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dba_log_groups Tips

Oracle Database Tips by Donald BurlesonNovember 13, 2015


dba_log_groups Tips

This view describes the log group definitions on the tables in the database. The following statement can be used to list the supplemental log groups:

set linesize 140
COLUMN  log_group_name FORMAT A30
COLUMN  owner          FORMAT A24
COLUMN  table_name     FORMAT A30
COLUMN  always HEADING 'Type of Log Group' FORMAT A30


SELECT  log_group_name, owner, table_name,
DECODE(always, 'ALWAYS', 'Unconditional',
                NULL, 'Conditional') ALWAYS

The contents of this view show the supplemental logging configured. This information helps to troubleshoot apply issues.


This view describes all columns in the database that are specified in log groups.

For example, to query the columns in the group ALLINS1_LOG_GRP1, use the following SQL statement:

col OWNER for a8
col LOG_GROUP_NAME for a20
col TABLE_NAME for a20
col COLUMN_NAME for a12   

select *

Log group definitions on all tables
OWNER 		VARCHAR2 	Owner of the table
LOG_GROUP_NAME 	VARCHAR2 	Name associated with log group definition
ALWAYS 		VARCHAR2 	Is this an ALWAYS or a CONDITIONAL supplemental log group?
GENERATED 	VARCHAR2 	Was the name of this supplemental log group system generated?

Information about columns in log group definitions
OWNER 		VARCHAR2 	Owner of the log group definition
LOG_GROUP_NAME 	VARCHAR2 	Name associated with the log group definition
TABLE_NAME 	VARCHAR2 	Name associated with table with log group definition
COLUMN_NAME 	VARCHAR2	Name associated with column or attribute of object column specified in the 
                                                                log group definition
POSITION 		NUMBER 	                Original position of column or attribute in definition
LOGGING_PROPERTY 	VARCHAR2 	Whether the column or attribute would be supplementally logged


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