v.Table == clause.CurrentTable {
				write(v.Raw, stmt.Table)
			} else {
				write(v.Raw, v.Table)
			}

		BOOL    `gorm:"column:fbool"`
		STRING  `gorm:"column:fstring"`
		TIME    `gorm:"column:ftime"`
		BYTES   `gorm:"column:fbytes"`
	}
)

func TestTypeAliasField(t *testing.T) {
	alias, err := schema.Parse(&TypeAlias{}, &sync.Map{}, schema.NamingStrategy{})
	if err != nil {
		t.Fatalf("Failed to parse TypeAlias with permission, got error %v", err)
	}

	fields := []*schema.Field{

		Vars:   []interface{}{clause.Column{Table: "table", Name: "col", Alias: "alias"}},
		Result: "`table`.`col` AS `alias`",
	}, {
		SQL:    "?",
		Vars:   []interface{}{clause.Column{Table: "table", Name: "col", Alias: "alias", Raw: true}},
		Result: "table.col AS alias",
	}, {
		SQL:    "?",
		Vars:   []interface{}{clause.Table{Name: "table", Alias: "alias"}},
		Result: "`table` `alias`",
	}, {
		SQL:    "?",

							return clause.Join{
								Type:  joinType,
								Table: clause.Table{Name: relation.FieldSchema.Table, Alias: tableAliasName},
								ON:    clause.Where{Exprs: exprs},
							}
						}

						parentTableName := clause.CurrentTable
						for _, rel := range relations {
							// joins table alias like "Manager, Company, Manager__Company"
							nestedAlias := utils.NestedRelationName(parentTableName, rel.Name)

	if !field.PrimaryKey {
		// check type
		if !strings.HasPrefix(fullDataType, realDataType) {
			// check type aliases
			aliases := m.DB.Migrator().GetTypeAliases(realDataType)
			for _, alias := range aliases {
				if strings.HasPrefix(fullDataType, alias) {
					isSameType = true
					break
				}
			}

			if !isSameType {
				alterColumn = true
			}
		}
	}

	if !isSameType {
		// check size

			want: "/Users/name/go/pkg/mod/gorm.io/",
		},
		{
			file: "/go/work/proj/gorm/utils/utils.go",
			want: "/go/work/proj/gorm/",
		},
		{
			file: "/go/work/proj/gorm_alias/utils/utils.go",
			want: "/go/work/proj/gorm_alias/",
		},
		{
			file: "/go/work/proj/my.gorm.io/gorm@v1.2.3/utils/utils.go",
			want: "/go/work/proj/my.gorm.io/gorm@v1.2.3/",
		},
	}
	for _, c := range cases {
		s := sourceDir(c.file)

			want: `C:/Users/name/go/pkg/mod/gorm.io/`,
		},
		{
			file: `C:/go/work/proj/gorm/utils/utils.go`,
			want: `C:/go/work/proj/gorm/`,
		},
		{
			file: `C:/go/work/proj/gorm_alias/utils/utils.go`,
			want: `C:/go/work/proj/gorm_alias/`,
		},
		{
			file: `C:/go/work/proj/my.gorm.io/gorm@v1.2.3/utils/utils.go`,
			want: `C:/go/work/proj/my.gorm.io/gorm@v1.2.3/`,
		},
	}
	for _, c := range cases {

	PrimaryColumn = Column{Table: CurrentTable, Name: PrimaryKey}
)

// Column quote with name
type Column struct {
	Table string
	Name  string
	Alias string
	Raw   bool
}

// Table quote with name
type Table struct {
	Name  string
	Alias string
	Raw   bool

	ScaleValue         sql.NullInt64
	NullableValue      sql.NullBool
	ScanTypeValue      reflect.Type
	CommentValue       sql.NullString
	DefaultValueValue  sql.NullString
}

// Name returns the name or alias of the column.
func (ct ColumnType) Name() string {
	if ct.NameValue.Valid {
		return ct.NameValue.String
	}
	return ct.SQLColumnType.Name()
}