fix: like panic due to Chinese (#12155)

src/query/sql/src/planner/semantic/type_check.rs

@@ -3214,16 +3214,24 @@ fn check_prefix(like_str: &str) -> bool {
 
     let mut i: usize = like_str.len();
     while i > 0 {
-        if like_str.chars().nth(i - 1).unwrap() != '%' {
-            break;
+        if let Some(c) = like_str.chars().nth(i - 1) {
+            if c != '%' {
+                break;
+            }
+        } else {
+            return false;
         }
         i -= 1;
     }
     if i == like_str.len() {
         return false;
     }
     for j in (0..i).rev() {
-        if like_str.chars().nth(j).unwrap() == '_' {
+        if let Some(c) = like_str.chars().nth(j) {
+            if c == '_' {
+                return false;
+            }
+        } else {
             return false;
         }
     }

tests/sqllogictests/suites/base/20+_others/20_0010_expression_string_like

@@ -137,3 +137,18 @@ query B
 select count(*)=5 from t_string_like where URL like '%%'
 ----
 1
+
+# issue https://github.com/datafuselabs/databend/issues/12154
+statement ok
+create table b01(card_no int, deal_type varchar);
+
+statement ok
+insert into b01 values(1000,'地铁入站');
+
+query IT
+select * from b01 where deal_type  like '地铁%';
+----
+1000  地铁入站
+
+statement ok
+drop table b01;