# Behaviour of match\_phrase\_prefix in ES ES 8.9.0 is different from that in 7.17.7
**URL:** https://discuss.elastic.co/t/behaviour-of-match-phrase-prefix-in-es-es-8-9-0-is-different-from-that-in-7-17-7/348283
**Category:** Elasticsearch
**Created:** [November 30, 2023, 2:29am UTC](https://discuss.elastic.co/t/behaviour-of-match-phrase-prefix-in-es-es-8-9-0-is-different-from-that-in-7-17-7/348283 "2023-11-30T02:29:40Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@elastic-a](https://discuss.elastic.co/u/elastic-a)
#### Post date: [November 30, 2023, 2:29am UTC](https://discuss.elastic.co/t/behaviour-of-match-phrase-prefix-in-es-es-8-9-0-is-different-from-that-in-7-17-7/348283/1 "2023-11-30T02:29:40Z")
ES 8.9.0
With a query having `match_phrase_prefix` of just one term, the search returns expected match; with the same query, percolate by id does not return expected match. The same (both search and percolate) work as expected in ES 7.17.7.
Repro steps:
1. Create a new index with a `str` field of type `text` and a `query` field of type `percolator`
2. Index a doc having `{"str":"the quick brown fox jumps over the lazy dog"}`
3. Perform a \_search `{"query":{"match_phrase_prefix":{"str":{"query":"fox"}}}}` to ensure the doc is searchable (wait until, when not) note \_id
4. Index a query `{"query":{"match_phrase_prefix":{"str":{"query":"fox"}}}}`
5. Percolate by `{"query":{"percolate":{"field":"query","index":"","id":"<_id>"}}}`
Note:
- When ES 7.17.7 is used, all steps return expected results.
- When ES 8.9.0 is used, all steps except the final step return expected results.
- When ES 8.9.0 is used, without the match\_phrase\_prefix query or with the query with two-or-more tokens in #4, all steps return expected results.
And, btw, does `match_phrase_prefix` support single token in the query? Or does it expect two-or-more? There is no mentioning of this nor any change in behaviour in the hrefs below..
Help is appreciated.. Thanks..
> **[Match phrase prefix query | Elasticsearch Guide \[7.17\] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/7.17/query-dsl-match-query-phrase-prefix.html)**
> **[Match phrase prefix query | Elasticsearch Guide \[8.9\] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/8.9/query-dsl-match-query-phrase-prefix.html)**
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### Author:  [@elastic-a](https://discuss.elastic.co/u/elastic-a)
#### Post date: [December 14, 2023, 10:06pm UTC](https://discuss.elastic.co/t/behaviour-of-match-phrase-prefix-in-es-es-8-9-0-is-different-from-that-in-7-17-7/348283/2 "2023-12-14T22:06:45Z")
appreciate any insights on this.. thanks..
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [January 11, 2024, 10:07pm UTC](https://discuss.elastic.co/t/behaviour-of-match-phrase-prefix-in-es-es-8-9-0-is-different-from-that-in-7-17-7/348283/3 "2024-01-11T22:07:39Z")
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