How can we hard delete a record using a Salesforce Apex class by code?

Hi Madhulika,

Hard delete is done by using DataBase.emptyRecycleBin method in the Batch class. Create a sample Batch class as mentioned below and use DataBase.emptyRecycleBin method in the Batch class.

global class BatchDeletion implements Database.Batchable<sObject>, Schedulable
{
global BatchDeletion()
{
//constuctor
}

global Database.QueryLocator start(Database.BatchableContext bc)
{
//query to return all expired Case Share records
return Database.getQueryLocator([Select id from Account where Name='Test Account12']);
}

global void execute(SchedulableContext sc)
{
//execute the batch
BatchDeletion deleteCS = new BatchDeletion();
ID batchprocessid = Database.executeBatch(deleteCS);
}

global void execute(Database.BatchableContext BC, list<sObject> scope)
{
System.debug('## deleting '+scope.size()+' case share recs');

//delete list of expired Case Share records
delete scope;
Database.emptyRecycleBin(scope);
}

global void finish(Database.BatchableContext BC)
{
//no post processing
/* System.debug('## Batch Job Finished ##');
UpdateAccountFields m = new UpdateAccountFields ();
String sch = '20 30 8 10 2 ?';
system.schedule('Merge Job', sch, m);*/

}
}

Hope this will help you.

Thanks.