The first table name is at position 1, the second at position 2, and so on. If you change the capture user, then this procedure grants the new capture user enqueue privilege on the queue used by the synchronous capture and configures the user as a secure queue user of the queue. The first SCN for a capture process is the lowest SCN in the redo log from which the capture process can capture changes.You can specify the first SCN for a capture process when you run the CREATE_CAPTURE or ALTER_CAPTURE procedure in the DBMS_CAPTURE_ADM package. For example, specify HR for the hr user. How to recover Streams capture when it is 'WAITING For REDO' [ID 843267.1], In this DocumentSymptomsChangesCauseSolutionA) When MISSING archivelogs CAN be restored. Creation of the first capture process in a database might take some time because the data dictionary is duplicated during this creation. For decreasing sequences, the sequence values at the destination are less than or equal to the sequence values at the source database. They of the configuration will be covered as well as details on the log files to the Down Streams database. Ensure that the PROCESSES initialization parameter is set appropriately when you set the parallelism capture process parameter. Controls whether the capture process captures DML changes in the specified transactions. It prepares source database If FALSE, then the procedure does not drop the rule sets used by the specified capture process, and the rule sets retain their rules. Down Streams Capture involves the execution SCNs after the lowest SCN for an object can be used for instantiating the object. between the source and Down Streams sites. The name of the positive rule set for the synchronous capture. In this case, the capture process does not capture any changes in the redo data before the start SCN. process does not use a database link, the above actions need to If any archive are missing or deleted by manually or by RMAN jobs then the continuity sequence breaks and Streams capture process will not be able to move until the missing archive logs will be available . Down Streams feature is available only in the 10g version. Run this procedure at the source database. See Also: Oracle Streams Concepts and Administration for more information about capture process components. See Also: "Usage Notes" for more information about this parameter and "SET_PARAMETER Procedure" for information about the apply_sequence_nextval apply process parameter. For example, to specify a positive rule set in the strmadmin schema named sync_cap_rules, enter strmadmin.sync_cap_rules. Linux > The pattern match is case sensitive. This package provides interfaces to start, stop, and configure a capture process or a synchronous capture. For example, hr.employees. If N, then the capture process is an archived-log downstream capture process. If you specify NULL, and no positive rule set is specified, then the capture process captures all supported changes to all objects in the database, excluding database objects in the SYS and SYSTEM schemas. If there are any in-flight transactions, then the BUILD procedure waits until these transactions commit before completing. If you use a capture process to capture all of the changes to a table, then use this procedure to prepare the table for instantiation after the capture process has been configured. If N, then the capture process ignores DML changes if the original user is not specified in the excludeuserid or excludeuser parameters and the transaction name is not specified in the excludetrans parameter. If you specify NULL and the remove_negative_rule_set parameter is set to FALSE, then the procedure retains any existing negative rule set. Because the Down Streams Capture process needs If there are any in-flight transactions, then the BUILD procedure waits until these transactions commit before completing. A capture process uses Oracle LogMiner to scan for changes in the redo log. Oracle Streams clients include capture processes, propagations, apply processes, and messaging clients. Note: The capture_name setting cannot be altered after the capture process is created. One version of this procedure contains the OUT parameter first_scn, and the other does not. The new capture process uses the resulting build of the source data dictionary in the redo log to create a LogMiner data dictionary the first time it is started, and the first SCN corresponds to the SCN of the data dictionary build. The archive log files from the source database are For example. The columns are logged unconditionally. This procedure reverses the effects of running the PREPARE_TABLE_INSTANTIATION procedure. Depending on whether or not the database link is If there is no existing capture process for the local source database (or if no existing capture processes have taken a checkpoint yet), and the specified start SCN is less than the current SCN for the database, then an error is raised. are as follows: When a Capture process is See "Capture Process Parameters" for a list of these parameters. The stream is not split regardless of the amount of time that it is broken.

This user must have the necessary privileges to capture changes. Table 32-16 SET_PARAMETER Procedure Parameters. Partial days can be specified using decimal values. database is single instance or multi-instance. 1996 -2017 by Burleson. table_name. If the capture process cannot stop normally, then an ORA-26672 error is returned, and the capture process might continue to run. Also, the capture process must be stopped before resetting its start SCN. Typically, the thread number is relevant only in an Oracle Real Application Clusters (Oracle RAC) environment. source database. Table 32-14 PREPARE_SYNC_INSTANTIATION Function Parameter. An apply process or XStream inbound server can use sequence LCRs to ensure that the sequence values at a destination database use the appropriate values. After executing this procedure, you can query the FIRST_CHANGE# column of the V$ARCHIVED_LOG dynamic performance view where the DICTIONARY_BEGIN column is YES to determine the lowest SCN value for the database that can be specified as a first SCN for a capture process. This chapter contains the following topics: This section contains topics which relate to using the DBMS_CAPTURE_ADM package. The capture process must be stopped before resetting its start time. Only the SYS user can set the capture_user to SYS. This function is overloaded. For example, to specify a negative rule set in the hr schema named neg_capture_rules, enter hr.neg_capture_rules.

