@@ -5424,6 +5424,8 @@ pub enum Statement {
     CreateAlert {
         /// `OR REPLACE` flag.
         or_replace: bool,
+        /// `OR ALTER` flag.
+        or_alter: bool,
         /// `IF NOT EXISTS` flag.
         if_not_exists: bool,
         /// Alert name.
@@ -9184,6 +9186,7 @@ impl fmt::Display for Statement {
             ),
             Statement::CreateAlert {
                 or_replace,
+                or_alter,
                 if_not_exists,
                 name,
                 warehouse,
@@ -9197,8 +9200,9 @@ impl fmt::Display for Statement {
             } => {
                 write!(
                     f,
-                    "CREATE {or_replace}ALERT {if_not_exists}{name}",
+                    "CREATE {or_replace}{or_alter}ALERT {if_not_exists}{name}",
                     or_replace = if *or_replace { "OR REPLACE " } else { "" },
+                    or_alter = if *or_alter { "OR ALTER " } else { "" },
                     if_not_exists = if *if_not_exists { "IF NOT EXISTS " } else { "" },
                 )?;
                 if let Some(wh) = warehouse {
 
@@ -5906,7 +5906,7 @@ impl<'a> Parser<'a> {
         } else if self.parse_keyword(Keyword::TASK) {
             self.parse_create_task(or_replace, or_alter)
         } else if self.parse_keyword(Keyword::ALERT) {
-            self.parse_create_alert(or_replace)
+            self.parse_create_alert(or_replace, or_alter)
         } else if self.parse_keywords(&[Keyword::SECURE, Keyword::PROCEDURE]) {
             self.parse_create_procedure(or_alter, or_replace, temporary, true)
         } else if self.parse_keyword(Keyword::PROCEDURE) {
@@ -6490,7 +6490,11 @@ impl<'a> Parser<'a> {
     /// [WAREHOUSE = <wh>] [SCHEDULE = '<sched>'] [COMMENT = '<c>'] [RUNBOOK = '<r>']
     /// [SUSPEND_ALERT_AFTER_NUM_FAILURES = <n>] IF (EXISTS (<condition>)) THEN
     /// <action>` statement.
-    fn parse_create_alert(&mut self, or_replace: bool) -> Result<Statement, ParserError> {
+    fn parse_create_alert(
+        &mut self,
+        or_replace: bool,
+        or_alter: bool,
+    ) -> Result<Statement, ParserError> {
         let if_not_exists = self.parse_keywords(&[Keyword::IF, Keyword::NOT, Keyword::EXISTS]);
         let name = self.parse_object_name(false)?;
         if self.parse_keyword(Keyword::CLONE) {
@@ -6556,6 +6560,7 @@ impl<'a> Parser<'a> {
 
         Ok(Statement::CreateAlert {
             or_replace,
+            or_alter,
             if_not_exists,
             name,
             warehouse,