# How to disable TF/IDF completely **URL:** \ **Category:** Elasticsearch\ **Created:** [March 12, 2018, 9:51am UTC](https://discuss.elastic.co/t/how-to-disable-tf-idf-completely/123518 "2018-03-12T09:51:31Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![ahmadazimi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ahmadazimi/32/25247_2.png) [@ahmadazimi](https://discuss.elastic.co/u/ahmadazimi)\ **Post date:** [March 12, 2018, 9:51am UTC](https://discuss.elastic.co/t/how-to-disable-tf-idf-completely/123518/1 "2018-03-12T09:51:31Z")
I'm trying to query small pieces of sentences in about 500k records and TF/IDF makes results so bad. I wanna disable it at index time or query time (without using constant\_score). Has anyone has any idea?! ---
**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:** [March 12, 2018, 10:26am UTC](https://discuss.elastic.co/t/how-to-disable-tf-idf-completely/123518/2 "2018-03-12T10:26:33Z")
> [@ahmadazimi](#): > > and TF/IDF makes results so bad. What do you mean? ---
**Author:** ![ahmadazimi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ahmadazimi/32/25247_2.png) [@ahmadazimi](https://discuss.elastic.co/u/ahmadazimi)\ **Post date:** [March 12, 2018, 11:37am UTC](https://discuss.elastic.co/t/how-to-disable-tf-idf-completely/123518/3 "2018-03-12T11:37:27Z")
I only need check if a term exists or not in the field, but TF/IDF use word order, count and frequency which they make final scores not acceptable in my case. PS1. boosts are too important for each fields separately. PS2. I should use multi\_match query (cross\_fields) PS3. this is my mapping params for one field: 'search' =\> [ 'type' =\> 'text', 'norms' =\> false, 'index\_options' =\> 'docs', 'analyzer' =\> 'index\_time\_persian', 'search\_analyzer' =\> 'search\_time\_persian', 'term\_vector' =\> 'with\_positions\_offsets', ], ---
**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:** [March 12, 2018, 12:15pm UTC](https://discuss.elastic.co/t/how-to-disable-tf-idf-completely/123518/4 "2018-03-12T12:15:15Z")
So you want to use a `term` query within a `bool -> filter` clause, no? May be I misunderstand in which case provide a full recreation script as described in [About the Elasticsearch category](https://discuss.elastic.co/t/about-the-elasticsearch-category/21). It will help to better understand what you are doing. Please, try to keep the example as simple as possible. A full reproduction script will help readers to understand, reproduce and if needed fix your problem. ---
**Author:** ![byronvoorbach](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/byronvoorbach/32/8283_2.png) [@byronvoorbach](https://discuss.elastic.co/u/byronvoorbach)\ **Post date:** [March 12, 2018, 3:44pm UTC](https://discuss.elastic.co/t/how-to-disable-tf-idf-completely/123518/5 "2018-03-12T15:44:22Z")
You could use [constant\_score](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-constant-score-query.html) query in order to disregard TF/IDF 🙂 ---
**Author:** ![ahmadazimi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ahmadazimi/32/25247_2.png) [@ahmadazimi](https://discuss.elastic.co/u/ahmadazimi)\ **Post date:** [March 13, 2018, 7:58am UTC](https://discuss.elastic.co/t/how-to-disable-tf-idf-completely/123518/6 "2018-03-13T07:58:14Z")
Thank you @dadoonet Ok, I'll prepare it as soon as possible. ---
**Author:** ![ahmadazimi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ahmadazimi/32/25247_2.png) [@ahmadazimi](https://discuss.elastic.co/u/ahmadazimi)\ **Post date:** [March 13, 2018, 7:59am UTC](https://discuss.elastic.co/t/how-to-disable-tf-idf-completely/123518/7 "2018-03-13T07:59:19Z")
@byronvoorbach Unfortunately constant\_score completely remove my fields boosting and return 0 or 1 as score. I can't use it in a normal way. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 10, 2018, 7:59am UTC](https://discuss.elastic.co/t/how-to-disable-tf-idf-completely/123518/8 "2018-04-10T07:59:33Z")
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