Metadata of Table/Index

1. Using the import/export is one method of getting the metadata where while exporting row=n will be defined and while importing show=y should be provide but we need to lot of editing to get formated metadata but most easiest and quick one is using DMBS_METADATA

Export/Import
c:\>exp file=motoexp.dmp log=motoexp.log rows=n buffer=1000000
c:\>imp file=motoexp.dmp log=motoim.log show=y rows=n indexfile=moto.sql buffer=1000000

DBMS_METADATA
SELECT DBMS_METADATA.get_ddl('object_type','object_name','owner') from dual;

SQL> set serveroutput on
SQL> set long 10000
SQL> set pages 0
SQL> select DBMS_METADATA.get_ddl ('TABLE','JOBS','HR') from dual;

CREATE TABLE "HR"."JOBS" ( "JOB_ID" VARCHAR2(10),
"JOB_TITLE" VARCHAR2(35) CONSTRAINT "JOB_TITLE_NN" NOT NULL ENABLE, "MIN_SALARY" NUMBER(6,0),
"MAX_SALARY" NUMBER(6,0),
CONSTRAINT "JOB_ID_PK" PRIMARY KEY ("JOB_ID")
USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "EXAMPLE" ENABLE )
PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "EXAMPLE"

Find all indexes on a particular table using DBMS_METADATA

SQL> select DBMS_METADATA.get_dependent_ddl('INDEX','JOBS','HR') from dual;

CREATE UNIQUE INDEX "HR"."JOB_ID_PK" ON "HR"."JOBS" ("JOB_ID") PCTFREE 10 INITRANS 2 MAXTRANS 255 STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "EXAMPLE"

Find all referencial constraint on a table

SQL> select DBMS_METADATA.get_dependent_dd ('REF_CONSTRAINT','EMPLOYEES','HR') from dual;

ALTER TABLE "HR"."EMPLOYEES" ADD CONSTRAINT "EMP_DEPT_FK" FOREIGN KEY ("DEPARTMENT_ID") REFERENCES "HR"."DEPARTMENTS" ("DEPARTMENT_ID") ENABLE
ALTER TABLE "HR"."EMPLOYEES" ADD CONSTRAINT "EMP_JOB_FK" FOREIGN KEY ("JOB_ID") REFERENCES "HR"."JOBS" ("JOB_ID") ENABLE
ALTER TABLE "HR"."EMPLOYEES" ADD CONSTRAINT "EMP_MANAGER_FK" FOREIGN KEY ("MANAGER_ID") REFERENCES "HR"."EMPLOYEES" ("EMPLOYEE_ID") ENABLE

Find granted privileges for a particual schema using DBMS_METADATA

SQL> select DBMS_METADATA.get_granted_ddl('SYSTEM_GRANT','HR') from dual;
GRANT UNLIMITED TABLESPACE TO "HR"

SQL> select DBMS_METADATA.get_granted_ddl('ROLE_GRANT','HR') from dual;
GRANT "CONNECT" TO "HR"
GRANT "RESOURCE" TO "HR"

SQL> select DBMS_METADATA.get_granted_ddl('OBJECT_GRANT','HR') from dual;
GRANT EXECUTE ON "SYS"."DBMS_STATS" TO "HR"

ORA-00230: operation disallowed: snapshot control file enqueue unavailable

To determine which job is holding the conflicting enqueue.

SELECT s.sid, username AS "User", program, module,
action, logon_time "Logon", l.*
FROM v$session s, v$enqueue_lock l
WHERE l.sid = s.sid
and l.type = 'CF'
and l.id1 = 0
and l.id2 = 2;

SID User Program Module Action Logon
--- ---- -------------------- ------------------------- ---------------- ---------

- Wait until the job creating the enqueue completes
- Cancel the current job and restart it once the job creating the enqueue completes
- Cancel the job creating the enqueue

Query Tuning

xml requests going to the golden weblogic servlet aren't reaching the crossworlds servers- packets are coming out of the servlet however was stick on waiting for a response from crossworlds.

