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Oracle® Streams Advanced Queuing User's Guide
11g Release 2 (11.2)

E11013-08
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9 Oracle Streams Advanced Queuing & Messaging Gateway Views

This chapter describes the Oracle Streams Advanced Queuing (AQ) administrative interface views and Oracle Messaging Gateway (MGW) views.

Note:

All views not detailed in this chapter are described in the Oracle Database Reference.

This chapter contains these topics:

Oracle AQ Views

Oracle Messaging Gateway Views

DBA_QUEUE_TABLES: All Queue Tables in Database

The DBA_QUEUE_TABLES view contains information about the owner instance for a queue table. A queue table can contain multiple queues. In this case, each queue in a queue table has the same owner instance as the queue table. Its columns are the same as those in ALL_QUEUE_TABLES.

USER_QUEUE_TABLES: Queue Tables in User Schema

The USER_QUEUE_TABLES view is the same as DBA_QUEUE_TABLES with the exception that it only shows queue tables in the user's schema. It does not contain a column for OWNER.

ALL_QUEUE_TABLES: Queue Tables Queue Accessible to the Current User

The ALL_QUEUE_TABLES view describes queue tables accessible to the current user.

DBA_QUEUES: All Queues in Database

The DBA_QUEUES view specifies operational characteristics for every queue in a database. Its columns are the same as those ALL_QUEUES.

USER_QUEUES: Queues In User Schema

The USER_QUEUES view is the same as DBA_QUEUES with the exception that it only shows queues in the user's schema.

ALL_QUEUES: Queues for Which User Has Any Privilege

The ALL_QUEUES view describes all queues on which the current user has enqueue or dequeue privileges. If the user has any Advanced Queuing system privileges, like MANAGE ANY QUEUE, ENQUEUE ANY QUEUE or DEQUEUE ANY QUEUE, this view describes all queues in the database.

DBA_QUEUE_SCHEDULES: All Propagation Schedules

The DBA_QUEUE_SCHEDULES view describes all the current schedules in the database for propagating messages.

USER_QUEUE_SCHEDULES: Propagation Schedules in User Schema

The USER_QUEUE_SCHEDULES view is the same as DBA_QUEUE_SCHEDULES with the exception that it only shows queue schedules in the user's schema.

QUEUE_PRIVILEGES: Queues for Which User Has Queue Privilege

The QUEUE_PRIVILEGES view describes queues for which the user is the grantor, grantee, or owner. It also shows queues for which an enabled role on the queue is granted to PUBLIC.

AQ$Queue_Table_Name: Messages in Queue Table

The AQ$Queue_Table_Name view describes the queue table in which message data is stored. This view is automatically created with each queue table and should be used for querying the queue data. The dequeue history data (time, user identification and transaction identification) is only valid for single-consumer queues.

In a queue table that is created with the compatible parameter set to '8.1' or higher, messages that were not dequeued by the consumer are shown as "UNDELIVERABLE". You can dequeue these messages by msgid. If the Oracle Streams Advanced Queuing queue process monitor is running, then the messages are eventually moved to an exception queue. You can dequeue these messages from the exception queue with an ordinary dequeue.

A multiconsumer queue table created without the compatible parameter, or with the compatible parameter set to '8.0', does not display the state of a message on a consumer basis, but only displays the global state of the message.

Note:

Queues created in a queue table with compatible set to 8.0 (referred to in this guide as 8.0-style queues) are deprecated in Oracle Streams Advanced Queuing 10g Release 2 (10.2). Oracle recommends that any new queues you create be 8.1-style or newer and that you migrate existing 8.0-style queues at your earliest convenience.

When a message is dequeued using the REMOVE mode, DEQ_TIME, DEQ_USER_ID, and DEQ_TXN_ID are updated for the consumer that dequeued the message.

You can use MSGID and ORIGINAL_MSGID to chain propagated messages. When a message with message identifier m1 is propagated to a remote queue, m1 is stored in the ORIGINAL_MSGID column of the remote queue.

