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From "Sylvain Lebresne (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6538) Provide a read-time CQL function to display the data size of columns and rows
Date Mon, 23 Feb 2015 16:42:12 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14333484#comment-14333484
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Sylvain Lebresne commented on CASSANDRA-6538:
---------------------------------------------

You're right, I forgot that we got that as part of CASSANDRA-6766 and did made the blob type
accept anything. In hindisght, I'm not sure this was the best of idea (and it is somewhat
inconcistent with how drivers deals with blob), but I guess it's too late now. And in any
case, it's not really something that is in scope for this ticket. And that's my main point:
we shouldn't special case any part of the code every time we add a new function or we'll end
up with inconsistent behavior all over the place.

But as a side note, your changes to {{Selection}} makes even less sense in this light, they
are basically a no-op since you're just inlining the BytesType {{isValueCompatible}} body.

Anyway, since we do accept everything for a blob, then I suggest we just let it be that way.
That is, let's just remove the {{Selection}} changes from your patch, fix the use of {{ByteBuffer.array().length}}
and rename the method to {{byteSizeOf}} ({{sizeOf}} is just too generic a name imo, people
will be confused that applied to a collection this doesn't return the number of elements of
the collection).


> Provide a read-time CQL function to display the data size of columns and rows
> -----------------------------------------------------------------------------
>
>                 Key: CASSANDRA-6538
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6538
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Johnny Miller
>            Priority: Minor
>              Labels: cql
>         Attachments: 6538.patch, CodeSnippet.txt, sizeFzt.PNG
>
>
> It would be extremely useful to be able to work out the size of rows and columns via
CQL. 



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