zjuwangg commented on issue #10380: [FLINK-14662]Distinguish unknown CatalogTableStatistics and zero URL: https://github.com/apache/flink/pull/10380#issuecomment-560966382 > IIRC, Hive table's `unknown` (the initial default value of a number stats) is 0. To make this change, we need to distinguish Hive table v.s. Flink table. It's not. Hive table's `unknown` stats are none(corresponding stats item is not present in hive table properties). So this pr we aim to distinguish the 0 value and UNKNOW.
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