jacky wrote:
hi, 1. Is there an effect method to check if there exists the same
field(hold a unique ID) when added into lucene index database? Make a
search for this field?
One way is to create an IndexReader and IndexSearcher on your index,
which you reopen every now and then. But we do this task by using a
separate database, for the sake of efficiency.
2. Is there an effect method to check if there exists the duplicate
fields(hold a unique ID) in the lucene index database? Two methods:
Read all documents and compare the fields, or search for each field.
Is there a better one?
The simplest way without using an external database is to use the
termDocs enumeration. For each term you can easily see which ones have
multiple documents, so every document other than the first for each term
is a duplicate (which you could then use to build a filter to remove
duplicates.)
Daniel
--
Daniel Noll
Nuix Pty Ltd
Suite 79, 89 Jones St, Ultimo NSW 2007, Australia Ph: +61 2 9280 0699
Web: http://www.nuix.com.au/ Fax: +61 2 9212 6902
This message is intended only for the named recipient. If you are not
the intended recipient you are notified that disclosing, copying,
distributing or taking any action in reliance on the contents of this
message or attachment is strictly prohibited.
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
