Unexpected alter table

go.mod

@@ -4,12 +4,17 @@ go 1.16
 
 require (
 	github.com/denisenkom/go-mssqldb v0.12.2 // indirect
+	github.com/go-sql-driver/mysql v1.7.0 // indirect
 	github.com/golang-sql/civil v0.0.0-20220223132316-b832511892a9 // indirect
-	gorm.io/driver/mysql v1.4.1
-	gorm.io/driver/postgres v1.4.4
-	gorm.io/driver/sqlite v1.4.2
+	github.com/jackc/pgtype v1.13.0 // indirect
+	github.com/mattn/go-sqlite3 v1.14.16 // indirect
+	github.com/microsoft/go-mssqldb v0.19.0 // indirect
+	golang.org/x/crypto v0.4.0 // indirect
+	gorm.io/driver/mysql v1.4.4
+	gorm.io/driver/postgres v1.4.5
+	gorm.io/driver/sqlite v1.4.3
 	gorm.io/driver/sqlserver v1.4.1
-	gorm.io/gorm v1.24.0
+	gorm.io/gorm v1.24.2
 )
 
 replace gorm.io/gorm => ./gorm

main_test.go

@@ -1,20 +1,42 @@
 package main
 
 import (
+	"io/ioutil"
+	"os"
+	"strings"
 	"testing"
 )
 
 // GORM_REPO: https://github.com/go-gorm/gorm.git
 // GORM_BRANCH: master
 // TEST_DRIVERS: sqlite, mysql, postgres, sqlserver
 
-func TestGORM(t *testing.T) {
-	user := User{Name: "jinzhu"}
+type MyTable struct {
+	Def string `gorm:"size:512;index:idx_def,unique"`
+	Abc string `gorm:"size:65000000"`
+}
 
-	DB.Create(&user)
+func TestGORM(t *testing.T) {
+	sql := "CREATE TABLE `my_tables` (`def` varchar(512),`abc` longtext,UNIQUE INDEX `idx_def` (`def`))"
+	if err := DB.Exec(sql).Error; err != nil {
+		t.Errorf("Failed, got error: %v", err)
+	}
+	// stdout to pipe
+	rescueStdout := os.Stdout
+	r, w, _ := os.Pipe()
+	os.Stdout = w
 
-	var result User
-	if err := DB.First(&result, user.ID).Error; err != nil {
+	DB.DryRun = true
+	if err := DB.AutoMigrate(&MyTable{}); err != nil {
 		t.Errorf("Failed, got error: %v", err)
 	}
+
+	// get stdout from pipe
+	w.Close()
+	out, _ := ioutil.ReadAll(r)
+	os.Stdout = rescueStdout
+
+	if strings.Contains(string(out), "ALTER TABLE") {
+		t.Errorf("Unexpected alter table: %v", string(out))
+	}
 }