Vladimir Sitnikov created CALCITE-499:
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Summary: Estimate number of rows in ReflectiveSchema
Key: CALCITE-499
URL: https://issues.apache.org/jira/browse/CALCITE-499
Project: Calcite
Issue Type: Bug
Affects Versions: 1.0.0-incubating
Reporter: Vladimir Sitnikov
Assignee: Julian Hyde
It would be nice if {{ReflectiveSchema}} could provide row estimates.
For arrays it is zero cost ({{Array.getLength(...)}}.
For collections the invocation of {{.size()}} might be slow, however I am fine
with both ways: return unknown or execute {{.size()}}.
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