Wang Yanlin created CALCITE-3473:
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Summary: Unique keys of table scan should contain key column(s)
Key: CALCITE-3473
URL: https://issues.apache.org/jira/browse/CALCITE-3473
Project: Calcite
Issue Type: Improvement
Reporter: Wang Yanlin
Currently, *mq.getUniqueKeys()* for *TableScan* returns empty.
However, for table with key column(s) defined, we can refer uniqueness on key
column(s), so the result should contain key column(s)
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