github-actions[bot] commented on code in PR #19089:
URL: https://github.com/apache/doris/pull/19089#discussion_r1177321869


##########
be/src/vec/functions/functions_multi_string_search.cpp:
##########
@@ -278,13 +286,18 @@ struct FunctionMultiMatchAnyImpl {
 
             /// zero the result, scan, check, update the offset.
             res[i] = 0;
-            err = hs_scan(
-                    regexps->getDB(),
-                    reinterpret_cast<const char*>(haystack_data.data()) + 
prev_haystack_offset,
-                    static_cast<unsigned>(cur_haystack_length), 0, 
smart_scratch.get(), on_match,
-                    &res[i]);
-            if (err != HS_SUCCESS && err != HS_SCAN_TERMINATED)
-                return Status::InternalError("failed to scan with vectorscan");
+            if (cur_haystack_length == 0) {
+                null_map[i] = 1;
+            } else {
+                err = hs_scan(
+                        regexps->getDB(),
+                        reinterpret_cast<const char *>(haystack_data.data()) + 
prev_haystack_offset,
+                        static_cast<unsigned>(cur_haystack_length), 0, 
smart_scratch.get(), on_match,
+                        &res[i]);
+                if (err != HS_SUCCESS && err != HS_SCAN_TERMINATED) {
+                    return Status::InternalError("failed to scan with 
vectorscan");

Review Comment:
   warning: statement should be inside braces 
[readability-braces-around-statements]
   
   ```suggestion
                   if (err != HS_SUCCESS && err != HS_SCAN_TERMINATED) {
                       return Status::InternalError("failed to scan with 
vectorscan");
   }
   ```
   



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