Application team was worried as query which was suppose to take 2-3 minutes was taking more than 30 mins to get executed.

Last analyzed is more than 3 months old

SQL> select OWNER, TABLE_NAME, LAST_ANALYZED from DBA_TABLES WHERE
TABLE_NAME='GD_INVOICE_HEADER';
OWNER TABLE_NAME LAST_ANAL------------------------------ ------------------------------ ---------GDCWODS GD_INVOICE_HEADER 12-JUL-09

SQL> select count(*) from GDCWODS.GD_INVOICE_DETAIL;
COUNT(*)
----------
1605055

SQL> select count(*) from GDCWODS.GD_INVOICE_HEADER;
COUNT(*)
----------
250578

Create Explain Plan Table:
SQL> @?/rdbms/admin/utlxplan.sql

Explain Plan for the query:
SQL> EXPLAIN PLAN SET STATEMENT_ID='GD_ISSUE' FOR
select * from GDCWODS.GD_INVOICE_HEADER IH where SYSTEM_ID='NA' AND BILL_TO_PARTY='500818'
AND EXISTS (SELECT MAT_NUMBER FROM GDCWODS.GD_INVOICE_DETAIL WHERE DOCNUM=IH.DOCNUM AND
MAT_NUMBER ='FA10003') ;

Explained.

SQL> @?/rdbms/admin/utlxpls GD_ISSUE
Plan Table
--------------------------------------------------------------------------------
Operation Name Rows Bytes Cost Pstart Pstop
--------------------------------------------------------------------------------
SELECT STATEMENT 47 20K 1632
FILTER
TABLE ACCESS FULL GD_INVOIC 47 20K 1632
TABLE ACCESS FULL GD_INVOIC 1 20 1769
--------------------------------------------------------------------------------

Columns which are Indexed earlier:

SQL> select INDEX_NAME, TABLE_NAME, COLUMN_NAME from dba_ind_columns where

TABLE_NAME='GD_INVOICE_HEADER' and TABLE_OWNER='GDCWODS';

INDEX_NAME TABLE_NAME
------------------------------ ------------------------------
COLUMN_NAME
-------------------------------------------------------------------------------------------

---------
GD_INV_HDR_IDX1 GD_INVOICE_HEADER
SYSTEM_ID

GD_INV_HDR_IDX1 GD_INVOICE_HEADER
DOCNUM


SQL> select INDEX_NAME, TABLE_NAME, COLUMN_NAME from dba_ind_columns where

TABLE_NAME='GD_INVOICE_DETAIL' and TABLE_OWNER='GDCWODS';

INDEX_NAME TABLE_NAME
------------------------------ ------------------------------
COLUMN_NAME
-------------------------------------------------------------------------------------------

---------
GD_INV_DET_IDX1 GD_INVOICE_DETAIL
SYSTEM_ID

GD_INV_DET_IDX1 GD_INVOICE_DETAIL
DOCNUM

GD_INV_DET_IDX1 GD_INVOICE_DETAIL
SEQNUM

EXPLAIN 2:( no change is cost)
SQL> EXPLAIN PLAN SET STATEMENT_ID='GD_ISSUE1' FOR
select * from GDCWODS.GD_INVOICE_HEADER IH
where SYSTEM_ID='NA' AND BILL_TO_PARTY='500818'
AND EXISTS (SELECT 1 FROM GDCWODS.GD_INVOICE_DETAIL WHERE DOCNUM=IH.DOCNUM AND MAT_NUMBER

='FA10003') ; 2 3 4

Explained.

SQL> @?/rdbms/admin/utlxpls GD_ISSUE1

Plan Table
--------------------------------------------------------------------------------
Operation Name Rows Bytes Cost Pstart Pstop
--------------------------------------------------------------------------------
SELECT STATEMENT 47 20K 1632
FILTER
TABLE ACCESS FULL GD_INVOIC 47 20K 1632
TABLE ACCESS FULL GD_INVOIC 1 20 1769
--------------------------------------------------------------------------------

7 rows selected.