Beginning with Oracle Database 10g, AQ$Queue_Table_Name includes buffered messages. For buffered messages, the value of MSG_STATE is one of the following:

  • IN MEMORY

    Buffered messages enqueued by a user

  • DEFERRED

    Buffered messages enqueued by a capture process

  • SPILLED

    User-enqueued buffered messages that have been spilled to disk

  • DEFERRED SPILLED

    Capture-enqueued buffered messages that have been spilled to disk

  • BUFFERED EXPIRED

    Expired buffered messages

Table 9-1 AQ$Queue_Table_Name View

Column Datatype NULL Description

QUEUE

VARCHAR2(30)

-

Queue name

MSG_ID

RAW(16)

NOT NULL

Unique identifier of the message

CORR_ID

VARCHAR2(128)

-

User-provided correlation identifier

MSG_PRIORITY

NUMBER

-

Message priority

MSG_STATE

VARCHAR2(16)

-

Message state

DELAY

DATE

-

Time in date format at which the message in waiting state would become ready. Equals ENQUEUE_TIME + user specified DELAY

DELAY_TIMESTAMP

TIMESTAMP

-

Time as a timestamp format at which the message in waiting state would become ready. Equals ENQUEUE_TIMESTAMP + user specified DELAY

EXPIRATION

NUMBER

-

Number of seconds in which the message expires after being READY

ENQ_TIME

DATE

-

Enqueue time

ENQ_TIMESTAMP

TIMESTAMP

-

Enqueue time

ENQ_USER_ID

NUMBER

-

Enqueue user ID

ENQ_USER_ID (10.1 queue tables)

VARCHAR2(30)

-

Enqueue user name

ENQ_TXN_ID

VARCHAR2(30)

-

Enqueue transaction ID

DEQ_TIME

DATE

-

Dequeue time

DEQ_TIMESTAMP

TIMESTAMP

-

Dequeue time

DEQ_USER_ID

NUMBER

-

Dequeue user ID

DEQ_USER_ID (10.1 queue tables)

VARCHAR2(30)

-

Dequeue user name

DEQ_TXN_ID

VARCHAR2(30)

-

Dequeue transaction ID

RETRY_COUNT

NUMBER

-

Number of retries

EXCEPTION_QUEUE_OWNER

VARCHAR2(30)

-

Exception queue schema

EXCEPTION_QUEUE

VARCHAR2(30)

-

Exception queue name

USER_DATA

-

-

User data

SENDER_NAME

VARCHAR2(30)

-

Name of the agent enqueuing the message (valid only for 8.1-compatible queue tables)

SENDER_ADDRESS

VARCHAR2(1024)

-

Queue name and database name of the source (last propagating) queue (valid only for 8.1-compatible queue tables). The database name is not specified if the source queue is in the local database.

SENDER_PROTOCOL

NUMBER

-

Protocol for sender address (reserved for future use and valid only for 8.1-compatible queue tables)

ORIGINAL_MSGID

RAW(16)

-

Message ID of the message in the source queue (valid only for 8.1-compatible queue tables)

CONSUMER_NAME

VARCHAR2(30)

-

Name of the agent receiving the message (valid only for 8.1-compatible multiconsumer queue tables)

ADDRESS

VARCHAR2(1024)

-

Queue name and database link name of the agent receiving the message.The database link name is not specified if the address is in the local database. The address is NULL if the receiving agent is local to the queue (valid only for 8.1-compatible multiconsumer queue tables)

PROTOCOL

NUMBER

-

Protocol for address of receiving agent (valid only for 8.1-compatible queue tables)

PROPAGATED_MSGID

RAW(16)

-

Message ID of the message in the queue of the receiving agent (valid only for 8.1-compatible queue tables)

ORIGINAL_QUEUE_NAME

VARCHAR2(30)

-

Name of the queue the message came from

ORIGINAL_QUEUE_OWNER

VARCHAR2(30)

-

Owner of the queue the message came from

EXPIRATION_REASON

VARCHAR2(19)

-

Reason the message came into exception queue. Possible values are TIME_EXPIRATION (message expired after the specified expired time), MAX_RETRY_EXCEEDED (maximum retry count exceeded), and PROPAGATION_FAILURE (message became undeliverable during propagation).


Note:

A message is moved to an exception queue if RETRY_COUNT is greater than MAX_RETRIES. If a dequeue transaction fails because the server process dies (including ALTER SYSTEM KILL SESSION) or SHUTDOWN ABORT on the instance, then RETRY_COUNT is not incremented.

AQ$Queue_Table_Name_S: Queue Subscribers

The AQ$Queue_Table_Name_S view provides information about subscribers for all the queues in any given queue table. It shows subscribers created by users with DBMS_AQADM.ADD_SUBSCRIBER and subscribers created for the apply process to apply user-created events. It also displays the transformation for the subscriber, if it was created with one. It is generated when the queue table is created.

