# Duplicated results across pages in top\_children queries **URL:** \ **Category:** Elasticsearch\ **Created:** [March 28, 2012, 6:53pm UTC](https://discuss.elastic.co/t/duplicated-results-across-pages-in-top-children-queries/7168 "2012-03-28T18:53:18Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Matthew\_A\_Brown](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/matthew_a_brown/32/2699_2.png) [@Matthew\_A\_Brown](https://discuss.elastic.co/u/Matthew_A_Brown)\ **Post date:** [March 28, 2012, 6:53pm UTC](https://discuss.elastic.co/t/duplicated-results-across-pages-in-top-children-queries/7168/1 "2012-03-28T18:53:18Z")
Howdy Shay (and world of ElasticSearch), We briefly discussed on IRC the phenomenon where when performing a top\_children query in a paginated fashion (using "from" and "size" params to paginate), it's possible that the same result document may appear in multiple pages. You indicated that this is a known issue with top\_children, and that increasing the "factor" would help alleviate duplication. My question is whether this is considered a bug (and thus slated for a fix at some point) or more of an irreducible fact about the way top\_children works. I'm mostly just trying to determine whether our application needs to be robust around potential duplication in the long run. Thanks! Mat ---
**Author:** ![kimchy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kimchy/32/44952_2.png) [@kimchy](https://discuss.elastic.co/u/kimchy)\ **Post date:** [March 29, 2012, 2:10pm UTC](https://discuss.elastic.co/t/duplicated-results-across-pages-in-top-children-queries/7168/2 "2012-03-29T14:10:05Z")
Good question :), thats the state currently, I need to spend some time thinking about ti to see if it can be fixed or thats simply the case with top\_children... On Wed, Mar 28, 2012 at 8:53 PM, Matthew A. Brown [mat.a.brown@gmail.com](mailto:mat.a.brown@gmail.com)wrote: > Howdy Shay (and world of Elasticsearch), > > We briefly discussed on IRC the phenomenon where when performing a > top\_children query in a paginated fashion (using "from" and "size" > params to paginate), it's possible that the same result document may > appear in multiple pages. You indicated that this is a known issue > with top\_children, and that increasing the "factor" would help > alleviate duplication. > > My question is whether this is considered a bug (and thus slated for a > fix at some point) or more of an irreducible fact about the way > top\_children works. I'm mostly just trying to determine whether our > application needs to be robust around potential duplication in the > long run. > > Thanks! > Mat ---
**Author:** ![Matthew\_A\_Brown](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/matthew_a_brown/32/2699_2.png) [@Matthew\_A\_Brown](https://discuss.elastic.co/u/Matthew_A_Brown)\ **Post date:** [March 29, 2012, 2:18pm UTC](https://discuss.elastic.co/t/duplicated-results-across-pages-in-top-children-queries/7168/3 "2012-03-29T14:18:18Z")
Thanks! Keep me posted : ) On Thu, Mar 29, 2012 at 10:10, Shay Banon [kimchy@gmail.com](mailto:kimchy@gmail.com) wrote: > Good question :), thats the state currently, I need to spend some time > thinking about ti to see if it can be fixed or thats simply the case with > top\_children... > > On Wed, Mar 28, 2012 at 8:53 PM, Matthew A. Brown [mat.a.brown@gmail.com](mailto:mat.a.brown@gmail.com) > wrote: > > > Howdy Shay (and world of Elasticsearch), > > > > We briefly discussed on IRC the phenomenon where when performing a > > top\_children query in a paginated fashion (using "from" and "size" > > params to paginate), it's possible that the same result document may > > appear in multiple pages. You indicated that this is a known issue > > with top\_children, and that increasing the "factor" would help > > alleviate duplication. > > > > My question is whether this is considered a bug (and thus slated for a > > fix at some point) or more of an irreducible fact about the way > > top\_children works. I'm mostly just trying to determine whether our > > application needs to be robust around potential duplication in the > > long run. > > > > Thanks! > > Mat ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 3:34am UTC](https://discuss.elastic.co/t/duplicated-results-across-pages-in-top-children-queries/7168/4 "2017-07-06T03:34:13Z")