Julian Hyde created CALCITE-1635:
------------------------------------
Summary: Add MinRowCount metadata
Key: CALCITE-1635
URL: https://issues.apache.org/jira/browse/CALCITE-1635
Project: Calcite
Issue Type: Bug
Reporter: Julian Hyde
Assignee: Julian Hyde
Add {{MinRowCount}} metadata, that describes that a {{RelNode}} will never
return fewer than N rows.
The {{GROUP BY ()}} operation has a peculiar effect if its input is empty: it
increases the number of rows to 1. So, it is useful to know that a {{RelNode}}
can never be empty, and a {{MinRowCount}} of 1 or higher communicates that.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
