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Oracle 视图 DBA_STREAMS_KEEP_COLUMNS 官方解释，作用，如何使用详细说明

本站中文解释

Oracle视图DBA_STREAMS_KEEP_COLUMNS提供了当前数据库上所有Streams保留字段的信息，其中包括每列在应用程序、消息和消息组中的数据和元数据。 通过使用这个视图，DBA可以查询出数据库中当前所有保留字段的详细信息，也可以确认是否存在特定的保留字段以及它的使用情况。

使用方法：

1.查询某个表的Streams保留字段：
SELECT * FROM DBA_STREAMS_KEEP_COLUMNS WHERE OWNER = ‘OWNER_NAME’ AND TABLE_NAME = ‘TABLE_NAME’;

2.查询数据库所有Streams保留字段：
SELECT * FROM DBA_STREAMS_KEEP_COLUMNS;

官方英文解释

DBA_STREAMS_KEEP_COLUMNS displays information about declarative rule-based transformations that keep a list of columns in a row logical change record (LCR).

Column Datatype NULL Description

RULE_OWNER

VARCHAR2(128)

Owner of the rule which has an associated transformation

RULE_NAME

VARCHAR2(128)

Name of the rule which has an associated transformation

SCHEMA_NAME

VARCHAR2(128)

Schema of the column to be kept

TABLE_NAME

VARCHAR2(128)

Table of the column to be kept

COLUMN_NAME

VARCHAR2(4000)

Column to keep

VALUE_TYPE

VARCHAR2(3)

Indicates whether to keep the old (OLD), new (NEW), or both (*) value of the LCR

PRECEDENCE

NUMBER

0 (the execution order relative to other transformations on the same STEP_NUMBER; the smaller number will be executed first)

STEP_NUMBER

NUMBER

Order in which this transformation should be executed


数据运维技术 » Oracle 视图 DBA_STREAMS_KEEP_COLUMNS 官方解释，作用，如何使用详细说明
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