EXPLAIN 3 using Hint: (cost got increased)
/// USING HINT ///
SQL> EXPLAIN PLAN SET STATEMENT_ID='GD_ISSUE2' FOR
2 select * from GDCWODS.GD_INVOICE_HEADER IH where SYSTEM_ID='NA' AND

BILL_TO_PARTY='500818' AND EXISTS (SELECT /*+ INDEX(GD_INVOICE_DETAIL GD_INV_DET_IDX1) */

MAT_NUMBER FROM GDCWODS.GD_INVOICE_DETAIL WHERE DOCNUM=IH.DOCNUM AND MAT_NUMBER ='FA10003')

;

Explained.

SQL> @?/rdbms/admin/utlxpls GD_ISSUE2

Plan Table
--------------------------------------------------------------------------------
Operation Name Rows Bytes Cost Pstart Pstop
--------------------------------------------------------------------------------
SELECT STATEMENT 47 20K 1632
FILTER
TABLE ACCESS FULL GD_INVOIC 47 20K 1632
TABLE ACCESS BY INDEX ROGD_INVOIC 1 20 5262
INDEX FULL SCAN GD_INV_DE 1 5261
--------------------------------------------------------------------------------

8 rows selected.

Created Index on MAT_NUMBER:
SQL> create index GD_INV_DET_MAT_NUM_IDX1 on GDCWODS.GD_INVOICE_DETAIL(MAT_NUMBER);

Index created.

EXPLAIN PLAN 4 : (after indexing cost reduced drastically)
SQL> EXPLAIN PLAN SET STATEMENT_ID='GD_ISSUE3' FOR
select * from GDCWODS.GD_INVOICE_HEADER IH where SYSTEM_ID='NA' AND BILL_TO_PARTY='500818'

AND EXISTS (SELECT MAT_NUMBER FROM GDCWODS.GD_INVOICE_DETAIL WHERE DOCNUM=IH.DOCNUM AND

MAT_NUMBER ='FA10003') ;
2
Explained.

SQL> @?/rdbms/admin/utlxpls GD_ISSUE3

Plan Table
--------------------------------------------------------------------------------
Operation Name Rows Bytes Cost Pstart Pstop
--------------------------------------------------------------------------------
SELECT STATEMENT 47 20K 1632
FILTER
TABLE ACCESS FULL GD_INVOIC 47 20K 1632
TABLE ACCESS BY INDEX ROGD_INVOIC 1 20 2
INDEX RANGE SCAN GD_INV_DE 1 1
--------------------------------------------------------------------------------

8 rows selected.

Note: For 16lakhs records will take at least 5-6hrs and 25thousand record will take 1-2hrs depeding on cpu, memory, colums, etc so analyze will be taken in off peak hours

coalesce

Coalescing the tablespace will NEVER increase the the amount of free space.

It is used on dictionary managed tablespaces to coalesce two or more adjacent FREE extents into one - it will NOT create new free ones.

DP RMAN Script for Archivelog backup

DP-RMAN Script for Archivelog backup

run
{allocate channel 'dev_0' type 'sbt_tape'
parms 'ENV=(OB2BARTYPE=Oracle8,OB2APPNAME=Database,OB2BARLIST=Server_Database_RMAN_ARC_ST_RA)'; sql 'alter system switch logfile';
crosscheck archivelog all;
backup format 'Server_Database_RMAN_ARC_ST_RA.arc'
archivelog all delete input;
}

*Crosscheck archivelog all was added to avoid backup failure due to missing archive files.

Ora-1461 Encountered When Generating Server Alert Smg-3500

1. To fix these Bug 6085625 and unpublished bug 6452485, The fixes for these two bugs are now available as Patch 6602742 or Patch 6602482 .

2. Workaround
A. Flushing the shared pool can help remove the problem cursor from the shared pool.
B. Using SESSION_CACHED_CURSORS = 0

Snapshot Purging

Recently we had to purge the snapshot as we were getting threshold alert. But Purging did not brought down the usage. Inorder to reduce threshold we had to resize the datafile of the perfstat.



