xuefuz commented on issue #10380: [FLINK-14662]Distinguish unknown CatalogTableStatistics and zero URL: https://github.com/apache/flink/pull/10380#issuecomment-561965460 @zjuwangg Here is the comment for this meaning of the property: > //This string constant will be persisted in metastore to indicate whether corresponding > //table or partition's statistics and table or partition's column statistics are accurate or not. This just mean whether the stats are accurate (up to date). It doesn't mean wheter the stats exists or not. (If the property is set, it probably means the stats exists.) I agree with @KurtYoung that it's probably more protective to treat 0 as unknown for Hive tables. For Flink tables, it's okay to treat -1 as unknown only. (Hive doesn't use these tables anyway.)
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