java - How to index date field in lucene -


i new lucene. have index date field. using following indexwriter constructor in lucene 3.0.0.

indexwriter writer = new indexwriter(fsdirectory.open(indexdir), new whitespaceanalyzer(), true, indexwriter.maxfieldlength.unlimited)

my point is: why needs analyzer when date fields not analyzed,while indexing used field.index.not_analyzed.

you can store date field in fashion..

document doc = new document(); doc.add(new field("modified",         datetools.timetostring(f.lastmodified(), datetools.resolution.minute),         field.store.yes, field.index.not_analyzed));

where f file object...

now use above document indexwriter...

checkout sample code comes lucene... , following link... http://lucene.apache.org/java/2_2_0/api/org/apache/lucene/document/datetools.html

update

field.index not_analyzed

index field's value without using analyzer, can searched. no analyzer used value stored single term. useful unique ids product numbers.

as per lucene javadoc don't need analyzer fields using field.index not_analyzed think design indexwriter expects analyzer indexing exact replica of data not efficient in terms of storage , searching.


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