global class BatchHandlerForUpdateSequenceinCAPAGT implements Database.Batchable<sObject> { 
    global Database.QueryLocator start(Database.BatchableContext BC) { 
        String query = 'select id,Record_Type_Name__c,Sequence__c,Adhoc_Sequence__c,Sequence_Position__c from General_Task__c where CAPA__c!=NULL'; 
        return Database.getQueryLocator(query); 
    } 
    global void execute(Database.BatchableContext BC, List<General_Task__c> genTasks) { 
        for(General_Task__c gtask:genTasks){   
            if(gtask.Record_Type_Name__c != 'AdhocTask'){ 
                if(String.isBlank(gtask.Sequence__c)){   
                    gtask.Sequence__c=String.valueof(integer.valueof(gtask.Sequence_Position__c));   
                } 
            }else {   
                if(String.isBlank(gtask.Adhoc_Sequence__c)){ 
                    gtask.Adhoc_Sequence__c=String.valueof(integer.valueof(gtask.Sequence_Position__c));  
                }  
            }   
        } 
        try { 
            update genTasks; 
        } catch(Exception e) { 
            System.debug(e); 
        } 
    }    
    global void finish(Database.BatchableContext BC) { 
        // execute any post-processing operations 
    } 
}
 

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