The name of the capture process or synchronous capture. If KEYS is specified, then this procedure enables supplemental logging for primary key, unique key, bitmap index, and foreign key columns in the table. Down Streams database may or may not use the database link to Hence, if the status is DISABLED or ABORTED, then the capture process is not started upon database instance startup. If this parameter is set to Y, then redo data from the source database must be sent to the standby redo log at the downstream database. The capture process can pass these changes to a rule-based transformation function. After setting this parameter to Y, switch the redo log file at the source database using the SQL statement ALTER SYSTEM ARCHIVE LOG CURRENT to begin real-time downstream capture. Capture processes do not fully support capturing changes to some data types from the redo log. The table does not need to be NULL terminated. When a table name is specified, the capture process does not capture changes to the specified table. database, multiple targets can be serviced. The type is VARCHAR2. References. Do not specify an owner. If you use a capture process to capture all of the changes to a schema, then use this procedure to prepare the tables in the schema for instantiation after the capture process has been configured. Note: Using XStream requires purchasing a license for the Oracle GoldenGate product. If FALSE, then the specified attribute is excluded from LCRs captured by the capture process or synchronous capture. The name of the parameter you are setting. Run this procedure at the source database. Capture Configuration. Information about such a rule is removed even if the rule is not in either rule set for the capture process. There are existing capture processes that capture changes to the source database at the downstream database, but none of the capture processes have taken a checkpoint yet, and the specified value for the start_scn parameter is greater than or equal to the current SCN for the source database. The capture process uses LogMiner to capture changes in the redo information. log files are assigned implicitly to the Capture process running Oracle recommends that, at capture process creation time, the difference between the first SCN and start SCN be as small as possible to keep the amount of redo scanned by the capture process to a minimum. To ignore multiple transactions, specify each transaction in a separate call to the SET_PARAMETER procedure. If you want to use a positive rule set for the capture process, then you must specify an existing rule set in the form [schema_name.]rule_set_name. NOTE:273674.1 - Streams Configuration Report and Health Check ScriptNOTE:471713.1 - Different States of Capture & Apply ProcessNOTE:550955.1 - Instantiating Objects Using Original Export/Import and Data Pump Export/Import - ExampleNOTE:551106.1 - Instantiating Objects in Streams Using Transportable Tablespace or RMANNOTE:729860.1 - Troubleshooting Queries in StreamsNOTE:735976.1 - All Replication Configuration Views For Streams, AQ, CDC and Advanced Replication, ITPUB http://blog.itpub.net/611609/viewspace-712771/, If NULL, then the capture user is not changed. The start status is persistently recorded. The memory is allocated for the duration of the capture process session and is released when the capture process becomes disabled. In either case, the capture process captures a DML change only if it satisfies the capture process's rule sets. For example, hr.employees. If you specify explicit for this parameter for a local capture process, then the local capture process cannot use the online redo log to find changes. Table 32-11 INCLUDE_EXTRA_ATTRIBUTE Procedure Parameters. For example, to specify a positive rule set in the hr schema named job_capture_rules, enter hr.job_capture_rules. For example, hr.employees. Note: The queue_name setting cannot be altered after the synchronous capture is created. If the schema is not specified, then the current user is the default. In such cases, stop and drop the capture and apply process and manually sync both the databases. The procedure places all of the columns for the table in an unconditional log group. If the schema is not specified, then the current user is the default. SCNs after the lowest SCN for an object can be used for instantiating the object. An apply process can apply these changes using the information available the ID key LCRs. The Down If INFINITE, then automatic splitting is disabled. Oracle Streams Concepts and Administration, Oracle Streams Replication Administrator's Guide, Oracle Data Guard Concepts and Administration, The new capture process is created at the local database with a new LogMiner session starting from the value specified for the. dictionary at the Down Streams database. If ALL is specified, then this procedure enables supplemental logging for all columns in the tables in the schema and for any table added to this schema in the future. Table 32-10 DROP_CAPTURE Procedure Parameters. When the CREATE_SYNC_CAPTURE procedure creates a synchronous capture, the procedure must obtain an exclusive lock on each table for which it will capture changes. freeing up resources at the source database. If you remove a negative rule set for a capture process, and a positive rule set exists for the capture process, then the capture process captures all changes that are not discarded by the positive rule set. If you want to exclude an extra attribute that is being captured by a capture process or synchronous capture, then specify the attribute and specify FALSE for the include parameter. In addition, ensure that capture user has the following privileges: EXECUTE privilege on the rule sets used by the synchronous capture. The rules in the specified rule set for the synchronous capture determine these tables. If you specify NULL and the remove_negative_rule_set parameter is set to TRUE, then the procedure removes any existing negative rule set. A typical scenario of Streams data flow In an XStream configuration