# Why is the bool clause 'must' not used in following

**URL:** https://discuss.elastic.co/t/why-is-the-bool-clause-must-not-used-in-following/115414
**Category:** Elasticsearch
**Created:** [January 13, 2018, 5:03pm UTC](https://discuss.elastic.co/t/why-is-the-bool-clause-must-not-used-in-following/115414 "2018-01-13T17:03:58Z")
**Posts on this page:** 5
**Page:** 1

<div class="post-metadata">

### Author: ![sibh8](https://avatars.discourse-cdn.com/v4/letter/s/eb8c5e/32.png) [@sibh8](https://discuss.elastic.co/u/sibh8)
#### Post date: [January 13, 2018, 5:03pm UTC](https://discuss.elastic.co/t/why-is-the-bool-clause-must-not-used-in-following/115414/1 "2018-01-13T17:03:58Z")

</div>

I have the following data set.

```auto
POST /my_store/products/_bulk
{ "index": { "_id": 1 }}
{ "price" : 10, "productID" : "XHDK-A-1293-#fJ3" }
{ "index": { "_id": 2 }}
{ "price" : 20, "productID" : "KDKE-B-9947-#kL5" }
{ "index": { "_id": 3 }}
{ "price" : 30, "productID" : "JODL-X-1937-#pV7" }
{ "index": { "_id": 4 }}
{ "price" : 30, "productID" : "QQPX-R-3956-#aD8" }

```

Corresponding to following SQL statement.

```auto
select product
from products
where (price = 20 or productID = 'XHDK-A-1293-#fJ3')
and (price != 30)

```

I have a DSL query in Elasticsearch.

```auto
GET /my_store/products/_search
{
  "query":{
    "constant_score": {
        "filter": {
          "bool":{
            "should":[
                {"term":{"price":20}},
                {"term":{ "productID" : "XHDK-A-1293-#fJ3"}}
              ],
            "must_not":{
                "term" : {"price" : 30}
              }
          }
        }
    }
  }
}

```

Why have we not used a must between the conditions

```auto
"should":[
                {"term":{"price":20}},
                {"term":{ "productID" : "XHDK-A-1293-#fJ3"}}
              ]

```

and

```auto
 "must_not":{
                "term" : {"price" : 30}
              }

```

Thanks

---

<div class="post-metadata">

### Author: ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [January 13, 2018, 11:50pm UTC](https://discuss.elastic.co/t/why-is-the-bool-clause-must-not-used-in-following/115414/2 "2018-01-13T23:50:48Z")

</div>

What is the result you are getting?

---

<div class="post-metadata">

### Author: ![sibh8](https://avatars.discourse-cdn.com/v4/letter/s/eb8c5e/32.png) [@sibh8](https://discuss.elastic.co/u/sibh8)
#### Post date: [January 14, 2018, 3:06pm UTC](https://discuss.elastic.co/t/why-is-the-bool-clause-must-not-used-in-following/115414/3 "2018-01-14T15:06:28Z")

</div>

Hi,

Thanks for the reply. I am getting an error.

Is it that by default if the operation between 2 conditions is 'must' or is it that must\_not is a combination of 'must' and a 'not' of a condition?

Thanks

---

<div class="post-metadata">

### Author: ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [January 14, 2018, 4:04pm UTC](https://discuss.elastic.co/t/why-is-the-bool-clause-must-not-used-in-following/115414/4 "2018-01-14T16:04:39Z")

</div>

Can you please share the full error message?

---

<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: [February 11, 2018, 4:04pm UTC](https://discuss.elastic.co/t/why-is-the-bool-clause-must-not-used-in-following/115414/5 "2018-02-11T16:04:41Z")

</div>

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