You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@calcite.apache.org by "Vladimir Sitnikov (JIRA)" <ji...@apache.org> on 2014/12/01 08:00:17 UTC

[jira] [Created] (CALCITE-499) Estimate number of rows in ReflectiveSchema

Vladimir Sitnikov created CALCITE-499:
-----------------------------------------

             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()}}.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)