chaoyli opened a new pull request #3242: Fix bug of memory limit when group by varchar columns. URL: https://github.com/apache/incubator-doris/pull/3242 select date_format(k10, '%Y%m%d') as myk10 from baseall group by myk10; The date_format function in query above will be stored in MemPool during the query execution. If the query handles millions of rows, it will consume much memory. Should clear the MemPool at interval.
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