This view provides functionality that is equivalent to the DBMS_AQADM.QUEUE_SUBSCRIBERS() procedure. For these queues, Oracle recommends that the view be used instead of this procedure to view queue subscribers. This view is created only for 8.1-compatible queue tables.

Table 9-2 AQ$Queue_Table_Name_S View

Column Datatype NULL Description

QUEUE

VARCHAR2(30)

NOT NULL

Name of queue for which subscriber is defined

NAME

VARCHAR2(30)

-

Name of agent

ADDRESS

VARCHAR2(1024)

-

Address of agent

PROTOCOL

NUMBER

-

Protocol of agent

TRANSFORMATION

VARCHAR2(61)

-

Name of the transformation (can be null)


AQ$Queue_Table_Name_R: Queue Subscribers and Their Rules

The AQ$Queue_Table_Name_R view displays only the subscribers based on rules for all queues in a given queue table, including the text of the rule defined by each subscriber. It also displays the transformation for the subscriber, if one was specified. It is generated when the queue table is created.

This view is created only for 8.1-compatible queue tables.

Table 9-3 AQ$Queue_Table_Name_R View

Column Datatype NULL Description

QUEUE

VARCHAR2(30)

NOT NULL

Name of queue for which subscriber is defined

NAME

VARCHAR2(30)

-

Name of agent

ADDRESS

VARCHAR2(1024)

-

Address of agent

PROTOCOL

NUMBER

-

Protocol of agent

RULE

CLOB

-

Text of defined rule

RULE_SET

VARCHAR2(65)

-

Set of rules

TRANSFORMATION

VARCHAR2(61)

-

Name of the transformation (can be null)


DBA_QUEUE_SUBSCRIBERS: All Queue Subscribers in Database

The DBA_QUEUE_SUBSCRIBERS view returns a list of all subscribers on all queues in the database. Its columns are the same as those in ALL_QUEUE_SUBSCRIBERS.

USER_QUEUE_SUBSCRIBERS: Queue Subscribers in User Schema

The USER_QUEUE_SUBSCRIBERS view returns a list of subscribers on queues in the schema of the current user. Its columns are the same as those in ALL_QUEUE_SUBSCRIBERS except that it does not contain the OWNER column.

ALL_QUEUE_SUBSCRIBERS: Subscribers for Queues Where User Has Queue Privileges

The ALL_QUEUE_SUBSCRIBERS view returns a list of subscribers to queues that the current user has privileges to dequeue from.

DBA_TRANSFORMATIONS: All Transformations

The DBA_TRANSFORMATIONS view displays all the transformations in the database. These transformations can be specified with Advanced Queue operations like enqueue, dequeue and subscribe to automatically integrate transformations in messaging. This view is accessible only to users having DBA privileges.

DBA_ATTRIBUTE_TRANSFORMATIONS: All Transformation Functions

The DBA_ATTRIBUTE_TRANSFORMATIONS view displays the transformation functions for all the transformations in the database.

USER_TRANSFORMATIONS: User Transformations

The USER_TRANSFORMATIONS view displays all the transformations owned by the user. To view the transformation definition, query USER_ATTRIBUTE_TRANSFORMATIONS.

USER_ATTRIBUTE_TRANSFORMATIONS: User Transformation Functions

The USER_ATTRIBUTE_TRANSFORMATIONS view displays the transformation functions for all the transformations of the user.

DBA_SUBSCR_REGISTRATIONS: All Subscription Registrations

The DBA_SUBSCR_REGISTRATIONS view lists all the subscription registrations in the database.

USER_SUBSCR_REGISTRATIONS: User Subscription Registrations

The USER_SUBSCR_REGISTRATIONS view lists the subscription registrations in the database for the current user. Its columns are the same as those in DBA_SUBSCR_REGISTRATIONS.

AQ$INTERNET_USERS: Oracle Streams Advanced Queuing Agents Registered for Internet Access

The AQ$INTERNET_USERS view provides information about the agents registered for Internet access to Oracle Streams Advanced Queuing. It also provides the list of database users that each Internet agent maps to.

