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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2015/02/23 23:16:12 UTC

[jira] [Created] (CALCITE-603) Metadata provider for average row size and column size

Julian Hyde created CALCITE-603:
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             Summary: Metadata provider for average row size and column size
                 Key: CALCITE-603
                 URL: https://issues.apache.org/jira/browse/CALCITE-603
             Project: Calcite
          Issue Type: Bug
            Reporter: Julian Hyde
            Assignee: Julian Hyde


Add a metadata provider for average row size and column size (both in bytes).

This can be used, among other things, to determine the degree of parallelism and whether there is adequate memory to put multiple operators in the same process.

I think this should be a single interface with two methods: {code}interface Volume {
  List<Double> averageColumnSize();
  Double averageRowSize();
}{code}



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