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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DERBY-672) Re-enable user defined aggregates
Date Fri, 19 Oct 2012 15:12:11 GMT

     [ https://issues.apache.org/jira/browse/DERBY-672?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rick Hillegas updated DERBY-672:
--------------------------------

    Attachment: derby-672-18-aa-udaInJar.diff

Attaching derby-672-18-aa-udaInJar.diff. This patch adds support for running user-defined
aggregates from jar files stored in the database. I am running regression tests now.


Touches the following files:

-----------

M       java/engine/org/apache/derby/impl/sql/compile/UserAggregateDefinition.java

Fault-in Aggregator before faulting-in the user-supplied class. I don't think this is necessary
but it looks cleaner.

-----------

M       java/engine/org/apache/derby/impl/services/reflect/JarLoader.java

Add the Aggregator package to the list of Derby packages which the database class loader is
willing to load.

-----------

M       java/testing/org/apache/derbyTesting/functionTests/tests/lang/DatabaseClassLoadingTest.java
A       java/testing/org/apache/derbyTesting/functionTests/tests/lang/median_uda.jar

Test for this functionality. The jar file holds a Median aggregator. A new test case in DatabaseClassLoadingTest
installs the jar, wires it into the database class path, and then invokes the aggregate inside.

                
> Re-enable user defined aggregates
> ---------------------------------
>
>                 Key: DERBY-672
>                 URL: https://issues.apache.org/jira/browse/DERBY-672
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Rick Hillegas
>            Assignee: Rick Hillegas
>         Attachments: derby-672-01-aa-ddl.diff, derby-672-02-ac-nonDistinct.diff, derby-672-03-aa-distinct.diff,
derby-672-03-ab-distinct.diff, derby-672-04-aa-fixJSR169test.diff, derby-672-05-aa-java7testOrderProblem.diff,
derby-672-06-aa-grantRevoke.diff, derby-672-07-aa-fixJSR169again.diff, derby-672-08-aa-fixJSR169yetAgain.diff,
derby-672-09-ab-udtAggregates.diff, derby-672-10-af-typeBounds.diff, derby-672-11-aa-tests.diff,
derby-672-11-ab-tests.diff, derby-672-12-aa-implicitCasts.diff, derby-672-13-aa-differentReturnType.diff,
derby-672-14-aa-collations.diff, derby-672-15-aa-setCollation.diff, derby-672-16-aa-forbidInGroupBy.diff,
derby-672-17-aa-moreTests.diff, derby-672-18-aa-udaInJar.diff, UserDefinedAggregates.html,
UserDefinedAggregates.html, UserDefinedAggregates.html
>
>
> Nicolas Dufour in an email thread titled "functions and list" started on November 2,
2005 requests the ability to create user defined aggregates.
> This functionality used to be in Cloudscape. It was disabled presumably because it was
considered non-standard. However, most of the machinery needed for this feature is still in
the code. We should re-enable user defined aggregates after we agree on acceptable syntax.

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