Table 9-4 AQ$INTERNET_USERS View

Column Datatype NULL Description

AGENT_NAME

VARCHAR2(30)

-

Name of the Oracle Streams Advanced Queuing Internet agent

DB_USERNAME

VARCHAR2(30)

-

Name of database user that this Internet agent maps to

HTTP_ENABLED

VARCHAR2(4)

-

Indicates whether this agent is allowed to access Oracle Streams Advanced Queuing through HTTP (YES or NO)

FTP_ENABLED

VARCHAR2(4)

-

Indicates whether this agent is allowed to access Oracle Streams Advanced Queuing through FTP (always NO in current release)


(G)V$AQ: Number of Messages in Different States in Database

The (G)V$AQ view provides information about the number of messages in different states for the whole database.

In a Oracle Real Application Clusters environment, each instance keeps its own Oracle Streams Advanced Queuing statistics information in its own System Global Area (SGA), and does not have knowledge of the statistics gathered by other instances. When a GV$AQ view is queried by an instance, all other instances funnel their Oracle Streams Advanced Queuing statistics information to the instance issuing the query.

(G)V$BUFFERED_QUEUES: All Buffered Queues in the Instance.

The V$BUFFERED_QUEUES view displays information about all buffered queues in the instance. There is one row per queue.

(G)V$BUFFERED_SUBSCRIBERS: Subscribers for All Buffered Queues in the Instance

The V$BUFFERED_SUBSCRIBERS view displays information about the subscribers for all buffered queues in the instance. There is one row per subscriber per queue.

(G)V$BUFFERED_PUBLISHERS: All Buffered Publishers in the Instance

The V$BUFFERED_PUBLISHERS view displays information about all buffered publishers in the instance. There is one row per queue per sender. The values are reset to zero when the database (or instance in an Oracle RAC environment) restarts.

(G)V$PERSISTENT_QUEUES: All Active Persistent Queues in the Instance

The V$PERSISTENT_QUEUES view displays information about all active persistent queues in the database since the queues' first activity time. There is one row per queue. The rows are deleted when the database (or instance in an Oracle RAC environment) restarts.

(G)V$PERSISTENT_QMN_CACHE: Performance Statistics on Background Tasks for Persistent Queues

The V$PERSISTENT_QMN_CACHE view displays detailed statistics about all background activities relating to all queue tables in the database. There is one row per queue table. The values are reset when the database (or instance in an Oracle RAC environment) restarts.

(G)V$PERSISTENT_SUBSCRIBERS: All Active Subscribers of the Persistent Queues in the Instance

The V$PERSISTENT_SUBSCRIBERS view displays information about all active subscribers of the persistent queues in the database. There is one row per instance per queue per subscriber. The rows are deleted when the database (or instance in an Oracle RAC environment) restarts.

(G)V$PERSISTENT_PUBLISHERS: All Active Publishers of the Persistent Queues in the Instance

The V$PERSISTENT_PUBLISHERS view displays information about all active publishers of the persistent queues in the database. There is one row per instance per queue per publisher. The rows are deleted when the database (or instance in an Oracle RAC environment) restarts.

(G)V$PROPAGATION_SENDER: Buffer Queue Propagation Schedules on the Sending (Source) Side

The V$PROPAGATION_SENDER view displays information about buffer queue propagation schedules on the sending (source) side. The values are reset to zero when the database (or instance in a Oracle Real Application Clusters (Oracle RAC) environment) restarts, when propagation migrates to another instance, or when an unscheduled propagation is attempted.

(G)V$PROPAGATION_RECEIVER: Buffer Queue Propagation Schedules on the Receiving (Destination) Side

The V$PROPAGATION_RECEIVER view displays information about buffer queue propagation schedules on the receiving (destination) side. The values are reset to zero when the database (or instance in a Oracle Real Application Clusters (Oracle RAC) environment) restarts, when propagation migrates to another instance, or when an unscheduled propagation is attempted.

(G)V$SUBSCR_REGISTRATION_STATS: Diagnosability of Notifications

The V$SUBSCR_REGISTRATION_STATS view provides information for diagnosability of notifications.

V$METRICGROUP: Information about the Metric Group

This V$METRICGROUP view displays information about the metric group for each of the four major Streams components: capture, propagation, apply, and queue.

(G)V$STREAMSMETRIC: Streams Metrics for the Most Recent Interval

This view displays the capture, propagation, and apply metrics for the most recent interval.

