以下是带有值的索引字段:
EffectiveDate="1970"
ExpirationDate="2035"
创建索引和搜索的代码:
public class IndexTest{
static Analyzer analyzer = new StandardAnalyzer();
static IndexSearcher isearcher;
@BeforeClass
public static void createIndex() throws CorruptIndexException, LockObtainFailedException, IOException{
Store s = Field.Store.YES;
Store ds = Field.Store.YES;
Index IA = Field.Index.ANALYZED;
Index INA = Field.Index.NOT_ANALYZED;
IndexWriter iwriter = new IndexWriter("C://tmp/testindex/sample", analyzer, true);
iwriter.setMaxFieldLength(25000);
//Sample dummy docs
Document doc = new Document();
Document doc1 = new Document();
Document doc2 = new Document();
Document doc3 = new Document();
doc.add(new Field("EffectiveDate", "1970", ds, IA));
doc.add(new Field("ExpirationDate", "2035", ds, IA));
iwriter.addDocument(doc);
doc1.add(new Field("EffectiveDate", "1970", ds, IA));
doc1.add(new Field("ExpirationDate", "2035", ds, IA));
iwriter.addDocument(doc1);
iwriter.optimize();
iwriter.close();
}
@Test
public void testRangeQuery() throws java.text.ParseException, Exception, IOException{
isearcher = new IndexSearcher("E://tmp/testindex/sample");
// String rQuery = " EffectiveDate : [* TO 1971 ]";
// String rQuery = " EffectiveDate : [1960 TO 2000]";
// String rQuery = " ExpirationDate : [2000 TO 2050]";
//Below Query is Not Working
String rQuery = " ExpirationDate : [2000 TO *]";
MultiFieldQueryParser parser = new MultiFieldQueryParser(
new String[] {
"EffectiveDate"
,"ExpirationDate"}, analyzer);
//parser.setDefaultOperator(QueryParser.Operator.OR);
parser.setAllowLeadingWildcard(true);
Query query = parser.parse(rQuery);
System.out.println("Str = "+rQuery);
System.out.println("query = "+query);
Hits hits = isearcher.search(query);
assertEquals(2, hits.length());
for (int i = 0; i < hits.length(); i++) {
Document hitDoc = hits.doc(i);
System.out.println("hitDoc = "+hitDoc);
System.out.println(hitDoc.get("Code"));
}
System.out.println("1query = "+query);
}
逻辑: - 当前日期应该在这两个字段之间。
低于范围查询正在运行: -
EffectiveDate : [ * TO 2013-06-26 ]
低于范围查询无效: -
ExpirationDate : [2013-06-26 TO *]
任何帮助都会非常明显。谢谢提前
答案 0 :(得分:1)
Core Lucene查询解析器在版本3.6之前不接受开放式范围(如ExpirationDate : [2013-06-26 TO *]
)(参见the related ticket)。
您使用ExpirationDate : [2013-06-26 TO null]
的答案可能会误导您。 null
不被视为特殊值,而只是一个字!按字典顺序,标点符号(*
)在数字2013
之前,数字在字母之前(null
)(非常一般地说,订购基于Unicode value,我相信)。
因此,虽然ExpirationDate : [2013-06-26 TO null]
和EffectiveDate : [ * TO 2013-06-26 ]
有效,但
ExpirationDate : [2013-06-26 TO *]
和EffectiveDate : [null TO 2013-06-26 ]
都不会。
在版本2.4.0中,您需要做的是为搜索提供足够的高值和低值,以便有效地考虑搜索开放,无论是出于何种目的,例如:
+EffectiveDate : [0000-01-01 TO 2013-06-26 ] +ExpirationDate : [2013-06-26 TO 9999-12-31]
使用类似的东西:
+ExpirationDate : [2013-06-26 TO null] +EffectiveDate : [ * TO 2013-06-26 ]
可能有效,但出于所有错误的原因。
答案 1 :(得分:0)
低于范围查询解决了我的问题: -
ExpirationDate:[2013-06-26 TO null]