morningman commented on a change in pull request #3947:
URL: https://github.com/apache/incubator-doris/pull/3947#discussion_r446279706



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File path: be/src/runtime/datetime_value.cpp
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@@ -1535,7 +1521,10 @@ bool DateTimeValue::unix_timestamp(int64_t* timestamp, 
const std::string& timezo
     if (!find_cctz_time_zone(timezone, ctz)) {

Review comment:
       It needs a thread safe cache.
   Since there is not much calls of `find_cctz_time_zone()`, I think we can 
improve it later.




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