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From "Sylvain Lebresne (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-5198) Fix CQL3 loose type validation of constants
Date Mon, 04 Feb 2013 09:54:13 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-5198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sylvain Lebresne resolved CASSANDRA-5198.
-----------------------------------------

    Resolution: Fixed
    
> Fix CQL3 loose type validation of constants 
> --------------------------------------------
>
>                 Key: CASSANDRA-5198
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5198
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 1.2.1
>            Reporter: Edward Capriolo
>            Assignee: Sylvain Lebresne
>            Priority: Minor
>             Fix For: 1.2.2
>
>         Attachments: 0001-Respect-CQL3-constant-types.txt, 0002-Improve-printing-of-type-in-error-message.txt,
0003-Respect-partitioner-type-for-Token-function.txt
>
>
> This works as it should.
> {noformat}
> cqlsh:movies> select * from users where token (username) > token('') ;
>  username  | created_date | email | firstname | lastname | password
> -----------+--------------+-------+-----------+----------+----------
>     bsmith |         null |  null |       bob |    smith |     null
>  scapriolo |         null |  null |    stacey | capriolo |     null
>  ecapriolo |         null |  null |    edward | capriolo |     null
> cqlsh:movies> select * from users where token (username) > token('bsmith') ;
>  username  | created_date | email | firstname | lastname | password
> -----------+--------------+-------+-----------+----------+----------
>  scapriolo |         null |  null |    stacey | capriolo |     null
>  ecapriolo |         null |  null |    edward | capriolo |     null
> cqlsh:movies> select * from users where token (username) > token('scapriolo') ;
>  username  | created_date | email | firstname | lastname | password
> -----------+--------------+-------+-----------+----------+----------
>  ecapriolo |         null |  null |    edward | capriolo |     null
> {noformat}
> But look what happens when you supply numbers into the token function.
> {noformat}
> qlsh:movies> select * from users where token (username) > token(0) ;
>  username  | created_date | email | firstname | lastname | password
> -----------+--------------+-------+-----------+----------+----------
>  ecapriolo |         null |  null |    edward | capriolo |     null
> cqlsh:movies> select * from users where token (username) > token(1134314) ;
>  username  | created_date | email | firstname | lastname | password
> -----------+--------------+-------+-----------+----------+----------
>     bsmith |         null |  null |       bob |    smith |     null
>  scapriolo |         null |  null |    stacey | capriolo |     null
>  ecapriolo |         null |  null |    edward | capriolo |     null
> cqlsh:movies> select * from users where token (username) > token(113431431) ;
>  username  | created_date | email | firstname | lastname | password
> -----------+--------------+-------+-----------+----------+----------
>  scapriolo |         null |  null |    stacey | capriolo |     null
>  ecapriolo |         null |  null |    edward | capriolo |     null
> cqlsh:movies> select * from users where token (username) > token(1134) ;
>  username  | created_date | email | firstname | lastname | password
> -----------+--------------+-------+-----------+----------+----------
>  ecapriolo |         null |  null |    edward | capriolo |     null
> cqlsh:movies> select * from users where token (username) > token(1134434) ;
>  username  | created_date | email | firstname | lastname | password
> -----------+--------------+-------+-----------+----------+----------
>  scapriolo |         null |  null |    stacey | capriolo |     null
> {noformat}
> This does not make sense to me. The token function is apparently converting integers
to strings leading to seemingly unpredictable results. 
> However I find this syntax odd, I feel like I should be able to say 
> 'token(username) > 0 and token(username) < 10' because from a thrift side I can
page tokens or I can page keys. In this case, I guess, I am only able to page keys because
the token is not returned to the user.
> Is token 0 = ''? How do I arrive at the minimal token for and int column. 
> Should the token() function at least be smart enough to reject integers for string columns?

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