When sppurge.sql is executed, all available snapshots are displayed and prompts for losnapid (low snap id ) & hisnapid (hi snap id). All snapshots between these will be deleted.




Purging requires large rollback segment. Commit command or exiting from sql will automatically commit the purging.




You can set the transaction to use particular rollback segment. Also exporting perfstat schema will ideal before purging, truncation or dropping.



SQL> @$ORACLE_HOME/rdbms/admin/sppurge




SQL > delete from stats$snapshot where snap_id <>


SQL > delete from stats$sql_summary where snap_time <>


Batch file


#!/bin/ksh

ORACLE_SID=$1

export ORACLE_SID

ORACLE_HOME=`cat /etc/oratabgrep ^$ORACLE_SID:cut -f2 -d':'

`export ORACLE_HOME

PATH=$ORACLE_HOME/bin:$PATH

export PATH

$ORACLE_HOME/bin/sqlplus system/manager<

select * from v$database;

connect perfstat/perfstat

define losnapid=$2

define hisnapid=$3

@sppurge

exit!

DICTIONARY VIEWS

DBA Views
SQL> SELECT * FROM DICT WHERE TABLE_NAME LIKE 'DBA_%' ORDER BY TABLE_NAME;
Dynamic views
SELECT * FROM DICT WHERE TABLE_NAME LIKE 'V$%' ORDER BY TABLE_NAME
All views
SQL> SELECT * FROM DICT WHERE TABLE_NAME LIKE 'ALL_%' ORDER BY TABLE_NAME;
User views
SQL> SELECT * FROM DICT WHERE TABLE_NAME LIKE 'USER_%' ORDER BY TABLE_NAME;

ANALYZED

Analyzed failed with following error out of 2700 tables 2200 odd got analyzed
ERROR at line 1:
ORA-12801: error signaled in parallel query server P052
ORA-08103: object no longer exists
ORA-06512: at "SYS.DBMS_STATS", line 10070
ORA-06512: at "SYS.DBMS_STATS", line 10564
ORA-06512: at "SYS.DBMS_STATS", line 10751
ORA-06512: at "SYS.DBMS_STATS", line 10805
ORA-06512: at "SYS.DBMS_STATS", line 10782
ORA-06512: at line 1

This is known issue in earlier version of oracle 9i when estimate was used instead of compute while gathering statistics using GATHER_SCHEMA_STATS/GATHER_DATABASE_STATS command. Although it was claimed to be fixed in 9.2.0.20 i faced problem in 9.2.0.6.0 while estimating whereas compute worked great.



Analyze query:



Select OWNER,TABLE_NAME,
to_char(LAST_ANALYZED,'MM/DD/YYYY HH24:MI:SS') "last_analyzed"
from dba_tab_columns
where OWNER not in ('SYS','SYSTEM')
and LAST_ANALYZED is not null
and COLUMN_ID=1
and (SYSDATE-LAST_ANALYZED) <>



Simple analyze job script :



#!/bin/sh# Script:

analyze_only.sh

#

# Description: Analyze Database.
# Set the variables

ORACLE_SID=

ORACLE_BASE=

ORACLE_HOME=

LD_LIBRARY_PATH=$ORACLE_HOME/lib

PATH=$PATH:$ORACLE_HOME/bin

export ORACLE_SID ORACLE_HOME PATH LD_LIBRARY_PATH


date


# Analyze Databasesqlplus -s "/ as sysdba" <<>

set echo off

set feedback off

set heading off

set pagesi 0

set linesize 125

spool analyze_all_output.lst

execute DBMS_STATS.GATHER_SCHEMA_STATS ownname=>'',cascade=>TRUE);

select '-----------------------------------------------------------' from dual;

select ' TABLE_NAME LAST ANALYZED ' from dual;

select '-----------------------------------------------------------' from dual;

select table_name, to_char(last_analyzed, 'DD-MON-YY HH24:MI:SS') from dba_tables where OWNER='' ORDER by table_name;

select '---------------------End of List--------------------------------------' from dual;

