The easiest way to examine the modification history of a database is to mine at the source database and use the online catalog to translate the redo log files. This example shows how to do the simplest analysis using LogMiner.
This example finds all modifications that are contained in the last archived redo log generated by the database (assuming that the database is not an Oracle Real Application Clusters (Oracle RAC) database).
This example assumes that you know you want to mine the redo log file that was most recently archived.
SELECT NAME FROM V$ARCHIVED_LOG WHERE FIRST_TIME = (SELECT MAX(FIRST_TIME) FROM V$ARCHIVED_LOG); NAME ------------------------------------------- /usr/oracle/data/db1arch_1_16_482701534.dbf
Specify the redo log file that was returned by the query in Step 1. The list will consist of one redo log file.
EXECUTE DBMS_LOGMNR.ADD_LOGFILE( - LOGFILENAME => '/usr/oracle/data/db1arch_1_16_482701534.dbf', - OPTIONS => DBMS_LOGMNR.NEW);
Start LogMiner and specify the dictionary to use.
EXECUTE DBMS_LOGMNR.START_LOGMNR( - OPTIONS => DBMS_LOGMNR.DICT_FROM_ONLINE_CATALOG);
Note that there are four transactions (two of them were committed within the redo log file being analyzed, and two were not). The output shows the DML statements in the order in which they were executed; thus transactions interleave among themselves.
SELECT username AS USR, (XIDUSN || '.' || XIDSLT || '.' || XIDSQN) AS XID,
SQL_REDO, SQL_UNDO FROM V$LOGMNR_CONTENTS WHERE username IN ('HR', 'OE');
USR XID SQL_REDO SQL_UNDO
---- --------- ----------------------------------------------------
HR 1.11.1476 set transaction read write;
HR 1.11.1476 insert into "HR"."EMPLOYEES"( delete from "HR"."EMPLOYEES"
"EMPLOYEE_ID","FIRST_NAME", where "EMPLOYEE_ID" = '306'
"LAST_NAME","EMAIL", and "FIRST_NAME" = 'Nandini'
"PHONE_NUMBER","HIRE_DATE", and "LAST_NAME" = 'Shastry'
"JOB_ID","SALARY", and "EMAIL" = 'NSHASTRY'
"COMMISSION_PCT","MANAGER_ID", and "PHONE_NUMBER" = '1234567890'
"DEPARTMENT_ID") values and "HIRE_DATE" = TO_DATE('10-JAN-2012
('306','Nandini','Shastry', 13:34:43', 'dd-mon-yyyy hh24:mi:ss')
'NSHASTRY', '1234567890', and "JOB_ID" = 'HR_REP' and
TO_DATE('10-jan-2012 13:34:43', "SALARY" = '120000' and
'dd-mon-yyyy hh24:mi:ss'), "COMMISSION_PCT" = '.05' and
'HR_REP','120000', '.05', "DEPARTMENT_ID" = '10' and
'105','10'); ROWID = 'AAAHSkAABAAAY6rAAO';
OE 1.1.1484 set transaction read write;
OE 1.1.1484 update "OE"."PRODUCT_INFORMATION" update "OE"."PRODUCT_INFORMATION"
set "WARRANTY_PERIOD" = set "WARRANTY_PERIOD" =
TO_YMINTERVAL('+05-00') where TO_YMINTERVAL('+01-00') where