where an outbound server runs on a different database than its capture process, set this parameter to Y to enable the capture process to send LCRs to the outbound server. The type is NUMBER. be carried out manually. This procedure performs the synchronization necessary for instantiating the table at another database and can enable supplemental logging for key columns or all columns in the table. If a Down Streams Capture i) Get all the archive logs required for the capture process to get restarted : ii) Copy all the missing archives from the backup to the main archive location or in case of RMAN use the following syntax : iii). This procedure reverses the effects of running the PREPARE_GLOBAL_INSTANTIATION, PREPARE_SCHEMA_INSTANTIATION, and PREPARE_TABLE_INSTANTIATION procedures. A capture process is an Oracle background process with a name in the form CPnn, where nn can include letters and numbers. Oracle Server - Enterprise Edition - Version: 9.2.0.1 to 11.2.0.2 - Release: 9.2 to 11.2Information in this document applies to any platform. If Y, then the capture process does not capture data definition language (DDL) changes to tables that are automatically filtered by the capture process. If NULL, then the parameter is set to its default value. The first table name is at position 1, the second at position 2, and so on. Controls the amount of system global area (SGA) memory allocated specifically to the capture process, in megabytes. The Capture Process Must Be Stopped Before It Is Dropped, The DROP_CAPTURE Procedure and Rules-related Information. See Also: Oracle Streams Concepts and Administration for more information about the changes that can be captured by a synchronous capture. Comma-delimited list of transaction names. If the schema is not specified, then the current user is the default. In addition, ensure that the capture user has the following privileges: EXECUTE privilege on all rule-based transformation functions used in the positive rule set. It also reverses the effects of running the PREPARE_TABLE_INSTANTIATION procedure on tables in the specified schema. this remote database scans and processes the archived log files If you specify a new first SCN for the capture process, then the specified first SCN must meet the following requirements: It must be greater than the current first SCN for the capture process. specified during Capture process creation. When the table_names parameter is VARCHAR2 data type, a comma-delimited list of the tables for which to abort the effects of preparing instantiation. Only a user who is granted the DBA role can set a capture user. Corporation. activity occurs and propagate the LCR events to the desired ii). CASCADE, then the capture process is also dropped automatically. An error is returned if an invalid time is specified. If the schema is not specified, then the current user is the default. for the database changes and enqueues the Logical Change Record source database, where the transactions are taking place, to the Linux > The following usage notes apply to this procedure: You can run this procedure multiple times at a source database. The capture process's rule sets can filter sequence LCRs in the same way that they filter row LCRs and DDL LCRs.

In addition, ensure that the capture user has the following privileges: EXECUTE privilege on the rule sets used by the capture process, EXECUTE privilege on all rule-based transformation functions used in the rule set. Specify an existing capture process name or synchronous capture name. For parameters that require an SCN setting, any valid SCN value can be specified. The thread number of the instance in which the change captured in the LCR was performed. Figure 8.1 Down Streams Capture and the Do not use this parameter in an Oracle Streams replication environment unless XStream capabilities are enabled by the DBMS_XSTREAM_ADM.ENABLE_GG_XSTREAM_FOR_STREAMS procedure. Note: The queue_name setting cannot be altered after the capture process is created. If N, then the capture process ignores DML changes if the original user is specified in the excludeuserid or excludeuser parameters and the transaction name is specified in the excludetrans parameter. The new capture process creates a new LogMiner data dictionary if either one of the following conditions is true: There is no existing capture process that captures changes to the source database at the downstream database, and the specified value for the start_scn parameter is greater than or equal to the current SCN for the source database. The table_names parameter is VARCHAR2 data type in one version and DBMS_UTILITY.UNCL_ARRAY data type in the other version. iv). Primary key columns are logged unconditionally. log files from multiple source databases where the transactional If 0 (zero) is specified, then there must be no lag between the original capture process and the cloned capture process to begin the merge. The Down Streams capture configuration also The frequency at which messages captured by the capture process are tracked automatically. For example, if this parameter is set to the default value of 2000000, then every two-millionth message is tracked automatically. The CAPTURE_MESSAGE_CREATE_TIME is recorded in the V$STREAMS_CAPTURE view. Specify an exact pattern match for each user name. A valid time from which the capture process starts capturing changes. The capture process is disabled before capturing a change record with an SCN greater than or equal to the value specified. the source. If you use a capture process to capture all of the changes to a database, then use this procedure to prepare the tables in the database for instantiation after the capture process has been configured. The following usage notes apply to the SET_PARAMETER procedure: Delays Are Possible Before New Parameter Settings Take Effect, Parameters Interpreted as Positive Integers, Parameters with a System Change Number (SCN) Setting, Parameters that Require XStream Capabilities.

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