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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2019/12/05 11:36:56 UTC

[GitHub] [flink] lirui-apache commented on issue #10380: [FLINK-14662]Distinguish unknown CatalogTableStatistics and zero

lirui-apache commented on issue #10380: [FLINK-14662]Distinguish unknown CatalogTableStatistics and zero
URL: https://github.com/apache/flink/pull/10380#issuecomment-562092565
 
 
   A related note is: Hive's `StatsOptimizer` can answer queries like `count(*)` by simply returning the stats stored in HMS. And it seems `StatsOptimizer` checks `COLUMN_STATS_ACCURATE ` to decide whether the stats are reliable. So we probably don't have to treat 0 as UNKNOWN if this flag is present.

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