Table 9-5 GV$STREAMSMETRIC View

Column Datatype Description

INST_ID

Instance

ID (GV$ only)

BEGIN_TIME

DATE

Begin time of interval

END_TIME

DATE

End time of interval

INTSIZE_CSEC

NUMBER

Interval size (centi-seconds)

COMPONENT_TYPE

VARCHAR2(32)

Type of the component (either 'CAPTURE', 'PROPAGATION', or 'APPLY')

COMPONENT_NAME

VARCHAR2(32)

Name of streams component

COMPONENT_START_TIME

DATE

Time that component started

RATE1_VALUE

NUMBER

Value of rate 1

RATE1_NAME

VARCHAR2(64)

Name of rate1

RATE1_UNIT

VARCHAR2(64)

Unit of measurement of rate1

RATE2_VALUE

NUMBER

Value of rate 2

RATE2_NAME

VARCHAR2(64)

Name of rate2

RATE2_UNIT

VARCHAR2(64)

Unit of measurement of rate2

LATENCY

NUMBER

Latency from time last message processed by component was written to redo to time the message was processed by this component


(G)V$STREAMSMETRIC_HISTORY: Streams Metrics Over Past Hour

This view returns all metric values for streams messages over the past hour. It has the same form as (G)V$STREAMSMETRIC: Streams Metrics for the Most Recent Interval.

DBA_HIST_STREAMSMETRIC: Streams Metric History

This view displays view provides catalog access to streams metric history.

Table 9-6 DBA_HIST_STREAMSMETRIC View

Column Datatype Description

SNAP_ID

NUMBER

Required by AWR, snapshot ID

DBID

NUMBER

Required by AWR, database ID

INSTANCE_NUMBER

NUMBER

Required by AWR, instance number

BEGIN_TIME

DATE

Begin time of interval

END_TIME

DATE

End time of interval

INTSIZE

NUMBER

Interval size (centi-seconds)

COMPONENT_TYPE

VARCHAR2(32)

Type of the component (either 'CAPTURE', 'PROPAGATION', or 'APPLY')

COMPONENT_NAME

VARCHAR2(32)

Name of streams component

COMPONENT_START_TIME

DATE

Time that component started

RATE1_VALUE

NUMBER

Value of rate 1

RATE2_VALUE

NUMBER

Value of rate 2

LATENCY

NUMBER

Latency from time last message processed by component was written to redo to time the message was processed by this component


DBA_HIST_QUEUEMETRIC: Queue Metric History

This view displays view provides catalog access to queue metric history.

Table 9-7 DBA_ATTRIBUTE_TRANSFORMATIONS View

Column Datatype Description

SNAP_ID

NUMBER

Required by AWR, snapshot ID

DBID

NUMBER

Required by AWR, database ID

INSTANCE_NUMBER

NUMBER

Required by AWR, instance number

QUEUE_NAME

VARCHAR2(32)

Name of queue process

QUEUE_START_TIME

DATE

Time when queue started

BEGIN_TIME

DATE

Begin time of interval

END_TIME

DATE

End time of interval

INTSIZE

NUMBER

Interval size (centi-seconds)

ENQUEUED_PER_SECOND

NUMBER

Messages enqueue per second

SPILLED_PER_SECOND

NUMBER

Messages spilled per second

NUMMESSAGES

NUMBER

Number of messages in the queue


MGW_GATEWAY: Configuration and Status Information

This view lists configuration and status information for Messaging Gateway.

Table 9-8 MGW_GATEWAY View Properties

Name Type Description

AGENT_DATABASE

VARCHAR2

The database connect string used by the Messaging Gateway agent. NULL indicates that a local connection is used.

AGENT_INSTANCE

NUMBER

The database instance on which the Messaging Gateway agent is currently running. This should be NULL if the agent is not running.

AGENT_JOB

NUMBER

[Deprecated] Job number of the queued job used to start the Messaging Gateway agent process. The job number is set when Messaging Gateway is started and cleared when it shuts down.

AGENT_NAME

VARCHAR2

Name of the Messaging Gateway agent

AGENT_PING

VARCHAR2

Gateway agent ping status. Values:

  • NULL means no ping attempt was made.

  • REACHABLE means ping attempt was successful.

  • UNREACHABLE means ping attempt failed.

AGENT_PING attempts to contact the Messaging Gateway agent. There is a short delay (up to 5 seconds) if the ping attempt fails. No ping is attempted if the AGENT_STATUS is NOT_STARTED or START_SCHEDULED.

AGENT_START_TIME

TIMESTAMP

The time when the Messaging Gateway agent job currently running was started. This should be NULL if the agent is not running.

