CODEWITHSUNDEEP
solrlucenesolr4solrnet
Ankita
Ankita

Reputation: 1456

Solr Text field and String field - different search behaviour

I am working on Solr 4+.

I have several fields into my solr schema with different solr field types.

Does the search on text field and string field differs?

Because I am trying to search on string field (which is a copy field of few facet fields) which does not work as expected. The destination string field is indexed and stored both.

However, when I change destination field which a text field (only indexed), it works fine.

Can you suggest why this happens? What is exactly the difference between text and string fields in solr in respect to searches?

Upvotes: 20

Views: 15201

Answers (3)

Chirag goyal
Chirag goyal

Reputation: 494

The fields that the Solr model defines by default are very different.

Without using tokenization or other processes, a string saves a word or sentence as precisely as it is. frequently helpful for facetting, for example, storing exact matches.

Tokenization and secondary processing (such as lower-casing, etc.) are usually handled by text. useful in any situation where we need to match a sentence's partial.

If both fields have the example "This is a sample sentence" indexed, we need to look for that precise content. For a hit in the text field, searching for sample or even samples with stemming enabled may be sufficient. "This is a sample sentence" to get a hit in the string field.

Upvotes: 0

AsadKhan
AsadKhan

Reputation: 1

A general text field that has reasonable, generic cross-language defaults: it tokenizes with StandardTokenizer, removes stop words from case-insensitive "stopwords.txt" (empty by default), and down cases. At query time only, it also applies synonyms.

The StrField type is not analyzed, but indexed/stored verbatim.

Upvotes: 0

MatsLindh
MatsLindh

Reputation: 52912

TextFields usually have a tokenizer and text analysis attached, meaning that the indexed content is broken into separate tokens where there is no need for an exact match - each word / token can be matched separately to decide if the whole document should be included in the response.

StrFields cannot have any tokenization or analysis / filters applied, and will only give results for exact matches. If you need a StrField with analysis or filters applied, you can implement this using a TextField and a KeywordTokenizer.

Upvotes: 36

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