Retrieving specific fields in a Solr query?
/?q=query&fl=field1,field2,field3
lucene
Why are document stores like Lucene / Solr not included in NoSQL conversations?
I once listened to an interview with author Ursula K. LeGuin about fiction writing. The interviewer asked her about authors who work in different genre of writing. What makes one author a romance writer, and another a mystery writer, and another a science fiction writer? LeGuin responded by explaining: Genre is about marketing, not about … Read more
How does Lucene work
Lucene is an inverted full-text index. This means that it takes all the documents, splits them into words, and then builds an index for each word. Since the index is an exact string-match, unordered, it can be extremely fast. Hypothetically, an SQL unordered index on a varchar field could be just as fast, and in … Read more
Comparison of Lucene Analyzers
In general, any analyzer in Lucene is tokenizer + stemmer + stop-words filter. Tokenizer splits your text into chunks, and since different analyzers may use different tokenizers, you can get different output token streams, i.e. sequences of chunks of text. For example, KeywordAnalyzer you mentioned doesn’t split the text at all and takes all the … Read more