AGENT_STATUS

VARCHAR2

Status of the Messaging Gateway agent. Values:

  • NOT_STARTED means the Messaging Gateway agent has not been started

  • START_SCHEDULED means Messaging Gateway agent has been scheduled to start. That is, Messaging Gateway has been started using DBMS_MGWADM.STARTUP, but the queued job used to start the Messaging Gateway agent has not yet run.

  • STARTING means Messaging Gateway agent is starting. That is, Messaging Gateway has been started using DBMS_MGWADM.STARTUP, the queued job has run, and the Messaging Gateway agent is starting up.

  • INITIALIZING means the Messaging Gateway agent has started and is initializing

  • RUNNING means the Messaging Gateway agent is running

  • SHUTTING_DOWN means the Messaging Gateway agent is shutting down

  • BROKEN means an unexpected condition has been encountered that prevents the Messaging Gateway agent from starting. DBMS_MGWADM.CLEANUP_GATEWAY must be called before the agent can be started.

AGENT_USER

VARCHAR2

Database username used by the Messaging Gateway agent to connect to the database

COMMENTS

VARCHAR2

Comments for the agent

CONNTYPE

VARCHAR2

Connection type used by the agent:

  • JDBC_OCI if the JDBC OCI driver is used

  • JDBC_THIN if the JDBC Thin driver is used

INITFILE

VARCHAR2

Name of the Messaging Gateway initialization file used by the agent. NULL indicates that the default initialization file is used.

LAST_ERROR_DATE

DATE

Date of last Messaging Gateway agent error. The last error information is cleared when Messaging Gateway is started. It is set if the Messaging Gateway agent fails to start or terminates due to an abnormal condition.

LAST_ERROR_MSG

VARCHAR2

Message for last Messaging Gateway agent error

LAST_ERROR_TIME

VARCHAR2

Time of last Messaging Gateway agent error

MAX_CONNECTIONS

NUMBER

[Deprecated] Maximum number of messaging connections to Oracle Database

MAX_MEMORY

NUMBER

Maximum heap size used by the Messaging Gateway agent (in MB)

MAX_THREADS

NUMBER

Maximum number of messaging threads created by the Messaging Gateway agent

SERVICE

VARCHAR2

Name of the database service that is associated with an Oracle Scheduler job class used by the agent


MGW_AGENT_OPTIONS: Supplemental Options and Properties

This view lists supplemental options and properties for a Messaging Gateway agent.

Table 9-9 MGW_AGENT_OPTIONS View

Column Type Description

AGENT_NAME

VARCHAR2

Name of the Messaging Gateway agent

ENCRYPTED

VARCHAR2

Indicates whether the value is stored as encrypted:

  • TRUE if the value is stored encrypted

  • FALSE if the value is stored as cleartext

NAME

VARCHAR2

Name of the option

TYPE

VARCHAR2

Option type or usage: JAVA_SYSTEM_PROP if the option is used to set a Java System property

VALUE

VARCHAR2

Value for the option. This will be <<ENCRYPTED>> if the value is stored in an encrypted form.


MGW_LINKS: Names and Types of Messaging System Links

This view lists the names and types of messaging system links currently defined.

Table 9-10 MGW_LINKS View Properties

Name Type Description

AGENT_NAME

VARCHAR2

Name of the Messaging Gateway agent that will process propagation jobs for this link

LINK_COMMENT

VARCHAR2

User comment for the link

LINK_NAME

VARCHAR2

Name of the messaging system link

LINK_TYPE

VARCHAR2

Type of messaging system link. Values

  • MQSERIES is for WebSphere MQ links.

  • TIBRV is for TIB/Rendezvous links.


MGW_MQSERIES_LINKS: WebSphere MQ Messaging System Links

This view lists information for the WebSphere MQ messaging system links. The view includes most of the messaging system properties specified when the link is created.

