table add index:

uid_set
uid_preview

Model/models.py

@@ -628,7 +628,7 @@ class UID_Bucket(models.Model):
 
 class UID_Preview(models.Model):
     id = models.AutoField(primary_key=True, verbose_name=u'自增标记ID')
-    uid = models.CharField(default='', max_length=20, verbose_name='设备UID')
+    uid = models.CharField(default='', max_length=20, db_index=True, verbose_name='设备UID')
     channel = models.SmallIntegerField(verbose_name=u'通道号', default=0)
     addTime = models.IntegerField(verbose_name='添加时间', default=0)
     updTime = models.IntegerField(verbose_name='更新时间', default=0)