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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-672) Re-enable user defined aggregates
Date Tue, 23 Oct 2012 15:15:13 GMT

    [ https://issues.apache.org/jira/browse/DERBY-672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13482394#comment-13482394

Rick Hillegas commented on DERBY-672:

Hi Kim,

Yes. You can't create a schema which begins with SYS so you can't create any objects in such
a schema:

ij version 10.10
ij> connect 'jdbc:derby:memory:db;create=true';
ij> create schema sysmine;
ERROR 42939: An object cannot be created with the schema name 'SYSMINE'.
ij> create derby aggregate sys.foo for int
external name 'org.apache.derbyTesting.functionTests.tests.lang.GenericMode';
ERROR 42X62: 'CREATE DERBY AGGREGATE' is not allowed in the 'SYS' schema.
ij> create derby aggregate sysmine.foo for int
external name 'org.apache.derbyTesting.functionTests.tests.lang.GenericMode';
ERROR 42X62: 'CREATE DERBY AGGREGATE' is not allowed in the 'SYSMINE' schema.

> 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: d672-no-exceptions.diff, 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,
derby-672-19-aa-precisionChecks.diff, derby-672-20-aa-exactBounds.diff, derby-672-21-aa-typeDependencies.diff,
UserDefinedAggregates.html, 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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