From cf8c5eb7ba046db52fff9413cf0bc03309af92a7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hilmar=20G=C3=BAstafsson?= <LiHRaM@users.noreply.github.com>
Date: Mon, 17 Nov 2025 11:21:51 +0100
Subject: [PATCH] feat: support functions on `interval` when used as identifier

---
 src/parser/mod.rs         | 3 ++-
 tests/sqlparser_common.rs | 7 +++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index 0b4d8efe5..589336cdc 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -845,7 +845,8 @@ impl<'a> Parser<'a> {
                 Keyword::TRIM => self.parse_trim_expr(),
                 Keyword::INTERVAL
                     if self.peek_token().token != Token::Period
-                        && self.peek_token().token != Token::Comma =>
+                        && self.peek_token().token != Token::Comma
+                        && self.peek_token().token != Token::RParen =>
                 {
                     self.parse_interval()
                 }
diff --git a/tests/sqlparser_common.rs b/tests/sqlparser_common.rs
index 5e01405ae..c42d18236 100644
--- a/tests/sqlparser_common.rs
+++ b/tests/sqlparser_common.rs
@@ -8683,3 +8683,10 @@ WITH (
 
     generic().parse_sql_statements(sql).unwrap();
 }
+
+#[test]
+fn interval_identifier() {
+    generic()
+        .parse_sql_statements("SELECT min(interval) as min_interval FROM table1")
+        .unwrap();
+}