There has been several discussions on this list on how to create an
"auto complete" feature. What solution fits best for you depends on
your needs and the behavior of your users, i.e. what sort of documents
it is your index contains and what part of the documents your users
are searching for.
I think think the most common solution recommended is to use ngrams.
This is however probably only interesting if you want to "auto
complete" on small texts such as titles, subject lines, et c.
Personally I prefere training a trie with common user queries (that
leads to hits users clicks on). This does however require that the
system have enough user load. See LUCENE-625 for such a trie.
karl
28 nov 2008 kl. 10.55 skrev naveen.a:
Hi,
Thanks for your reply,
The actual problem is when the user is entering data in a textfield,
the
suggession list should come below the textfield, so when the
character 'l'
is entered, the suggessions should come as starts with 'l' and if he
entered
the full word say 'library ' and then he gives a space and he
continues
typing for the next word say 'library inf' (actual word is "library
information"), so here the word "library information" is indexed
(untokenized or tokenized), now i have to search by the exact
sequence, if i
apply query as "library inf*", the document should be returned, so i
am
looking for lucene advanced search techniques and i thought it can be
possible with SpanFirstQuery because it can search by sequence, but
it cant
search as a startswith (for "library inf*")
Karl Wettin wrote:
SpanTermQuery is a TermQuery and not a WildcardQuery. You could use a
SpanRegexQuery. You could also make your own SpanWildcardQuery based
on either WildcardQuery or SpanRegexQuery.
You should probably tell us a bit about the problem you try to solve
rather than asking about the solution you have thought of.
27 nov 2008 kl. 14.47 skrev naveen.a:
Below is a document in lucene
----------------------------------------------
ID : 1
110_a : library information
----------------------------------------------
Case 1:
Term term1 = new Term("110_a", "library");
SpanFirstQuery spanFirstQuery = new SpanFirstQuery(new
SpanTermQuery(term1),
1);
Case 2:
Term term1 = new Term("110_a", "l*");
SpanFirstQuery spanFirstQuery = new SpanFirstQuery(new
SpanTermQuery(term1),
1);
if i apply first query, the documnet is found,
but, it is not found for the second query
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