ly923976094 commented on issue #3626: timezone problem URL: https://github.com/apache/incubator-pinot/issues/3626#issuecomment-450602555 > Thanks for sharing the information. From the second result it seems the query selects 1.2B records, which means too much computation needs to happen. Do you really need to store the data in milliseconds granularity? If not, preaggregating offline data after with larger granularity will reduce data size, and hence the the num records to process. May I ask which company/organization is this use case for? I work in sina weibo (Beijing), and my main work is the big data r&d engineer. The data of this table has been pre-aggregated for days outside, and the time stamp of day milliseconds is stored in pinot. In fact, if the time is not converted using SIMPLE_DATE_FORMAT, the query time is very fast (that is, the time zone cannot be specified, resulting in the mismatch between time and real time)，SIMPLE_DATE_FORMAT converts each piece of data rather than the query result
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