[Refactor] Chop too large hyperscan regex pattern when logging it on …

…an error (StarRocks#52467) Signed-off-by: satanson <[email protected]> Signed-off-by: zhiminr.ren <[email protected]>
renzhimin7 · Nov 7, 2024 · 355f99a · 355f99a
1 parent 5463c39
commit 355f99a
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/be/src/exprs/like_predicate.cpp b/be/src/exprs/like_predicate.cpp
@@ -49,7 +49,9 @@ bool LikePredicate::hs_compile_and_alloc_scratch(const std::string& pattern, Lik
     if (hs_compile(pattern.c_str(), HS_FLAG_ALLOWEMPTY | HS_FLAG_DOTALL | HS_FLAG_UTF8 | HS_FLAG_SINGLEMATCH,
                    HS_MODE_BLOCK, nullptr, &state->database, &state->compile_err) != HS_SUCCESS) {
         std::stringstream error;
-        error << "Invalid hyperscan expression: " << std::string(slice.data, slice.size) << ": "
+        auto chopped_size = std::min<size_t>(slice.size, 64);
+        auto ellipsis = (chopped_size < slice.size) ? "..." : "";
+        error << "Invalid hyperscan expression: " << std::string(slice.data, chopped_size) << ellipsis << ": "
               << state->compile_err->message << PROMPT_INFO;
         LOG(WARNING) << error.str().c_str();
         hs_free_compile_error(state->compile_err);