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FullTextIndex

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Full Text

Full Text indexes allow to index text as single word and its radix. Full text indexes are like a search engine on your database. If you are using the Lucene engine, please refer to Lucene Full-Text index.

Create a FullText Index

Example:

create index City.name on City (name) FULLTEXT

This will create a FullText index on the property name of the class City, with default configuration.

Configuration parameters of FullText Index:

Parameter Default Description
indexRadix true Word prefixes will be also index
ignoreChars " Chars to skip when indexing
separatorChars \r\n\t:;,.|+*/\=!?[](.md)
minWordLength 3 Minimum word length to index
stopWords "the in a at as and or for his her him this that what which while up with be was were is" Stop words escluded from indexing

Configure a FullText Index (OrientDB v. 1.7)

To configure fulltext index use the metadata field.

Example with SQL:

create index City.name on City (name) FULLTEXT METADATA {"indexRadix" : true, "ignoreChars" : "&" , "separatorChars" : " |()", "minWordLength" : 4 , "stopWords" : ['the','of']}

Example with Java;

OSchema schema = db.getMetadata().getSchema();
OClass city = schema.getClass("City");
ODocument metadata = new ODocument();
metadata.field("indexRadix", true);
metadata.field("stopWords", Arrays.asList(new String[] { "the", "in", "a", "at" }));
metadata.field("separatorChars", " :;?[](.md)");
metadata.field("ignoreChars", "$&");
metadata.field("minWordLength", 5);
city.createIndex("City.name", "FULLTEXT", null, metadata, null, new String[] { "name" });
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