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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2015/02/23 23:52:12 UTC
[jira] [Updated] (CALCITE-603) Metadata provider for average row
size and column size
[ https://issues.apache.org/jira/browse/CALCITE-603?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Julian Hyde updated CALCITE-603:
--------------------------------
Description:
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}
was:
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}
> 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. (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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