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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2015/02/26 20:43:06 UTC
[jira] [Resolved] (CALCITE-603) Metadata providers for size,
memory, parallelism
[ https://issues.apache.org/jira/browse/CALCITE-603?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Julian Hyde resolved CALCITE-603.
---------------------------------
Resolution: Fixed
Fix Version/s: 1.1.0-incubating
Fixed in http://git-wip-us.apache.org/repos/asf/incubator-calcite/commit/dacde8f2.
> Metadata providers for size, memory, parallelism
> ------------------------------------------------
>
> Key: CALCITE-603
> URL: https://issues.apache.org/jira/browse/CALCITE-603
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Fix For: 1.1.0-incubating
>
>
> 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. (See [email thread|http://mail-archives.apache.org/mod_mbox/incubator-calcite-dev/201502.mbox/%3CCAMCtme%2BST-pxDT3pYyvrV4RmONYQR2_BguZY5TOMMccAH8DeCw%40mail.gmail.com%3E].)
> I think this should be a single interface with two methods: {code}interface Volume {
> List<Double> averageColumnSize();
> Double averageRowSize();
> }{code}
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