select '-----------------------------------------------------------' from dual;

select ' INDEX_NAME LAST ANALYZED ' from dual;

select '-----------------------------------------------------------' from dual;

select index_name, to_char(last_analyzed, 'DD-MON-YY HH24:MI:SS') from dba_indexes where OWNER='' ORDER by index_name;

select '---------------------End of List--------------------------------------' from dual;

exit

EOF
ANALYZELOG="analyze_all_output.lst"

oraerr='cat $ANALYZELOGgrep ORA-wc -l'

if [ $oraerr -gt 0 ]
then echo "Status as on 'date' : Analyze Failed" >> "analyze_all_output.lst"

sqlplus /nolog <

conn aa/bb@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=xx.xx.xx.xx)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME= xxx)))

insert into bkpstats (BKPDATE,SERVER,SRVRIP,DBNAME,BKPTYPE,BKPSTATS) values (SYSDATE,'','','','DB ANALYZE','JOB FAILED');

commit;
EOF
exit;

else

echo "Status as on 'date' : Analyze Successfull" >> "analyze_all_output.lst"
sqlplus /nolog <<>aa/bb@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=xx.xx.xx.xx)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME= xxx)))

insert into bkpstats (BKPDATE,SERVER,SRVRIP,DBNAME,BKPTYPE,BKPSTATS) values (SYSDATE,'','','','DB ANALYZE','JOB SUCCESSFUL');

commit;
EOF
exit;

fi

mailx -s "$ORACLE_SID Analyze is complete." "xx@xx.com,yy@yy.com" < $ date

RMAN CROSSCHECK

CROSSCHECK command verifies if the object available or expired by examining the file in disk or sbt. CROSSCHECK does not delete files that it does not find. It only updates the repository.

Following error registered in log file while it failed to find the controlfile during scheduled backup

Error message:
RMAN-06207: WARNING: 1 objects could not be deleted for DISK channel(s) due
RMAN-06208: to mismatched status. Use CROSSCHECK command to fix status
List of Mismatched objects
==========================
Object Type Filename/Handle
--------------- ---------------------------------------------------
Datafile Copy C:\PROGRAM FILES\OMNIBACK\TMP\CTRL_ODPI.DBF

Examples to crosscheck:

RMAN> CROSSCHECK CONTROFILE;
RMAN> CROSSCHECK BACKUP;
RMAN> CROSSCHECK COPY;
RMAN> CROSSCHECK backup of database;
RMAN> CROSSCHECK backup of controlfile;
RMAN> CROSSCHECK archivelog all;

Query media manager
SBT
RMAN> ALLOCATE CHANNEL FOR MAINTENANCE DEVICE TYPE sbt;
RMAN> CROSSCHECK BACKUP DEVICE TYPE sbt COMPLETED BETWEEN '01-MAY-09' AND '30-JUNE-09';

DISK
RMAN> CROSSCHECK BACKUP DEVICE TYPE DISK COMPLETED BETWEEN '01-MAY-09' AND '30-JUNE-09';

For default channel below command can be used
RMAN> CROSSCHECK BACKUP COMPLETED BETWEEN '01-MAY-09' AND '30-JUNE-09';

Listener

How to Check If the Password is Set to Listener:

From the listener control prompt, issue the command STATUS. If the Security setting is shown as ON, then the password is set for the listener.


LSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ANANDA)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 9.2.0.1.0 - Production
Start Date 05-JUL-2003 15:23:19
Uptime 0 days 6 hr. 24 min. 56 sec
Trace Level off
Security ON
SNMP OFF
Listener Parameter File d:\ora9\network\admin\listener.ora
Listener Log File d:\ora9\network\log\listener.log
Services Summary...
ANANDA has 1 service handler(s)
ANANDA has 2 service handler(s)
ANANDA has 2 service handler(s)
The command completed successfully
LSNRCTL>

Once password is set any administrative command apart from START, STATUS and HELP require password. It's the least security. Password is set by command change_password

LSNRCTL>change_password

Set password for administrative task

LSNRCTL> set password 607CB