Whitespace Analyzer
The whitespace analyzer divides text into searchable terms wherever
it finds a whitespace character. It leaves all terms in their original
case.
Example
The following example index definition specifies an index on
the summary field using the whitespace analyzer:
{ "mappings": { "fields": { "summary": { "type": "string", "analyzer": "lucene.whitespace" } } } }
Consider a collection named cases with the following documents:
{ "_id": 1, "summary": "No action required at this time." } { "_id": 2, "summary": "Case set aside for future action." } { "_id": 3, "summary": "Frank's case is ready for planning." }
The following query uses the index on the summary field:
db.cases.aggregate([ { $search: { "text": { "query": "Frank's", "path": "summary" } } } ])
The above query returns the following result:
{ "_id" : 3, "summary" : "Frank's case is ready for planning." }
The index is case-sensitive.
db.cases.aggregate([ { $search: { "text": { "query": "Case", "path": "summary" } } } ])
The above query returns the following result:
{ "_id" : 2, "summary" : "Case set aside for future action." }
The document with _id: 3 is not included, because it has the
lower-case string case and the search term is Case.