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From "Robbie Strickland (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-2079) AsciiType comparator no longer usable on numeric types in 0.7
Date Tue, 01 Feb 2011 14:16:28 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2079?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12989213#comment-12989213
] 

Robbie Strickland commented on CASSANDRA-2079:
----------------------------------------------

I was/am using C#, no high-level client.  I'm doing a big endian conversion on an integer
being used as a supercolumn name.  Previously (in 0.6.x) I would get errors trying to use
the LongType comparator because of size issues, which is why I used AsciiType (same effect
without the size validation).  The IntegerType comparator gives me what I was looking for
in 0.6.x, but I lost a few days trying to figure out what was generating errors (I'm using
AsciiType all over the place, so it wasn't immediately apparent where the root was).  

I understand and agree with the more robust validation and addition of the IntegerType, but
the comment that I should just send valid data is really not accurate since I was using the
only available workaround at the time.  For the benefit of others who are migrating and may
have run into this issue, I think adding something in the documentation regarding the stricter
validation (outside an obscure JIRA issue) would be helpful.  In fact a comprehensive migration
doc would really be great since 0.7 made some fundamental changes.  

> AsciiType comparator no longer usable on numeric types in 0.7
> -------------------------------------------------------------
>
>                 Key: CASSANDRA-2079
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2079
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Documentation & website
>    Affects Versions: 0.7.0
>         Environment: Ubuntu 10
>            Reporter: Robbie Strickland
>             Fix For: 0.7.0
>
>
> Prior to 0.7, if you wanted to use integer values other than long types as column names,
you had to use AsciiType to get a valid numeric-order comparison.  If you migrate to 0.7 you
need to change the comparison type to "IntegerType", otherwise you will get the following
error: InvalidRequestException(Why: Invalid byte for ascii: -51), or something similar.  The
documentation should be updated to warn users of this issue.

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