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[[query-dsl-prefix-filter]]
=== Prefix Filter
Filters documents that have fields containing terms with a specified
prefix (*not analyzed*). Similar to phrase query, except that it acts as
a filter. Can be placed within queries that accept a filter.
[source,js]
--------------------------------------------------
{
"constant_score" : {
"filter" : {
"prefix" : { "user" : "ki" }
}
}
}
--------------------------------------------------
[float]
==== Caching
The result of the filter is cached by default. The `_cache` can be set
to `false` in order not to cache it. Here is an example:
[source,js]
--------------------------------------------------
{
"constant_score" : {
"filter" : {
"prefix" : {
"user" : "ki",
"_cache" : false
}
}
}
}
--------------------------------------------------
|
