[ES|QL] Add MATCH_PHRASE

[kderusso]

Adds MATCH_PHRASE support to ES|QL.

Some examples of how to use MATCH_PHRASE:

POST _query?format=txt
{
  "query": """
  FROM books METADATA _score
  | WHERE MATCH_PHRASE(title, "return of the king")
  | KEEP title, _score
  | SORT _score
  | LIMIT 5
  """
}

POST _query?format=txt
{
  "query": """
  FROM books METADATA _score
  | WHERE MATCH_PHRASE(title, "return of king", {"slop": 5})
  | KEEP title, _score
  | SORT _score
  | LIMIT 5
  """
}

POST _query?format=txt
{
  "query": """
  FROM books METADATA _score
  | WHERE MATCH_PHRASE(title, "return of king", {"analyzer": "whitespace"})
  | KEEP title, _score
  | SORT _score
  | LIMIT 5
  """
}

POST _query?format=txt
{
  "query": """
  FROM books METADATA _score
  | WHERE MATCH_PHRASE(title, "", {"zero_terms_query": "all"})
  | KEEP title, _score
  | SORT _score
  | LIMIT 5
  """
}

[elasticsearchmachine]

Hi @kderusso, I've created a changelog YAML for you.

[carlosdelest]

It's important that we register the match_phrase as snapshot and get some tests ready for release builds.

Besides that, some small nits.

[carlosdelest]

Hopefully those errors get corrected when registering the function under snapshot functions 🤞

[carlosdelest]

I think you'll need to add match_phrase capability to these tests, otherwise they will fail for release as the function will not be registered

[ioanatia]

@elasticmachine test this please

[ioanatia]

I checked the release tests failures - there is nothing pertaining to match_phrase - I removed the test-release label since all the match_phrase failures for release tests were fixed.

[carlosdelest]

LGTM, great work! 💯

There are other tests that can be added to VerifierTests - look for EsqlCapabilities.Cap.MULTI_MATCH_FUNCTION.isEnabled() and you'll be able to add an equivalent one for match_phrase

[elasticsearchmachine]

💔 Backport failed

Status	Branch	Result
❌	8.19	Commit could not be cherrypicked due to conflicts

You can use sqren/backport to manually backport by running backport --upstream elastic/elasticsearch --pr 127661

[kderusso]

💚 All backports created successfully

Status	Branch	Result
✅	8.19

Questions ?

Please refer to the Backport tool documentation

[kderusso]

Backport PR: #129215