From 59342128a904c688a6f3302484644f0e1eef4da8 Mon Sep 17 00:00:00 2001
From: discord9 <discord9@163.com>
Date: Mon, 26 Aug 2024 14:40:05 +0800
Subject: [PATCH] fix: report error when not literal

---
 src/flow/src/expr/func.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/flow/src/expr/func.rs b/src/flow/src/expr/func.rs
index 7307668f6b4d..454cf5e70081 100644
--- a/src/flow/src/expr/func.rs
+++ b/src/flow/src/expr/func.rs
@@ -352,6 +352,8 @@ impl UnaryFunc {
                             }.fail()?
                     }
                 };
+
+                // start time argument is optional
                 let start_time = match args.get(2) {
                     Some(start_time) => {
                         if let Some(value) = start_time.expr.as_literal() {
@@ -367,7 +369,10 @@ impl UnaryFunc {
                                 })?;
                             Some(ret)
                         } else {
-                            None
+                            UnexpectedSnafu {
+                                reason: "Expect start time arg to be literal",
+                            }
+                            .fail()?
                         }
                     }
                     None => None,