Index Developer Guide

Introduction

Index is a data structure that can be used to accelerate certain query of the table. Different Index can be implemented by developers. Currently, Carbondata supports three types of Indexes:

BloomFilter Index: A space-efficient probabilistic data structure that is used to test whether an element is a member of a set.
Lucene Index: High performance, full-featured text search engine.
Secondary Index: Sencondary index tables to hold blocklets are created as indexes and managed as child tables internally by Carbondata.

Index Provider

When user issues CREATE INDEX index_name ON TABLE main AS 'provider', the corresponding IndexProvider implementation will be created and initialized. Currently, the provider string can be:

class name IndexFactory implementation: Developer can implement new type of Index by extending IndexFactory

When user issues DROP INDEX index_name ON TABLE main, the corresponding IndexFactory class will be called.

Click for more details about Index Management and supported DSL.

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

pFad - (p)hone/(F)rame/(a)nonymizer/(d)eclutterfier! Saves Data!