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---
navigation_title: "Match boolean prefix"
mapped_pages:
- https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-match-bool-prefix-query.html
---
# Match boolean prefix query [query-dsl-match-bool-prefix-query]
A `match_bool_prefix` query analyzes its input and constructs a [`bool` query](/reference/query-languages/query-dsl/query-dsl-bool-query.md) from the terms. Each term except the last is used in a `term` query. The last term is used in a `prefix` query. A `match_bool_prefix` query such as
```console
GET /_search
{
"query": {
"match_bool_prefix" : {
"message" : "quick brown f"
}
}
}
```
where analysis produces the terms `quick`, `brown`, and `f` is similar to the following `bool` query
```console
GET /_search
{
"query": {
"bool" : {
"should": [
{ "term": { "message": "quick" }},
{ "term": { "message": "brown" }},
{ "prefix": { "message": "f"}}
]
}
}
}
```
An important difference between the `match_bool_prefix` query and [`match_phrase_prefix`](/reference/query-languages/query-dsl/query-dsl-match-query-phrase-prefix.md) is that the `match_phrase_prefix` query matches its terms as a phrase, but the `match_bool_prefix` query can match its terms in any position. The example `match_bool_prefix` query above could match a field containing `quick brown fox`, but it could also match `brown fox quick`. It could also match a field containing the term `quick`, the term `brown` and a term starting with `f`, appearing in any position.
## Parameters [_parameters]
By default, `match_bool_prefix` queries' input text will be analyzed using the analyzer from the queried fields mapping. A different search analyzer can be configured with the `analyzer` parameter
```console
GET /_search
{
"query": {
"match_bool_prefix": {
"message": {
"query": "quick brown f",
"analyzer": "keyword"
}
}
}
}
```
`match_bool_prefix` queries support the [`minimum_should_match`](/reference/query-languages/query-dsl/query-dsl-minimum-should-match.md) and `operator` parameters as described for the [`match` query](/reference/query-languages/query-dsl/query-dsl-match-query.md#query-dsl-match-query-boolean), applying the setting to the constructed `bool` query. The number of clauses in the constructed `bool` query will in most cases be the number of terms produced by analysis of the query text.
The [`fuzziness`](/reference/query-languages/query-dsl/query-dsl-match-query.md#query-dsl-match-query-fuzziness), `prefix_length`, `max_expansions`, `fuzzy_transpositions`, and `fuzzy_rewrite` parameters can be applied to the `term` subqueries constructed for all terms but the final term. They do not have any effect on the prefix query constructed for the final term.