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Oracle Distributed Systems
book

Oracle Distributed Systems

by Charles Dye
April 1999
Intermediate to advanced content levelIntermediate to advanced
552 pages
15h 39m
English
O'Reilly Media, Inc.
Content preview from Oracle Distributed Systems

Name

DBMS_SNAPSHOT.PURGE_LOG

Synopsis

Call the PURGE_LOG procedure to delete snapshot log records.

PROCEDURE DBMS_SNAPSHOT.PURGE_LOG
   (master VARCHAR2,
    num BINARY_INTEGER DEFAULT 1,
    flag VARCHAR2 DEFAULT 'NOP' );

To delete all records from a snapshot log, set the num parameter to a high value (greater than the number of snapshots mastered to the master table, specified in the master parameter).

The PURGE_LOG procedure does not raise any exceptions, and there are no restrictions on calling it.

Parameters

Parameter Name

Description

master

Name of the master table.

num

Delete records required to refresh the oldest number of unrefreshed snapshot; default is 1.

flag

Set to DELETE to guarantee that records are deleted for at least one snapshot regardless of the setting of num.

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Publisher Resources

ISBN: 1565924320Supplemental ContentCatalog PageErrata