"PRODUCT_ID" = '1799' and "PRODUCT_ID" = '1799' and
"WARRANTY_PERIOD" = "WARRANTY_PERIOD" =
TO_YMINTERVAL('+01-00') and TO_YMINTERVAL('+05-00') and
ROWID = 'AAAHTKAABAAAY9mAAB'; ROWID = 'AAAHTKAABAAAY9mAAB';
OE 1.1.1484 update "OE"."PRODUCT_INFORMATION" update "OE"."PRODUCT_INFORMATION"
set "WARRANTY_PERIOD" = set "WARRANTY_PERIOD" =
TO_YMINTERVAL('+05-00') where TO_YMINTERVAL('+01-00') where
"PRODUCT_ID" = '1801' and "PRODUCT_ID" = '1801' and
"WARRANTY_PERIOD" = "WARRANTY_PERIOD" =
TO_YMINTERVAL('+01-00') and TO_YMINTERVAL('+05-00') and
ROWID = 'AAAHTKAABAAAY9mAAC'; ROWID ='AAAHTKAABAAAY9mAAC';
HR 1.11.1476 insert into "HR"."EMPLOYEES"( delete from "HR"."EMPLOYEES"
"EMPLOYEE_ID","FIRST_NAME", "EMPLOYEE_ID" = '307' and
"LAST_NAME","EMAIL", "FIRST_NAME" = 'John' and
"PHONE_NUMBER","HIRE_DATE", "LAST_NAME" = 'Silver' and
"JOB_ID","SALARY", "EMAIL" = 'JSILVER' and
"COMMISSION_PCT","MANAGER_ID", "PHONE_NUMBER" = '5551112222'
"DEPARTMENT_ID") values and "HIRE_DATE" = TO_DATE('10-jan-2012
('307','John','Silver', 13:41:03', 'dd-mon-yyyy hh24:mi:ss')
'JSILVER', '5551112222', and "JOB_ID" ='105' and "DEPARTMENT_ID"
TO_DATE('10-jan-2012 13:41:03', = '50' and ROWID = 'AAAHSkAABAAAY6rAAP';
'dd-mon-yyyy hh24:mi:ss'),
'SH_CLERK','110000', '.05',
'105','50');
OE 1.1.1484 commit;
HR 1.15.1481 set transaction read write;
HR 1.15.1481 delete from "HR"."EMPLOYEES" insert into "HR"."EMPLOYEES"(
where "EMPLOYEE_ID" = '205' and "EMPLOYEE_ID","FIRST_NAME",
"FIRST_NAME" = 'Shelley' and "LAST_NAME","EMAIL","PHONE_NUMBER",
"LAST_NAME" = 'Higgins' and "HIRE_DATE", "JOB_ID","SALARY",
"EMAIL" = 'SHIGGINS' and "COMMISSION_PCT","MANAGER_ID",
"PHONE_NUMBER" = '515.123.8080' "DEPARTMENT_ID") values
and "HIRE_DATE" = TO_DATE( ('205','Shelley','Higgins',
'07-jun-1994 10:05:01', and 'SHIGGINS','515.123.8080',
'dd-mon-yyyy hh24:mi:ss') TO_DATE('07-jun-1994 10:05:01',
and "JOB_ID" = 'AC_MGR' 'dd-mon-yyyy hh24:mi:ss'),
and "SALARY"= '12000' 'AC_MGR','12000',NULL,'101','110');
and "COMMISSION_PCT" IS NULL
and "MANAGER_ID"
= '101' and "DEPARTMENT_ID" =
'110' and ROWID =
'AAAHSkAABAAAY6rAAM';
OE 1.8.1484 set transaction read write;
OE 1.8.1484 update "OE"."PRODUCT_INFORMATION" update "OE"."PRODUCT_INFORMATION"
set "WARRANTY_PERIOD" = set "WARRANTY_PERIOD" =
TO_YMINTERVAL('+12-06') where TO_YMINTERVAL('+20-00') where
"PRODUCT_ID" = '2350' and "PRODUCT_ID" = '2350' and
"WARRANTY_PERIOD" = "WARRANTY_PERIOD" =
TO_YMINTERVAL('+20-00') and TO_YMINTERVAL('+20-00') and
ROWID = 'AAAHTKAABAAAY9tAAD'; ROWID ='AAAHTKAABAAAY9tAAD';
HR 1.11.1476 commit;
SQL> EXECUTE DBMS_LOGMNR.END_LOGMNR();