当undo_management 被设置成MENUAL时使用系统回滚段, 即将 undo records 记录到 SYSTEM 表空间下的 SYSTEM 段。 select segment_name,tablespace_name,bytes,next_extent from dba_segments where segment_type='ROLLBACK'; 1. 通过上面的这条语句,我们查到了这个用于 rollback 的 system segment 存在 与system 表...
1.1.1 Oracle FlashbackQuery Use this featureto retrieve data for an earlier time that you specify with the AS OF clauseof the SELECT statement. --使用这个特性可以在select 语句中使用as of 子句来查询之前某个时间的数据。 1.1.2 Oracle FlashbackVersion Query Use this featureto retrieve metadata...
to view all the rows of a table that ever existed during a given timeinterval). Metadata for each row version includes start and end time, type ofchange operation, and identity of the transaction that created the row version.To create an Oracle Flashback Version Query, use theVERSIONS...
Oracle Database Development Guideto learn about Oracle Flashback Query Oracle Database Architecture Adatabase serveris the key to information management. In general, aserverreliably manages a large amount of data in a multiuser environment so that users can concurrently access the same data. A data...
Setting Flashback Query To process certain update records, Extract fetches additional row data from the source database. Oracle GoldenGate fetches data for the following: User-defined types Nested tables XMLType objects By default, Oracle GoldenGate uses Flashback Query to fetch the values fr...
Lists all datafiles not backed up in the last three days. It does not imply that the datafile is not recoverable.21.To clean up old records that are in a Flashback Data Archive and are past the ...
The table is not a nested table, temporary table, external table, materialized view, Advanced Query (AQ) table, or non-table object. The table contains neither LONG nor nested columns. The table does not use any of these Flashback Data Archive reserved words as column names: ...
-- Commands to re-create incarnation table -- Below log names MUST be changed to existing filenames on -- disk. Any one log file from each branch can be used to -- re-create incarnation records. -- ALTER DATABASE REGISTER LOGFILE 'D:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\TRNG2\...
In previous releases, a background checkpoint could fail if the system was waiting on an epoch. This would cause excess log records to accumulate. In this release, TimesTen retries the background checkpoint as soon as possible. (BugDB #28931970 - Forward Port of BugDB #29039498) ...
Subsequent SQL statements can query for records with a time selection component, which will use the values in the temporal validity columns. The temporal validity functionality uses Flashback mechanisms for implementation, which are described in Chapter 8. Other Datatypes Aside from the basic character...