From bf8f7b04c8caecc65b790be224d76c652bb7609a Mon Sep 17 00:00:00 2001
From: Michael Xu <xzhseh@gmail.com>
Date: Thu, 14 Sep 2023 22:29:59 -0400
Subject: [PATCH] tiny fix

---
 src/expr/src/vector_op/regexp.rs | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/src/expr/src/vector_op/regexp.rs b/src/expr/src/vector_op/regexp.rs
index 32103ee24e0c1..1d83a895e1b0c 100644
--- a/src/expr/src/vector_op/regexp.rs
+++ b/src/expr/src/vector_op/regexp.rs
@@ -33,15 +33,10 @@ impl RegexpContext {
     fn new(pattern: &str, flags: &str, replacement: &str) -> Result<Self> {
         let options = RegexpOptions::from_str(flags)?;
 
-        // FIXME: Any better solution?
-        let mut origin = String::with_capacity(pattern.len());
-
-        if options.case_insensitive {
-            origin.push_str("(?i:");
-            origin.push_str(pattern);
-            origin.push(')');
+        let origin = if options.case_insensitive {
+            format!("(?i:{})", pattern)
         } else {
-            origin = pattern.to_string();
+            pattern.to_string()
         };
 
         Ok(Self {