test: invalid cache plan with prepare stmt (#5778)

* test: invalid cache plan with prepare stmt

* test: more test cases

* test: drop and rename column

tests/migrate_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"math/rand"
+	"os"
 	"reflect"
 	"strings"
 	"testing"
@@ -12,6 +13,7 @@ import (
 	"gorm.io/driver/postgres"
 
 	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
 	"gorm.io/gorm/schema"
 	. "gorm.io/gorm/utils/tests"
 )
@@ -890,7 +892,7 @@ func findColumnType(dest interface{}, columnName string) (
 	return
 }
 
-func TestInvalidCachedPlan(t *testing.T) {
+func TestInvalidCachedPlanSimpleProtocol(t *testing.T) {
 	if DB.Dialector.Name() != "postgres" {
 		return
 	}
@@ -925,6 +927,101 @@ func TestInvalidCachedPlan(t *testing.T) {
 	}
 }
 
+func TestInvalidCachedPlanPrepareStmt(t *testing.T) {
+	if DB.Dialector.Name() != "postgres" {
+		return
+	}
+
+	db, err := gorm.Open(postgres.Open(postgresDSN), &gorm.Config{PrepareStmt: true})
+	if err != nil {
+		t.Errorf("Open err:%v", err)
+	}
+	if debug := os.Getenv("DEBUG"); debug == "true" {
+		db.Logger = db.Logger.LogMode(logger.Info)
+	} else if debug == "false" {
+		db.Logger = db.Logger.LogMode(logger.Silent)
+	}
+
+	type Object1 struct {
+		ID uint
+	}
+	type Object2 struct {
+		ID     uint
+		Field1 int `gorm:"type:int8"`
+	}
+	type Object3 struct {
+		ID     uint
+		Field1 int `gorm:"type:int4"`
+	}
+	type Object4 struct {
+		ID     uint
+		Field2 int
+	}
+	db.Migrator().DropTable("objects")
+
+	err = db.Table("objects").AutoMigrate(&Object1{})
+	if err != nil {
+		t.Errorf("AutoMigrate err:%v", err)
+	}
+	err = db.Table("objects").Create(&Object1{}).Error
+	if err != nil {
+		t.Errorf("create err:%v", err)
+	}
+
+	// AddColumn
+	err = db.Table("objects").AutoMigrate(&Object2{})
+	if err != nil {
+		t.Errorf("AutoMigrate err:%v", err)
+	}
+
+	err = db.Table("objects").Take(&Object2{}).Error
+	if err != nil {
+		t.Errorf("take err:%v", err)
+	}
+
+	// AlterColumn
+	err = db.Table("objects").AutoMigrate(&Object3{})
+	if err != nil {
+		t.Errorf("AutoMigrate err:%v", err)
+	}
+
+	err = db.Table("objects").Take(&Object3{}).Error
+	if err != nil {
+		t.Errorf("take err:%v", err)
+	}
+
+	// AddColumn
+	err = db.Table("objects").AutoMigrate(&Object4{})
+	if err != nil {
+		t.Errorf("AutoMigrate err:%v", err)
+	}
+
+	err = db.Table("objects").Take(&Object4{}).Error
+	if err != nil {
+		t.Errorf("take err:%v", err)
+	}
+
+	db.Table("objects").Migrator().RenameColumn(&Object4{}, "field2", "field3")
+	if err != nil {
+		t.Errorf("RenameColumn err:%v", err)
+	}
+
+	err = db.Table("objects").Take(&Object4{}).Error
+	if err != nil {
+		t.Errorf("take err:%v", err)
+	}
+
+	db.Table("objects").Migrator().DropColumn(&Object4{}, "field3")
+	if err != nil {
+		t.Errorf("RenameColumn err:%v", err)
+	}
+
+	err = db.Table("objects").Take(&Object4{}).Error
+	if err != nil {
+		t.Errorf("take err:%v", err)
+	}
+}
+
 func TestDifferentTypeWithoutDeclaredLength(t *testing.T) {
 	type DiffType struct {
 		ID   uint