Home
Extending HCL OneDB™Beyond standard relational database objects, HCL OneDB™ can be extended to handle specialized data types, access methods, routines, and other objects. HCL OneDB™ includes many built-in extensions that are fully integrated in the database server. HCL OneDB™ also provides DataBlade® modules, which are packages of extended database objects for a particular purpose and that are installed separately from the database server. Alternatively, you can create your own user-defined objects for HCL OneDB™.
HCL OneDB™ extensions and DataBlade® modulesThese topics describe how to use built-in database extensions and separately installed DataBlade® modules.
Database Extensions User's GuideThe HCL OneDB™ Database Extensions User's Guide explains how to use the database extensions that come with HCL OneDB™: Large Object Locator, MQ messaging, binary data types, basic text search, node data type, HCL OneDB™ web feature service for Geospatial Data, and SQL packages.
MQ Messaging (WMQ) messaging products provide an infrastructure for distributed, asynchronous communication of data in a distributed, heterogeneous environment. The WMQ message queue allows you to easily exchange information across platforms.
About MQ messagingYou can use either functions or tables to communicate between a database server application and the queue.
VerificationAfter completely the necessary configuration, verify that MQ messaging is working correctly.
Publish and subscribe to a queuePublishing and subscribing to a queue is an effective way of exchanging information between multiple users.
Unsubscribe from a queueTo unsubscribe from a queue, use the MQUnsubscribe() function.

Unsubscribe from a queue

To unsubscribe from a queue, use the MQUnsubscribe() function.

For example, specify:

BEGIN WORK;

EXECUTE FUNCTION MQUnsubscribe('AMT.SAMPLE.SUBSCRIBER', 'AMT.SAMPLE.PUB.SUB.POLICY', 
'Weather');(

expression)           1

1 row(s) retrieved.
   Topic: MQ/TIMESERIES.QUEUE.MANAGER             /StreamSupport
   Topic: MQ/S/TIMESERIES.QUEUE.MANAGER           /Subscribers/Identities/*
   Topic: MQ/S/TIMESERIES.QUEUE.MANAGER           /Subscribers/Identities/*
   Topic: MQ/S/TIMESERIES.QUEUE.MANAGER           /Subscribers/Identities/*

COMMIT WORK;