Kurt Young created FLINK-14662:
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Summary: Distinguish unknown table stats and zero
Key: FLINK-14662
URL: https://issues.apache.org/jira/browse/FLINK-14662
Project: Flink
Issue Type: Improvement
Components: Connectors / Hive, Table SQL / API
Reporter: Kurt Young
Currently UNKNOWN table stats is represented with zeros, which might confuse
with KNOWN table stats with exactly 0 row count.
We can use -1 to represent UNKNOWN instead.
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