37.10. Configuration and fulltext indexes

At the time of creation extra configuration can be specified to control the behavior of the index and which backend to use. For example to create a Lucene fulltext index:

IndexManager index = graphDb.index();
Index<Node> fulltextMovies = index.forNodes( "movies-fulltext",
        MapUtil.stringMap( IndexManager.PROVIDER, "lucene", "type", "fulltext" ) );
fulltextMovies.add( theMatrix, "title", "The Matrix" );
fulltextMovies.add( theMatrixReloaded, "title", "The Matrix Reloaded" );
// search in the fulltext index
Node found = fulltextMovies.query( "title", "reloAdEd" ).getSingle();

Here’s an example of how to create an exact index which is case-insensitive:

Index<Node> index = graphDb.index().forNodes( "exact-case-insensitive",
        stringMap( "type", "exact", "to_lower_case", "true" ) );
Node node = graphDb.createNode();
index.add( node, "name", "Thomas Anderson" );
assertContains( index.query( "name", "\"Thomas Anderson\"" ), node );
assertContains( index.query( "name", "\"thoMas ANDerson\"" ), node );
[Tip]Tip

In order to search for tokenized words, the query method has to be used. The get method will only match the full string value, not the tokens.

The configuration of the index is persisted once the index has been created. The provider configuration key is interpreted by Neo4j, but any other configuration is passed onto the backend index (e.g. Lucene) to interpret.

Lucene indexing configuration parameters

Parameter Possible values Effect

type

exact, fulltext

exact is the default and uses a Lucene keyword analyzer. fulltext uses a white-space tokenizer in its analyzer.

to_lower_case

true, false

This parameter goes together with type: fulltext and converts values to lower case during both additions and querying, making the index case insensitive. Defaults to true.

analyzer

the full class name of an Analyzer

Overrides the type so that a custom analyzer can be used. Note: to_lower_case still affects lowercasing of string queries. If the custom analyzer uppercases the indexed tokens, string queries will not match as expected.