DBA之路---Stream数据共享同步机制与配置方法

在Oracle数据库中，Streams是一种同步数据的机制，它可以在数据库之间实现数据的实时或近实时同步。以下是配置Streams的基本步骤：

1. 确保数据库之间的网络连接正常。
2. 在源数据库和目标数据库上配置DB Link。
3. 在源数据库上创建Streams的管理用户并授权。
4. 配置Streams的源端和目标端。
5. 启动Streams。

以下是配置Streams的示例代码：

-- 在源数据库上创建Streams管理用户
CREATE USER streamsadmin IDENTIFIED BY password;
GRANT DBA TO streamsadmin;
 
-- 在目标数据库上创建Streams管理用户（如果不是同一数据库）
-- CREATE USER streamsadmin IDENTIFIED BY password;
-- GRANT DBA TO streamsadmin;
 
-- 在源数据库上配置Stream
BEGIN
  DBMS_STREAMS_ADM.SET_UP_QUEUE(
    queue_name          => 'streams_queue',
    stream_type         => 'APPLY',
    queue_table         => 'streams_queue_table',
    queue_user          => 'streamsadmin',
    batch_size          => 100,
    batch_schedule      => 'NULL',
    log_events          => FALSE,
    include_dml         => TRUE,
    include_ddl         => TRUE,
    include_tagged_lcr  => FALSE,
    scan_interval       => 10,
    standby_enabled     => FALSE,
    parallelism         => 1,
    file_name           => 'streams_queue_table.dbf',
    execute_immediately => TRUE);
END;
/
 
-- 启动Stream
BEGIN
  DBMS_STREAMS_ADM.START_SCHEMA_GEN(
    schema_name   => 'SOURCE_SCHEMA',
    execute_immediately => TRUE);
END;
/
 
-- 在目标数据库上配置Stream
BEGIN
  DBMS_STREAMS_ADM.SET_UP_QUEUE(
    queue_name          => 'streams_queue',
    stream_type         => 'APPLY',
    queue_table         => 'streams_queue_table',
    queue_user          => 'streamsadmin',
    batch_size          => 100,
    batch_schedule      => 'NULL',
    log_events          => FALSE,
    include_dml         => TRUE,
    include_ddl         => TRUE,
    include_tagged_lcr  => FALSE,
    scan_interval       => 10,
    standby_enabled     => FALSE,
    parallelism         => 1,
    file_name           => 'streams_queue_table.dbf',
    execute_immediately => TRUE);
END;
/
 
-- 启动Stream
BEGIN
  DBMS_STREAMS_ADM.START_SCHEMA_GEN(
    schema_name   => 'TARGET_SCHEMA',
    execute_immediately => TRUE);
END;
/
 
-- 配置源数据库和目标数据库之间的Stream
BEGIN
  DBMS_STREAMS_ADM.ADD_SUBSCRIBER(
    subscriber       => 'SUBSCRIBER_NAME',
    queue_name       => 'streams_queue',
    stream_name      => 'SOURCE_TO_TARGET',
    source_database  => 'SOURCE_DB',
    destination_database => 'TARGET_DB',
    transport_type   => 'ADAPTER_Oracle',
    execute_immediately => TRUE);
END;
/
 
-- 启动Stream
BEGIN
  DBMS_STREAMS_ADM.START_SUBSCRIPTION(
    subscription_name =>