elastic
diff --git a/‎x-pack/plugin/esql/src/main/antlr/parser/Expression.g4
Lines changed: 2 additions & 0 deletions b/‎x-pack/plugin/esql/src/main/antlr/parser/Expression.g4
Lines changed: 2 additions & 0 deletions
@@ -54,6 +54,8 @@ functionExpression
 
 functionName
     : identifierOrParameter
+    | FIRST
+    | LAST
     ;
 
 mapExpression
Original file line number	Diff line number	Diff line change
`@@ -54,6 +54,8 @@ functionExpression`
`54`	`54`
`55`	`55`	`functionName`
`56`	`56`	`: identifierOrParameter`
	`57`	`+ \| FIRST`
	`58`	`+ \| LAST`
`57`	`59`	`;`
`58`	`60`
`59`	`61`	`mapExpression`