Table 9-11 MGW_MQSERIES_LINKS View Properties

Name Type Description

AGENT_NAME

VARCHAR2

Name of the Messaging Gateway agent that will process propagation jobs for this link

CHANNEL

VARCHAR2

Connection channel

HOSTNAME

VARCHAR2

Name of the WebSphere MQ host

INBOUND_LOG_QUEUE

VARCHAR2

Inbound propagation log queue

INTERFACE_TYPE

VARCHAR2

Messaging interface type. Values:

  • BASE_JAVA is for WebSphere MQ Base Java interface

  • JMS_CONNECTION is for WebSphere MQ JMS unified, domain-independent connections

  • JMS_QUEUE_CONNECTION is for WebSphere MQ JMS queue connections

  • JMS_TOPIC_CONNECTION is for WebSphere MQ JMS topic connections

LINK_COMMENT

VARCHAR2

User comment for the link

LINK_NAME

VARCHAR2

Name of the messaging system link

MAX_CONNECTIONS

NUMBER

Maximum number of messaging connections

OPTIONS

SYS.MGW_PROPERTIES

Link options

OUTBOUND_LOG_QUEUE

VARCHAR2

Outbound propagation log queue

PORT

NUMBER

Port number

QUEUE_MANAGER

VARCHAR2

Name of the WebSphere MQ queue manager


MGW_TIBRV_LINKS: TIB/Rendezvous Messaging System Links

This view lists information for TIB/Rendezvous messaging system links. The view includes most of the messaging system properties specified when the link was created.

Table 9-12 MGW_TIBRV_LINKS View Properties

Property Name Type Description

AGENT_NAME

VARCHAR2

Name of the Messaging Gateway agent that will process propagation jobs for this link

CM_LEDGER

VARCHAR2

TIB/Rendezvous CM ledger file name

CM_NAME

VARCHAR2

TIB/Rendezvous CM correspondent name

DAEMON

VARCHAR2

TIB/Rendezvous daemon parameter for RVD transport

LINK_COMMENT

VARCHAR2

User comment for the link

LINK_NAME

VARCHAR2

Name of the messaging system link

NETWORK

VARCHAR2

TIB/Rendezvous network parameter for rvd transport

OPTIONS

SYS.MGW_PROPERTIES

Link options

SERVICE

VARCHAR2

TIB/Rendezvous service parameter for rvd transport


MGW_FOREIGN_QUEUES: Foreign Queues

This view lists information for foreign queues. The view includes most of the queue properties specified when the queue is registered.

Table 9-13 MGW_FOREIGN_QUEUES View Properties

Name Type Description

DOMAIN

VARCHAR2

Queue domain type. Values:

  • NULL means the queue domain type is automatically determined by the messaging system

  • QUEUE is for a queue (point-to-point) model

  • TOPIC is for a topic (publish-subscribe) model

LINK_NAME

VARCHAR2

Name of the messaging system link

NAME

VARCHAR2

Name of the registered queue

OPTIONS

SYS.MGW_PROPERTIES

Optional queue properties

PROVIDER_QUEUE

VARCHAR2

Message provider (native) queue name

QUEUE_COMMENT

VARCHAR2

User comment for the foreign queue


MGW_JOBS: Messaging Gateway Propagation Jobs

This view lists information for Messaging Gateway propagation jobs. The view includes most of the job properties specified when the propagation job was created, as well as other status and statistical information.

Table 9-14 MGW_JOBS View

Column Type Description

AGENT_NAME

VARCHAR2

Name of the Messaging Gateway agent that processes this job

COMMENTS

VARCHAR2

Comments for the propagation job

DESTINATION

VARCHAR2

Destination queue to which messages are propagated

ENABLED

VARCHAR2

Indicates whether the job is enabled or not:

  • TRUE if the job is enabled

  • FALSE if the job is disabled

EXCEPTION_QUEUE

VARCHAR2

Exception queue used for propagation logging purposes

EXCEPTIONQ_MSGS

NUMBER

Option type or usage: JAVA_SYSTEM_PROP if the option is used to set a Java System property

FAILURES

NUMBER

Number of messages moved to exception queue since the last time the agent was started

JOB_NAME

VARCHAR2

Name of the propagation job

LAST_ERROR_MSG

VARCHAR2

Message for the last propagation error

LAST_ERROR_DATE

DATE

Date of the last propagation error

LAST_ERROR_TIME

VARCHAR2

Time of the last propagation error

LINK_NAME

VARCHAR2

Name of the Messaging Gateway link used by this job

OPTIONS

SYS.MGW_PROPERTIES

Job options

POLL_INTERVAL

INTEGER

Propagation poll interval (in seconds)

PROPAGATED_MSGS

NUMBER

Number of messages propagated since the last time the agent was started

PROP_STYLE

VARCHAR2

Message propagation style:

  • NATIVE for native message propagation

  • JMS for JMS message propagation

PROPAGATION_TYPE

VARCHAR2

Propagation type:

  • OUTBOUND is for Oracle Streams AQ to non-Oracle propagation

  • INBOUND is for non-Oracle to Oracle Streams AQ propagation

RULE

VARCHAR2

Subscription rule used for the propagation source

SOURCE

VARCHAR2

Source queue from which messages are propagated

STATUS

VARCHAR2

Job status:

  • READY means the job is ready for propagation. The job must be enabled and the Messaging Gateway agent running before messages are actually propagated.

