elastic · not-napoleon · Jan 15, 2025 · Jan 14, 2025 · Jan 14, 2025 · Jan 14, 2025
diff --git a/docs/changelog/120143.yaml b/docs/changelog/120143.yaml
@@ -0,0 +1,6 @@
+pr: 120143
+summary: Esql - support date nanos in date format function
+area: ES|QL
+type: enhancement
+issues:
+ - 109994
diff --git a/docs/reference/esql/functions/kibana/definition/date_format.json b/docs/reference/esql/functions/kibana/definition/date_format.json
diff --git a/docs/reference/esql/functions/kibana/definition/match_operator.json b/docs/reference/esql/functions/kibana/definition/match_operator.json
diff --git a/docs/reference/esql/functions/kibana/docs/match_operator.md b/docs/reference/esql/functions/kibana/docs/match_operator.md
diff --git a/docs/reference/esql/functions/types/date_format.asciidoc b/docs/reference/esql/functions/types/date_format.asciidoc
diff --git a/x-pack/plugin/esql/qa/testFixtures/src/main/resources/date_nanos.csv-spec b/x-pack/plugin/esql/qa/testFixtures/src/main/resources/date_nanos.csv-spec
@@ -1226,3 +1226,25 @@ FROM date_nanos
 millis:date              | nanos:date_nanos               | num:long
 2023-10-23T12:27:28.948Z | 2023-10-23T12:27:28.948000000Z | 1698064048948000000
 ;
+
+Date Nanos Format
+required_capability: date_nanos_date_format
+
+FROM date_nanos
+| EVAL sv_nanos = MV_MAX(nanos)
+| EVAL a = DATE_FORMAT(sv_nanos), b = DATE_FORMAT("yyyy-MM-dd", sv_nanos), c = DATE_FORMAT("strict_date_optional_time_nanos", sv_nanos)
+| KEEP sv_nanos, a, b, c;
+ignoreOrder:true
+
+sv_nanos:date_nanos               | a:keyword             | b:keyword  | c:keyword
+2023-10-23T13:55:01.543123456Z | 2023-10-23T13:55:01.543Z | 2023-10-23 | 2023-10-23T13:55:01.543123456Z
+2023-10-23T13:53:55.832987654Z | 2023-10-23T13:53:55.832Z | 2023-10-23 | 2023-10-23T13:53:55.832987654Z
+2023-10-23T13:52:55.015787878Z | 2023-10-23T13:52:55.015Z | 2023-10-23 | 2023-10-23T13:52:55.015787878Z
+2023-10-23T13:51:54.732102837Z | 2023-10-23T13:51:54.732Z | 2023-10-23 | 2023-10-23T13:51:54.732102837Z
+2023-10-23T13:33:34.937193000Z | 2023-10-23T13:33:34.937Z | 2023-10-23 | 2023-10-23T13:33:34.937193Z
+2023-10-23T12:27:28.948000000Z | 2023-10-23T12:27:28.948Z | 2023-10-23 | 2023-10-23T12:27:28.948Z
+2023-10-23T12:15:03.360103847Z | 2023-10-23T12:15:03.360Z | 2023-10-23 | 2023-10-23T12:15:03.360103847Z
+2023-10-23T12:15:03.360103847Z | 2023-10-23T12:15:03.360Z | 2023-10-23 | 2023-10-23T12:15:03.360103847Z
+2023-03-23T12:15:03.360103847Z | 2023-03-23T12:15:03.360Z | 2023-03-23 | 2023-03-23T12:15:03.360103847Z
+2023-03-23T12:15:03.360103847Z | 2023-03-23T12:15:03.360Z | 2023-03-23 | 2023-03-23T12:15:03.360103847Z
+;
diff --git a/...csearch/xpack/esql/expression/function/scalar/date/DateFormatMillisConstantEvaluator.java b/...csearch/xpack/esql/expression/function/scalar/date/DateFormatMillisConstantEvaluator.java