[Xapian-discuss] Is there any good way to delete many documents in Xapian Indexed data?

[Hightman(马明练)]

Sometimes, I should delete a lot of documents from xapian indexed data, 

I had to call the  WritableDatabase::delete_document() by a fake unique_term, becuase this term
refer to many documents rather than only one document.

But this operator will take for a long time even failed. So, I am finding a better way to solved this
problem, can you help me?