isSameType  = fullDataType == realDataType
	)

	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

		refName        = rel.Name + "."
		values         = rValues.Interface()
	)

	for name, ok := range selectColumns {
		columnName := ""
		if strings.HasPrefix(name, refName) {
			columnName = strings.TrimPrefix(name, refName)
		}

		if columnName != "" {
			if ok {
				selects = append(selects, columnName)
			} else {
				omits = append(omits, columnName)

		}()
	} else {
		defer delete(tx.Statement.Clauses, "SELECT")
	}

	if len(tx.Statement.Selects) == 0 {
		tx.Statement.AddClause(clause.Select{Expression: clause.Expr{SQL: "count(*)"}})
	} else if !strings.HasPrefix(strings.TrimSpace(strings.ToLower(tx.Statement.Selects[0])), "count(") {
		expr := clause.Expr{SQL: "count(*)"}

		if len(tx.Statement.Selects) == 1 {
			dbName := tx.Statement.Selects[0]

	for name, ok := range selectColumns {
		columnName := ""
		if strings.HasPrefix(name, association.Relationship.Name) {
			if columnName = strings.TrimPrefix(name, association.Relationship.Name); columnName == ".*" {
				columnName = name
			}
		} else if strings.HasPrefix(name, clause.Associations) {
			columnName = name
		}

		if columnName != "" {
			if ok {