mrhhsg commented on code in PR #14616:
URL: https://github.com/apache/doris/pull/14616#discussion_r1034357193


##########
be/src/vec/functions/function_convert_tz.h:
##########
@@ -47,6 +51,10 @@ struct ConvertTZImpl {
                         const ColumnString* from_tz_column, const 
ColumnString* to_tz_column,
                         ReturnColumnType* result_column, NullMap& 
result_null_map,
                         size_t input_rows_count) {
+        auto convert_ctx = reinterpret_cast<ConvertTzCtx*>(
+                
context->get_function_state(FunctionContext::FunctionStateScope::THREAD_LOCAL));
+        std::map<StringRef, cctz::time_zone> time_zone_cache_;

Review Comment:
   `time_zone_cache_` is a temporary map.
   `time_zone_cache` is a reference to the map.



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