Introduce pipe support, in particular head and tail
(which can also be chained).
(cherry picked from commit 4521ca3367147d4d6531cf0ab975d8d705f400ea)
(cherry picked from commit d6731d659d012c96b19879d13cfc9e1eaf4745a4)
Removes references to partial results from the async EQL search docs.
If an EQL search does not complete during the `wait_for_completion_timeout`
timeout period, it returns no results.
Notes that you cannot use EQL in ES to search the values of `nested`
fields or their sub-fields. However, indices containing `nested` field
mappings are otherwise supported.
Per #54411, we plan to handle case sensitivity via a parameter for the
EQL search API (with the possible exception of the `between` function).
This removes references and examples related to case sensitivity from
the EQL functions docs.
Adds a concise list of EQL advantages, based on the "EQL Advantages"
section in the [EQL for the masses][0] blog post.
The intent is to inform users how EQL could benefit at a high level.
[0]: https://www.elastic.co/blog/eql-for-the-masses
Co-Authored-By: Ross Wolf <31489089+rw-access@users.noreply.github.com>
Adds a important admonition to the EQL syntax page noting that
the equal (`==`) operator should not be used to match `text` field
values.
Relates to #52709 and #53020
Changes boilerplate sentence of "If using a field as the argument, this
parameter only supports..." to "...this parameter supports only...".
The latter is a bit more clear and readable.
EQL functions are an easy way for users to transform indexed data
at search time. However, using multiple functions can make
queries difficult to write and slows search speeds.
Users can circumvent this by indexing fields containing the transformed
data, but that usually slows index speeds.
This adds a related tip and example covering these tradeoffs.
Adds documentation for the EQL `substring` function.
Supporting changes:
* Creates a new "EQL function reference" page
* Updates the title of the "EQL syntax reference" page for consistency
* Adds a brief "Functions" section to the EQL syntax docs
* Updates EQL limitations docs to state that only array functions are
unsupported
Adds a tip admonition to the basic example in the EQL search docs.
This tip lets users know they can set up a Beat to automatically
index data in ES, rather than manually indexing using the bulk or index
APIs.
Adds documentation for the `any` keyword to the EQL syntax docs.
Includes:
* Definition of an event category and its relationship to the event
category field.
* Example matching all event categories using `any` keyword
* Example using `any` with `where true`
James Rodewig
Costin Leau
Igor Motov
Lisa Cawley