How to use Lucene DocValues

Lucene's main data structure is inverted index, a big hashmap use the term as the key ... tasks, like sorting, faceting or highlighting. As of Lucene 4.0, a new structure was introduced ... , the DocValues. For example, our sorting code example uses DocValue field to sort the results ... : How to sort Lucene search results The idea is uninvert the inverted index. This is exactly what

Lucene field, StringField vs TextField

and indexed field. doc.add(new StringField("id", id,Field.Store.YES )); For beginners ... , the syntax of Lucene field definition API can be very confusing, and they changes dramatically ... , there is no difference. Read a text file into Java, you always get a string. In Lucene ... all these properties in to an abstraction, this is what TextField for, a sugar class. Using

How to delete document from index in Lucene

in Lucene 0 Sam Lucene index option analyzed vs not analyzed [Delete document by id] Delete ... or relevance issues involves here, just boolean match. Lucene provided several ways to delete ... document, you can delete documents by term, list of terms, query or list of queries. [Delete document ... term. For setting up the Gradle project: How to do term query in Lucene index example package

Lucene sort unexpected docvalues type NONE for field 'date'

" java.lang.IllegalStateException: unexpected docvalues type NONE for field 'date' (expected=SORTED). Use UninvertingReader ... Trying to sort the Lucene search results by a string field, which in my case is a string ... ); Sort sort = new Sort(SortField.FIELD_SCORE, new SortField("date", Type.STRING ... (term); searchIndexAndDisplayResults(termQuery); } } In Lucene 5, the sorting field

How to sort Lucene search results

By default, for any query, Lucene sort the results by the score and this is user wanted ... order. Actually Lucene can sort the matched documents by any criteria you specified, the default ... it to sort. [The overloaded search method] To sort customized criteria you need to use an overloaded ... it accordingly to your requirement. [Sort by date] Below is an example that uses Lucene 5.3.0

Lucene fuzzy search with FuzzyQuery

FuzzyQuery to perform fuzzy search in Lucene. To setup the Gradle project refer How to do term query ... ")) ; searchIndexAndDisplayResults(fuzzyQuery ); } } Outpu fuzzy search: length of top docs: 4 3 Smith ... ("fuzzy search:"); searchFuzzyQuery(); ramDirectory.close(); } public static ... Lucene allows you specify a term that may not exact match a term in index, but similar

How to do term query in Lucene index example

. This example illustrate how to do term query in Lucene. To know more about term What is Lucene Term ... ] There are many ways to query a term in Lucene index, we need a standard procedure that perform ... analyzed vs not analyzed 1 Sam Lucene field boost and query time boost example 2 Jack How to do ... boost and query time boost example 2 Jack How to do Lucene search highlight example 3 Smith

Lucene BooleanQuery is depreacted as of 5.3.0

version in Lucene 5 will be BooleanQuery booleanQuery = new BooleanQuery.Builder ... using Lucene 5.0.0 Gradle ext.luceneVersion= "5.3.0" dependencies { compile group ... Lucene API changes pretty fast, it's a good news or bad news? For beginners, it can be very ... little changes you need to do in the code. Part of the reasons maybe the Lucene codebase

Java JDBC driver connection string syntax and examples

the syntax. Here is a list of JDBC driver connection string examples for major databases. [MySQL ... string. The connection string consists of three parts: the jdbc, the database vendor name and a url ... JDBC is an API standard that allows Java code to access underlying database with an uniform ... , you can replace your database system without change your Java code. So JDBC is an abstraction

Why Gradle resolve dependencies download so slow

when download progressed half. So the problem is the server at is slow. For some Jars ... , because even it's slow, it should not take that long to download just one Jar. I guess it just ... the download and resume it and successfully download it, but I can't do this in Gradle, If I interrupt ... . It should work now. If you refresh Gradle, it will try to download the source Jar, the problem may
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