Magento : How to add Indexes in a custom module

Follow these steps:

config.xml:

<index>                              

<indexer>

<cms_indexer>

<model>module/cmsindexer</model>

</cms_indexer>

</indexer>

</index>            

Model:

cmsindexer.php

Class Module_Model_CmsIndexer extends Mage_Index_Model_Indexer_Abstract

{

public function getName(){

                return 'Add CMS Cache';

}

public function getDescription(){

return 'Rebuild Cache Index for all CMS Pages';

}

protected function _processEvent(Mage_Index_Model_Event $event){

// process

}

public function reindexAll(){

//Your Function to be executed

}