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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6443) ArrayIndexOutOfBoundsException when calling function from trigger
Date Thu, 09 Jan 2014 14:18:53 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13866670#comment-13866670
] 

ASF subversion and git services commented on DERBY-6443:
--------------------------------------------------------

Commit 1556809 from [~knutanders] in branch 'code/trunk'
[ https://svn.apache.org/r1556809 ]

DERBY-6443: ArrayIndexOutOfBoundsException when calling function from trigger

StaticMethodCallNode.bindExpression() was a no-op if the node had
already been bound. This caused problems for queries that need to bind
expressions multiple times (for example INSERT INTO ... SELECT).

This fix makes StaticMethodCallNode.bindExpression() work if it's
called a second time, while still making it a no-op if it is called
recursively in order to prevent infinite recursion.

> ArrayIndexOutOfBoundsException when calling function from trigger
> -----------------------------------------------------------------
>
>                 Key: DERBY-6443
>                 URL: https://issues.apache.org/jira/browse/DERBY-6443
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.0.2.1, 10.10.1.1
>            Reporter: Tim Dudgeon
>            Assignee: Knut Anders Hatlen
>         Attachments: d6443-1a.diff
>
>
> I'm having problems will calling functions from within a trigger.
> The problem seems to be with the outer function call (FLOOR() in this case, but it also
happens with other functions). It works fine in the SELECT statement, but when used in the
trigger it throws a ArrayIndexOutOfBoundsException.
> Remove the FLOOR() part from the trigger and it works fine.
> {code}
> -- create source table and some data
> CREATE TABLE foo (name VARCHAR(20), val DOUBLE);
> INSERT INTO foo (name, val) VALUES ('A', 10), ('A', 20), ('B', 30), ('C', 40);
> -- calling the function works fine here
> SELECT name, FLOOR(AVG(LOG10(val))), COUNT(*)
> FROM foo
> GROUP BY name;
> -- create target table for trigger
> CREATE TABLE summary (name VARCHAR(20), aver DOUBLE, size INT);
> -- create the trigger
> CREATE TRIGGER trg_foo AFTER INSERT ON foo
> REFERENCING NEW TABLE AS changed FOR EACH STATEMENT MODE DB2SQL
> INSERT INTO summary (name, aver, size)
> SELECT name, FLOOR(AVG(LOG10(val))), COUNT(*)
> FROM changed
> GROUP BY name;
> -- insert rows to cause trigger to fire
> INSERT INTO foo (name, val) VALUES ('A', 10), ('A', 20), ('B', 30), ('C', 40);
> SELECT * FROM foo;
> SELECT * FROM summary;
> {code}



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