fix : clauseSelect.Columns missed when use Join And execute multiple query.

[ghost]

• [] Do only one thing
• [] Non breaking API changes
• [] Tested

What did this pull request do?

fixed: clauseSelect.Columns missed when use Join And execute multiple query.

PR for #4746

User Case Description

run following code:

func TestJoinCount(t *testing.T) {
	companyA := Company{Name: "A"}
	companyB := Company{Name: "B"}
	DB.Create(&companyA)
	DB.Create(&companyB)

	user := User{Name: "kingGo", CompanyID: &companyB.ID}
	DB.Create(&user)

	query := DB.Model(&User{}).Joins("Company")
	//Bug happens when .Count is called on a query.
	//Removing the below two lines or downgrading to gorm v1.20.12 will make this test pass.
	var total int64
	query.Count(&total)

	var result User

	// Incorrectly generates a 'SELECT *' query which causes companies.id to overwrite users.id
	if err := query.First(&result, user.ID).Error; err != nil {
		t.Fatalf("Failed, got error: %v", err)
	}

	if result.ID != user.ID {
		t.Fatalf("result's id, %d, doesn't match user's id, %d", result.ID, user.ID)
	}
}

run it use gorm v1.21.15 will failed, actual query SQL:

SELECT * FROM `users` LEFT JOIN `companies` `Company`
ON `users`.`company_id` = `Company`.`id`
WHERE `users`.`deleted_at` IS NULL AND `users`.`id` = 1 ORDER BY `users`.`id` LIMIT 1

run it use gorm v1.20.12 will succeed, actual query SQL:

SELECT `users`.`id`,`users`.`created_at`,`users`.`updated_at`,`users`.`deleted_at`,`users`.`name`,`users`.`age`,`users`.`birthday`,`users`.`company_id`,`users`.`manager_id`,`users`.`active`,`Company`.`id` AS `Company__id`,`Company`.`name` AS `Company__name`
FROM `users` LEFT JOIN `companies` `Company`
ON `users`.`company_id` = `Company`.`id`
WHERE `users`.`id` = 1 AND `users`.`deleted_at` IS NULL ORDER BY `users`.`id` LIMIT 1