diff --git a/create.go b/create.go
index 7cb6547..b315433 100644
--- a/create.go
+++ b/create.go
@@ -1,7 +1,6 @@
 package oracle
 
 import (
-	"database/sql"
 	"reflect"
 
 	"github.com/sijms/go-ora/v2"
@@ -76,9 +75,14 @@ func Create(db *gorm.DB) {
 					if idx > 0 {
 						_ = stmt.WriteByte(',')
 					}
-					stmt.AddVar(stmt, sql.Out{Dest: reflect.New(field.FieldType).Interface()})
+
+					outVar := go_ora.Out{Dest: reflect.New(field.FieldType).Interface()}
+					if field.Size > 0 {
+						outVar.Size = field.Size
+					}
+					stmt.AddVar(stmt, outVar)
 				}
-				_, _ = stmt.WriteString(" /*-sql.Out{}-*/")
+				_, _ = stmt.WriteString(" /*-go_ora.Out{}-*/")
 			}
 		}
 
@@ -229,7 +233,7 @@ func getDefaultValues(db *gorm.DB, idx int) {
 
 	for _, val := range db.Statement.Vars {
 		switch v := val.(type) {
-		case sql.Out:
+		case go_ora.Out:
 			switch insertTo.Kind() {
 			case reflect.Slice, reflect.Array:
 				for i := insertTo.Len() - 1; i >= 0; i-- {
diff --git a/create_test.go b/create_test.go
index 42d137d..c50e161 100644
--- a/create_test.go
+++ b/create_test.go
@@ -171,3 +171,56 @@ func TestMergeCreateUnique(t *testing.T) {
 		t.Logf("result: %s", dataJsonBytes)
 	})
 }
+
+type testModelOra03146TTC struct {
+	Id          int64     `gorm:"primaryKey;autoIncrement:false;column:SL_ID;type:uint;size:20;default:0;comment:id" json:"SL_ID"`
+	ApiName     string    `gorm:"column:SL_API_NAME;type:VARCHAR2;size:100;default:null;comment:接口名称" json:"SL_API_NAME"`
+	RawReceive  string    `gorm:"column:SL_RAW_RECEIVE_JSON;type:VARCHAR2;size:4000;default:null;comment:原始请求参数" json:"SL_RAW_RECEIVE_JSON"`
+	RawSend     string    `gorm:"column:SL_RAW_SEND_JSON;type:VARCHAR2;size:4000;default:null;comment:原始响应参数" json:"SL_RAW_SEND_JSON"`
+	DealReceive string    `gorm:"column:SL_DEAL_RECEIVE_JSON;type:VARCHAR2;size:4000;default:null;comment:处理请求参数" json:"SL_DEAL_RECEIVE_JSON"`
+	DealSend    string    `gorm:"column:SL_DEAL_SEND_JSON;type:VARCHAR2;size:4000;default:null;comment:处理响应参数" json:"SL_DEAL_SEND_JSON"`
+	Code        string    `gorm:"column:SL_CODE;type:VARCHAR2;size:16;default:null;comment:http状态" json:"SL_CODE"`
+	CreatedTime time.Time `gorm:"column:SL_CREATED_TIME;type:date;default:null;comment:创建时间" json:"SL_CREATED_TIME"`
+}
+
+func TestOra03146TTC(t *testing.T) {
+	db, err := dbNamingCase, dbErrors[0]
+	if err != nil {
+		t.Fatal(err)
+	}
+	if db == nil {
+		t.Log("db is nil!")
+		return
+	}
+
+	model := testModelOra03146TTC{}
+	migrator := db.Set("gorm:table_comments", "TTC 字段的缓冲区长度无效问题测试表").Migrator()
+	if migrator.HasTable(model) {
+		if err = migrator.DropTable(model); err != nil {
+			t.Fatalf("DropTable() error = %v", err)
+		}
+	}
+	if err = migrator.AutoMigrate(model); err != nil {
+		t.Fatalf("AutoMigrate() error = %v", err)
+	} else {
+		t.Log("AutoMigrate() success!")
+	}
+
+	// INSERT INTO "T100_SCPTOAPI_LOG" ("SL_ID","SL_API_NAME","SL_RAW_RECEIVE_JSON","SL_RAW_SEND_JSON","SL_DEAL_RECEIVE_JSON","SL_DEAL_SEND_JSON","SL_CODE","SL_CREATED_TIME")
+	// VALUES (9578529926701056,'/v1/t100/packingNum','11111','11111','11111','11111','111','2024-08-27 18:21:39.495')
+	data := testModelOra03146TTC{
+		Id:          9578529926701056,
+		ApiName:     "/v1/t100/packingNum",
+		RawReceive:  "11111",
+		RawSend:     "11111",
+		DealReceive: "11111",
+		DealSend:    "11111",
+		Code:        "111",
+		CreatedTime: time.Now(),
+	}
+	result := db.Create(&data)
+	if err = result.Error; err != nil {
+		t.Fatalf("执行失败：%v", err)
+	}
+	t.Log("执行成功，影响行数：", result.RowsAffected)
+}