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Posted to derby-dev@db.apache.org by "Rick Hillegas (JIRA)" <ji...@apache.org> on 2014/01/09 17:16:51 UTC
[jira] [Commented] (DERBY-6388) Example WHERE CURRENT OF clause in
Reference Guide is nonsense
[ https://issues.apache.org/jira/browse/DERBY-6388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13866744#comment-13866744 ]
Rick Hillegas commented on DERBY-6388:
--------------------------------------
Sorry for not responding sooner, Kim. DERBY-6388-2.diff looks good to me. +1. Thanks.
> 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
> Fix For: 10.10.1.3, 10.11.0.0
>
> Attachments: DERBY-6388-2.diff, DERBY-6388.diff, rrefsqlj15309.html, 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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