🐛 修复自动迁移已存在的表字段报 ORA-22859 错误的问题

添加类型别名：

- `blob`: `longraw`
- `clob`: `longvarchar`

Fixed #26

Signed-off-by: liutianqi <zixizixi@vip.qq.com>

migrator.go

@@ -87,8 +87,10 @@ func (m Migrator) CurrentDatabase() (name string) {
 // GetTypeAliases return database type aliases
 func (m Migrator) GetTypeAliases(databaseTypeName string) (types []string) {
 	switch databaseTypeName {
-	case "clob", "ocicloblocator":
-		types = append(types, "clob", "ocicloblocator")
+	case "blob", "longraw":
+		types = append(types, "blob", "longraw")
+	case "clob", "longvarchar", "ocicloblocator":
+		types = append(types, "clob", "longvarchar", "ocicloblocator")
 	case "nchar", "varchar", "varchar2":
 		types = append(types, "nchar", "varchar", "varchar2")
 	case "number", "integer", "smallint":

migrator_test.go

@@ -5,6 +5,8 @@ import (
 	"reflect"
 	"testing"
 	"time"
+
+	"gorm.io/gorm"
 )
 
 func TestMigrator_AutoMigrate(t *testing.T) {
@@ -165,3 +167,57 @@ type TestTableUserMigrateColumn struct {
 func (TestTableUserMigrateColumn) TableName() string {
 	return "test_user"
 }
+
+type testTableColumnTypeModel struct {
+	ID   int64  `gorm:"column:id;size:64;not null;autoIncrement:true;autoIncrementIncrement:1;primaryKey"`
+	Name string `gorm:"column:name;size:50"`
+	Age  uint8  `gorm:"column:age;size:8"`
+
+	Avatar []byte `gorm:"column:avatar;"` // type:varbinary(8000)
+
+	Balance float64 `gorm:"column:balance;type:decimal(18, 2)"`
+	Remark  string  `gorm:"column:remark;size:-1"`
+	Enabled bool    `gorm:"column:enabled;"`
+
+	CreatedAt time.Time
+	UpdatedAt time.Time
+	DeletedAt gorm.DeletedAt
+}
+
+func (t testTableColumnTypeModel) TableName() string {
+	return "test_table_column_type"
+}
+
+func TestMigrator_TableColumnType(t *testing.T) {
+	db, err := dbNamingCase, dbErrors[0]
+	if err != nil {
+		t.Fatal(err)
+	}
+	if db == nil {
+		t.Log("db is nil!")
+		return
+	}
+	testModel := new(testTableColumnTypeModel)
+
+	type args struct {
+		model interface{}
+		drop  bool
+	}
+	tests := []struct {
+		name string
+		args args
+	}{
+		{name: "create", args: args{model: testModel}},
+		{name: "alter", args: args{model: testModel, drop: true}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if err = db.AutoMigrate(tt.args.model); err != nil {
+				t.Errorf("AutoMigrate failed：%v", err)
+			}
+			if tt.args.drop {
+				_ = db.Migrator().DropTable(tt.args.model)
+			}
+		})
+	}
+}