java - BigQuery Pagination through large result set with cloud library -


i working on accessing data google bigquery, data 500mb need transform part of requirement. setting allow large results, setting destination table etc.

i have written java job in google's new cloud library since recommended - com.google.cloud:google-cloud-bigquery:0.21.1-beta (i have tried 0.20 beta without fruitful results)

i having problem pagination of data, library inconsistent in fetching results page wise. here code snippet,

code snippet

    system.out.println("accessing handle of response");     queryresponse response = bigquery.getqueryresults(jobid, queryresultsoption.pagesize(10000));     system.out.println("got handle of response");      system.out.println("accessing results");     queryresult result = response.getresult();     system.out.println("got handle of result. total rows: "+result.gettotalrows());      system.out.println("reading results");     int pageindex = 0;     int rowid = 0;     while (result != null) {         system.out.println("reading page: "+ pageindex);         if(result.hasnextpage())         {             system.out.println("there next page");                }         else         {             system.out.println("no next page");         }          (list<fieldvalue> row : result.iterateall()) {             system.out.println("row: " + rowid);             rowid++;         }          system.out.println("getting next page: ");         pageindex++;         result = result.getnextpage();     }

output print statements

accessing handle of response   got handle of response   accessing results   got handle of result. total rows: 9617008   reading results   reading page: 0   there next page   row: 0   row: 1   row: 2   row: 3   :   :   row: 9999   row: 10000   row: 10001   :   :   row: 19999   :   :

please note never hits/prints - "getting next page: ".

my expectation data in chunks of 10000 rows @ time. please note if run same code on query returns 10-15k rows , set pagesize 100 records, "getting next page:" after every 100 rows. known issue beta library?


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