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I am writing a batch class on external object. Here I am using database.getQuerylocator in start method as the result will contain more thank 50k records.

Batch class code:

global class <batchclassname> implements Database.Batchable<sObject>, Database.Stateful, Database.AllowsCallouts {
    global String sQuery;
    global Database.QueryLocator start(Database.BatchableContext BC){
       sQuery = 'SELECT Id,....other field from <externalobject> ';
        return Database.getQueryLocator(sQuery);
    }
    global void execute(Database.BatchableContext BC, List<sObject> scope) {
//    
    }
    global void finish(Database.BatchableContext BC){

    }
}   

Here in logs rows = -1

Can anyone help me if there is any issue with the code or I need to do any other configuration?

Note : In external data source Server Driven Pagination = true Request row count = true

Same code is working fine with Iterable. Since the records are more I can not use Iterable interface.

  • the below code is returning values in anonymous block: String sQuery = 'SELECT Id,....other field from <externalobject> limit 1'; system.debug('result'+Database.getQueryLocator(sQuery)); system.debug(Database.getQueryLocator(sQuery)); – Muskan Gupta Apr 26 '19 at 16:19
  • 2
    Pretty sure query locators are only supported on the Salesforce Database. – Adrian Larson Apr 26 '19 at 16:51

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