search: keywords: ['Java API', 'OClass', 'index', 'OIndex']

OClass - createIndex()

This method creates an index on the given fields.

Creating Indexes

OrientDB provides support for several different types of indexes, which can help improve performance in retrieving records. Using this method, you can create them on a particular class, indexing the given fields (that is, properties), on the class.

Syntax

// METHOD 1
OIndex<?> OClass().createIndex(String name,
	OClass.INDEX_TYPE type,
	String... fields)

// METHOD 2
OIndex<?> OClass().createIndex(String name, 
	String type-name, 
	OProgressListener listener,
	ODocument metadata, 
	String... fields)

// METHOD 3
OIndex<?> OClass().createIndex(String name, 
	String type-name,
	OProgressListener listener
	ODocument metadata,
	String algorithm,
	String... fields)

Argument	Type	Description
`name`	`String`	Defines the index name
`type`	`OClass.INDEX_TYPE`	Defines the index type
`fields`	`String`	Defines the fields to index
`type-name`	`String`	Defines the index type, as a string
`listener`	`OProgressListener`	Defines the progress listener for the index
`metadata`	`ODocument`	Defines metadata for the index
`algorithm`	`String`	Defines the algorithm to use

Return Value

This method creates an index on the given properties for the class. It then returns the index as an OIndex instance.