  • RETRY means the agent encountered errors when attempting to propagate messages for the job and will retry the operation

  • FAILED means the job has failed and agent has stopped trying to propagate messages. Usually this is due to an unrecoverable error or the propagation failure limit being reached. The job must be reset before the agent will attempt to propagate messages. The job is automatically reset each time the agent is started and can be manually reset by DBMS_MGWADM.RESET_JOB.

  • DELETE_PENDING means that job removal is pending. DBMS_MGWADM.REMOVE_JOB has been called but certain cleanup tasks for this job are still outstanding.

  • SUBSCRIBER_DELETE_PENDING means that removal is pending for the subscriber associated with the job. DBMS_MGWADM.REMOVE_SUBSCRIBER has been called but certain cleanup tasks are still outstanding.

TRANSFORMATION

VARCHAR2

Transformation used for message conversion


MGW_SUBSCRIBERS: Information for Subscribers

This view lists configuration and status information for Messaging Gateway subscribers. The view includes most of the subscriber properties specified when the subscriber is added, as well as other status and statistical information.

Table 9-15 MGW_SUBSCRIBERS View Properties

Name Type Description

DESTINATION

VARCHAR2

Destination queue to which messages are propagated

EXCEPTIONQ_MSGS

NUMBER

Number of messages moved to the propagation exception queue since the last time the agent was started

EXCEPTION_QUEUE

VARCHAR2

Exception queue used for logging purposes

FAILURES

NUMBER

Number of propagation failures

LAST_ERROR_DATE

DATE

Date of last propagation error

LAST_ERROR_MSG

VARCHAR2

Message for last propagation error

LAST_ERROR_TIME

VARCHAR2

Time of last propagation error

OPTIONS

SYS.MGW_PROPERTIES

Subscriber options

PROP_STYLE

VARCHAR2

Message propagation style. Values:

  • NATIVE is for native message propagation

  • JMS is for JMS message propagation

PROPAGATED_MSGS

NUMBER

Number of messages propagated to the destination queue since the last time the agent was started

PROPAGATION_TYPE

VARCHAR2

Propagation type. Values:

  • OUTBOUND is for Oracle Streams AQ to non-Oracle propagation

  • INBOUND is for non-Oracle to Oracle Streams AQ propagation

QUEUE_NAME

VARCHAR2

Subscriber source queue

RULE

VARCHAR2

Subscription rule

STATUS

VARCHAR2

Subscriber status. Values:

  • ENABLED means the subscriber is enabled

  • DELETE_PENDING means subscriber removal is pending, usually because DBMS_MGWADM.REMOVE_SUBSCRIBER has been called but certain cleanup tasks pertaining to this subscriber are still outstanding

SUBSCRIBER_ID

VARCHAR2

Propagation subscriber identifier

TRANSFORMATION

VARCHAR2

Transformation used for message conversion


MGW_SCHEDULES: Information about Schedules

This view lists configuration and status information for Messaging Gateway schedules. The view includes most of the schedule properties specified when the schedule is created, as well as other status information.

Table 9-16 MGW_SCHEDULES View Properties

Name Type Description

DESTINATION

VARCHAR2

Propagation destination

LATENCY

NUMBER

Propagation window latency (in seconds)

NEXT_TIME

VARCHAR2

Reserved for future use

PROPAGATION_TYPE

VARCHAR2

Propagation type. Values:

  • OUTBOUND is for Oracle Streams AQ to non-Oracle propagation

  • INBOUND is for non-Oracle to Oracle Streams AQ propagation

PROPAGATION_WINDOW

NUMBER

Reserved for future use

SCHEDULE_DISABLED

VARCHAR2

Indicates whether the schedule is disabled. Y means the schedule is disabled. N means the schedule is enabled.

SCHEDULE_ID

VARCHAR2

Propagation schedule identifier

SOURCE

VARCHAR2

Propagation source

START_DATE

DATE

Reserved for future use

START_TIME

VARCHAR2

Reserved for future use