Hi Anshum, Thanks for answering my question. By this I got to know that I cannot update without deleting my document.
So whenever I am indexing the documents first I need to check whether the particular key exists in the document or not and if it exists I need to delete it and add the updated one? Sounds Cool? On Mon, Jun 6, 2011 at 4:10 PM, Anshum <ansh...@gmail.com> wrote: > Hii Pranav, > By what you've mentioned, it looks like you want to modify a particular > document (or all docs) by adding a particular field in the document(s). As > of right now, its not possible to modify a document inside a lucene index. > That is due to the way the index is structured. The only way as of now to > modify a record is to delete it, create a new doc and then add the new doc. > Also, the lucene's delete document function does not physically free up the > space for the document unless you optimize the index so you may have to do > that periodically, depending upon your update frequency. > Even the updateDocument function as of now would internally delete the > document and add the new supplied document. > Hope this answer helps. > > -- > Anshum Gupta > http://ai-cafe.blogspot.com > > > On Mon, Jun 6, 2011 at 11:59 AM, Pranav goyal <pranavgoyal40...@gmail.com > >wrote: > > > Hi all, > > > > I am a newbie to lucene. > > I have successfully created my lucene index. But I am not getting how to > > invalidate previous indexes whenever I add/delete/update any field in my > > lucene index. > > Please help me out. > > > > for better understanding I have wrote my indexing function : > > > > StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_31); > > IndexWriter writer = null; > > File indexDir = new File("./indexDir"); > > try { > > writer = new > IndexWriter(FSDirectory.open(indexDir), > > analyzer, IndexWriter.MaxFieldLength.UNLIMITED); > > } > > catch (IOException e1) { > > e1.printStackTrace(); > > } > > > > > > //Adding New fields to the document > > Document d = new Document(); > > d.add(new Field("key", key , Field.Store.YES , > > Field.Index.ANALYZED)); > > > > > > // d.add(Field.Text("obj", attribute.toString())); > > // index in Lucene here > > if (attribute instanceof String) { > > System.out.println("IN CMnString "); > > d.add(new Field("attribute",attribute.toString(), > > Field.Store.YES, Field.Index.NO)); > > System.out.println("key is ->"+key+"...Attribute > is > > "+attribute); > > } > > else if (attribute instanceof CMnMoney) { > > System.out.println("IN CMnMoney "); > > d.add(new Field("attribute",attribute.toString(), > > Field.Store.YES, Field.Index.NO)); > > System.out.println("key is ->"+key+"...Value is > > "+attribute); > > } > > else if (attribute instanceof CMnQuantity) { > > System.out.println("IN CMnQuantity "); > > d.add(new Field("attribute",attribute.toString(), > > Field.Store.YES, Field.Index.NO)); > > System.out.println("key is ->"+key+"...Attribute > is > > "+attribute); > > } > > else if (attribute instanceof CMnEnum) { > > System.out.println("IN CMnEnum "); > > d.add(new Field("attribute",attribute.toString(), > > Field.Store.YES, Field.Index.NO)); > > System.out.println("key is ->"+key+"...Attribute > is > > "+attribute); > > } > > else { > > // see what else is there.... > > } > > try { > > writer.addDocument(d); > > writer.optimize() ; > > writer.close(); > > } > > catch (IOException e1) { > > e1.printStackTrace(); > > } > > } > > > > > > > > Please guide me further as I got stuck at this point. > > > > I have searched a lot about this and all I got is I have to first delete > > that document and then add that document again to my index. > > > -- I'm very responsible, when ever something goes wrong they always say I'm responsible --
