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From "Kim Haase (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DERBY-6388) Example WHERE CURRENT OF clause in Reference Guide is nonsense
Date Tue, 22 Oct 2013 18:06:45 GMT

     [ https://issues.apache.org/jira/browse/DERBY-6388?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kim Haase updated DERBY-6388:
-----------------------------

    Issue & fix info: Patch Available

> Example WHERE CURRENT OF clause in Reference Guide is nonsense
> --------------------------------------------------------------
>
>                 Key: DERBY-6388
>                 URL: https://issues.apache.org/jira/browse/DERBY-6388
>             Project: Derby
>          Issue Type: Bug
>          Components: Documentation
>    Affects Versions: 10.11.0.0
>            Reporter: Rick Hillegas
>            Assignee: Kim Haase
>         Attachments: DERBY-6388.diff, rrefsqlj15309.html
>
>
> The Reference Guide section titled "WHERE CURRENT OF clause" provides some sample code.
The code doesn't even compile. It has a number of defects:
> 1) Autocommit needs to be turned on.
> 2) The cursor name needs to be ALL CAPS in the s.setCursorName() statement.
> 3) The ResultSet needs to be created from the statement and can't be created directly
from the connection.
> 4) The ResultSet needs to be positioned before the UPDATE is run.
> The following cleaned-up code compiles and runs correctly:
>         conn.setAutoCommit( false );
>         Statement s = conn.createStatement();
>         s.setCursorName("AIRLINESRESULTS");
>         ResultSet rs = s.executeQuery(
>                                          "SELECT Airline, basic_rate " +
>                                          "FROM Airlines FOR UPDATE OF basic_rate");
>         rs.next();
>         Statement s2 = conn.createStatement();
>         s2.executeUpdate("UPDATE Airlines SET basic_rate = basic_rate " +
>                          "+ .25 WHERE CURRENT OF AirlinesResults");



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