[8.x] Esql - Support date nanos in date extract function (elastic#120727) (elastic#120908)

* Esql - Support date nanos in date extract function (elastic#120727)

Resolves elastic#110000

Add support for running the date extract function on nanosecond dates.

* Fix switch error

* ESQL: Fix DateExtract with nanos tests

---------

Co-authored-by: Iván Cea Fontenla <[email protected]>
Co-authored-by: Iván Cea Fontenla <[email protected]>

Author: not-napoleon

docs/changelog/120727.yaml

@@ -0,0 +1,6 @@
+pr: 120727
+summary: Esql - Support date nanos in date extract function
+area: ES|QL
+type: enhancement
+issues:
+ - 110000

docs/reference/esql/functions/kibana/definition/date_extract.json

@@ -500,6 +500,28 @@ millis:date              | nanos:date_nanos               | num:long
 2023-10-23T12:15:03.360Z | 2023-10-23T12:15:03.360103847Z | 1698063303360103847
 ;
 
+Date nanos date extract
+required_capability: date_nanos_date_extract
+
+FROM date_nanos
+| EVAL nn = MV_MAX(nanos)
+| EVAL year = DATE_EXTRACT("year", nn), ns = DATE_EXTRACT("nano_of_second", nn)
+| KEEP nn, year, ns
+| SORT nn DESC;
+
+nn:date_nanos                  | year:long | ns:long
+2023-10-23T13:55:01.543123456Z | 2023      | 543123456
+2023-10-23T13:53:55.832987654Z | 2023      | 832987654
+2023-10-23T13:52:55.015787878Z | 2023      | 015787878
+2023-10-23T13:51:54.732102837Z | 2023      | 732102837
+2023-10-23T13:33:34.937193000Z | 2023      | 937193000
+2023-10-23T12:27:28.948000000Z | 2023      | 948000000
+2023-10-23T12:15:03.360103847Z | 2023      | 360103847
+2023-10-23T12:15:03.360103847Z | 2023      | 360103847
+2023-03-23T12:15:03.360103847Z | 2023      | 360103847
+2023-03-23T12:15:03.360103847Z | 2023      | 360103847
+;
+
 date nanos to long, index version
 required_capability: to_date_nanos