Date: 2004-07-08T13:45:44 Editor: 128.230.38.212 <> Wiki: Jakarta Lucene Wiki Page: IndexingDateFields URL: http://wiki.apache.org/jakarta-lucene/IndexingDateFields
no comment Change Log: ------------------------------------------------------------------------------ @@ -1,3 +1,3 @@ -If only year, month, day are relevant to your situation, index the text string "YYYYMMDD" as Field.Keyword, rather than using DateField or Field.Keyword(String, Date). Why? Because RangeQuery will expand into a BooleanQuery of all terms in the range, and DateField represents down to the millisecond level and can expand into more terms than are allowed in a BooleanQuery. +If only year, month, day are relevant to your situation, index the text string "YYYYMMDD" as [http://jakarta.apache.org/lucene/docs/api/org/apache/lucene/document/Field.html#Keyword(java.lang.String,%20java.lang.String) Field.Keyword(String, String)], rather than using [http://jakarta.apache.org/lucene/docs/api/org/apache/lucene/document/DateField.html DateField] or [http://jakarta.apache.org/lucene/docs/api/org/apache/lucene/document/Field.html#Keyword(java.lang.String,%20java.util.Date) Field.Keyword(String, Date)]. Why? Because [http://jakarta.apache.org/lucene/docs/api/org/apache/lucene/search/RangeQuery.html RangeQuery] will expand into a [http://jakarta.apache.org/lucene/docs/api/org/apache/lucene/search/BooleanQuery.html BooleanQuery] of all terms in the range, and [http://jakarta.apache.org/lucene/docs/api/org/apache/lucene/document/DateField.html DateField] represents down to the millisecond level and can expand into more terms than are allowed in a [http://jakarta.apache.org/lucene/docs/api/org/apache/lucene/search/BooleanQuery.html BooleanQuery]. -Another reason to do this is that you will be able to index dates before the Unix Epoch (Jan 1, 1970) which DateField cannot handle (as of Lucene 1.3; I do not know what's in the works for later versions). +Another reason to do this is that you will be able to index dates before the Unix Epoch (Jan 1, 1970) which [http://jakarta.apache.org/lucene/docs/api/org/apache/lucene/document/DateField.html DateField] cannot handle (as of Lucene 1.3; I do not know what's in the works for later versions). --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
