# Assignment of QueryBuilder variable is by refrence?

**URL:** <https://discuss.elastic.co/t/assignment-of-querybuilder-variable-is-by-refrence/122190>\
**Category:** Elasticsearch\
**Created:** [March 2, 2018, 4:50am UTC](https://discuss.elastic.co/t/assignment-of-querybuilder-variable-is-by-refrence/122190 "2018-03-02T04:50:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![joker](https://avatars.discourse-cdn.com/v4/letter/j/5f9b8f/32.png) [@joker](https://discuss.elastic.co/u/joker)\
**Post date:** [March 2, 2018, 4:50am UTC](https://discuss.elastic.co/t/assignment-of-querybuilder-variable-is-by-refrence/122190/1 "2018-03-02T04:50:08Z")

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While doing this =\>

```
public void fun1(){
    QueryBuilder qb1 = ...build a query by, say, two must conditions...
    fun2(qb1);
}

public void fun2(QueryBuilder qb1){
    QueryBuilder qb2 = qb1;// why they have same refrence ?
    // if I add another must query in qb2 it is also reflected in qb1, why ?
}

```

Why such behaviour ? Any way to solve this ?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 30, 2018, 5:02am UTC](https://discuss.elastic.co/t/assignment-of-querybuilder-variable-is-by-refrence/122190/2 "2018-03-30T05:02:26Z")

</div>

Closed on March 30, 2018, 5:02am UTC

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