lucene的distinct问题
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highriver
2008-10-10
有类似下面需求的问题：
I created small Lucene's application which stores lot of my users infomation, on of it is zipcode in numeric format eg. 50501, 63601 - zip codes are stored in Text fields so they are fully searchable what I want now to do is getting all unique zipcodes which was stored so far. Something like SQL: select distinct zipcode from ... Is it possible? 各位是怎么解决的。 |
