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[DOCS] Interval query max_gaps in all_of rule (#119963) (#119998)

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Add more explanation how `max_gaps` work in interval queries with
`all_of` rule.

Closes #113554
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Mayya Sharipova 2025-01-10 16:26:50 -05:00 • committed by GitHub
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docs/reference/query-dsl/intervals-query.asciidoc
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@ -303,12 +303,22 @@ matches. Defaults to `-1`.
If unspecified or set to `-1`, there is no width restriction on the match. If
set to `0`, the terms must appear next to each other.
Internal intervals can have their own `max_gaps` values. In this case
we first find internal intervals with their `max_gaps` values, and then
combine them to see if a gap between internal intervals match
the value of `max_gaps` of the `all_of` rule.
For examples, how `max_gaps` works, see <<interval-max_gaps-all-rule>>.
--
`ordered`::
(Optional, Boolean) If `true`, intervals produced by the rules should appear in
the order in which they are specified. Defaults to `false`.
If `ordered` is `false`, intervals can appear in any order,
including overlapping with each other.
`filter`::
(Optional, <<interval_filter,interval filter>> rule object) Rule used to filter
returned intervals.
@ -468,3 +478,94 @@ This query does *not* match a document containing the phrase `hot porridge is
salty porridge`, because the intervals returned by the match query for `hot
porridge` only cover the initial two terms in this document, and these do not
overlap the intervals covering `salty`.
[[interval-max_gaps-all-rule]]
===== max_gaps in `all_of` ordered and unordered rule
The following `intervals` search returns documents containing `my
favorite food` without any gap, followed by `cold porridge` that
can have at most 4 tokens between "cold" and "porridge". These
two inner intervals when combined in the outer `all_of` interval,
must have at most 1 gap between each other.
Because the `all_of` rule has `ordered` set to `true`, the inner
intervals are expected to be in the provided order. Thus,
this search would match a `my_text` value of `my favorite food is cold
porridge` but not `when it's cold my favorite food is porridge`.
[source,console]
--------------------------------------------------
POST _search
{
"query": {
"intervals" : {
"my_text" : {
"all_of" : {
"ordered" : true, <1>
"max_gaps": 1,
"intervals" : [
{
"match" : {
"query" : "my favorite food",
"max_gaps" : 0,
"ordered" : true
}
},
{
"match" : {
"query" : "cold porridge",
"max_gaps" : 4,
"ordered" : true
}
}
]
}
}
}
}
}
--------------------------------------------------
<1> The `ordered` parameter is set to `true`, so intervals must appear in the order specified.
Below is the same query, but with `ordered` set to `false`. This means that
intervals can appear in any order, even overlap with each other.
Thus, this search would match a `my_text` value of `my favorite food is cold
porridge`, as well as `when it's cold my favorite food is porridge`.
In `when it's cold my favorite food is porridge`, `cold .... porridge` interval
overlaps with `my favorite food` interval.
[source,console]
--------------------------------------------------
POST _search
{
"query": {
"intervals" : {
"my_text" : {
"all_of" : {
"ordered" : false, <1>
"max_gaps": 1,
"intervals" : [
{
"match" : {
"query" : "my favorite food",
"max_gaps" : 0,
"ordered" : true
}
},
{
"match" : {
"query" : "cold porridge",
"max_gaps" : 4,
"ordered" : true
}
}
]
}
}
}
}
}
--------------------------------------------------
<1> The `ordered` parameter is set to `true`, so intervals can appear in any order,
even overlap with each other.