Database Administrator

Tuesday, May 8, 2012

Oracle 11g2 Database Replay

Oracle 11g2 Database Replay Features

Before system changes are made, such as hardware and software upgrades, extensive testing is usually performed in a test environment to validate the changes. However, despite the testing, the new system often experiences unexpected behavior when it enters production because the testing was not performed using a realistic workload. The inability to simulate a realistic workload during testing is one of the biggest challenges when validating system changes

Database Replay enables realistic testing of system changes by essentially re-creating the production workload environment on a test system. Using Database Replay, you can capture a workload on the production system and replay it on a test system with the exact timing, concurrency, and transaction characteristics of the original workload. This enables you to fully assess the impact of the change, including undesired results, new contention points, or plan regressions. Extensive analysis and reporting is provided to help identify any potential problems, such as new errors encountered and performance divergence.

Database Replay performs workload capture of external client workload at the database level and has negligible performance overhead. Capturing the production workload eliminates the need to develop simulation workloads or scripts, resulting in significant cost reduction and time savings. By using Database Replay, realistic testing of complex applications that previously took months using load simulation tools can now be completed in days. This enables you to rapidly test changes and adopt new technologies with a higher degree of confidence and at lower risk.

You can use Database Replay to test any significant system changes, including:

Database and operating system upgrades

Configuration changes, such as conversion of a database from a single instance to an Oracle Real Application Clusters (Oracle RAC) environment

Storage, network, and interconnect changes

Operating system and hardware migrations

You can use Database Replay to capture a workload on the production system and replay it on a test system with the exact timing, concurrency, and transaction characteristics of the original workload. This enables you to test the effects of a system change without affecting the production system.

Database Replay supports workload capture on a system running Oracle Database 10g Release 2 and newer releases. In order to capture a workload on a system running Oracle Database 10g Release 2, the database version can be 10.2.0.4 or higher. Workload replay is only supported on systems running Oracle Database 11g Release 1 and newer releases.

Before capturing a database workload, carefully consider the following options:

*Restarting the Database

–to avoid capture partial transaction

*Defining the Workload Filters

–inclusion filters or exclusion filters, not both

*Setting Up the Capture Directory

Oracle 11g2 Database Replay Steps
Create Tablespace “USERS”   SQL>CREATE TABLESpace users DATAFILE ‘/u01/oracle/dbdata/tstd11s/data/user01.dbf’ size 500m autoextend on maxsize 1g;  Create DIRECTORY to store Replay related files.
SQL>CREATE OR REPLACE DIRECTORY dbreplay_capture_dir AS ‘/u01/oracle/dbdata/dbreplay_capture/’;  Start Capture process
SQL>
BEGIN
DBMS_WORKLOAD_CAPTURE.start_capture (name     => ‘tst_capture_7′,
                                       dir      => ‘dbreplay_CAPTURE_DIR’,                                       duration => NULL);
END;
/  These below activities will be capture in replay process
SQL>CREATE USER dbreplay_test IDENTIFIED BY dbreplay_test QUOTA UNLIMITED ON users;SQL>GRANT CONNECT, CREATE TABLE TO dbreplay_test;SQL>CONN dbreplay_test/dbreplay_test
SQL>CREATE TABLE dbreplay_test_tab (   id           NUMBER,
description VARCHAR2(50), CONSTRAINT dbreplay_test_tab_pk PRIMARY KEY (id)
) tablespace users;
SQL>
BEGIN FOR i IN 1 .. 100000 LOOP    INSERT INTO dbreplay_test_tab (id, description)    VALUES (i, ‘Description for ‘ || i);
END LOOP; COMMIT;
END;
/ To stop the replay process
SQL>CONN / AS SYSDBA
SQL>
BEGIN DBMS_WORKLOAD_CAPTURE.finish_capture;
END;
/
To find a Capture ID, Name
SQL>conn / as sysdbaSQL> SELECT DBMS_WORKLOAD_CAPTURE.get_capture_info(‘dbreplay_CAPTURE_DIR’)
FROM   dual;
DBMS_WORKLOAD_CAPTURE.GET_CAPTURE_INFO(‘dbreplay_CAPTURE_DIR’)
—————————————————————                                                             8
SQL> COLUMN name FORMAT A30
SELECT id, name FROM dba_workload_captures;         8 tst_capture_7
To get report
DECLARE
l_report CLOB;
BEGIN
l_report := DBMS_WORKLOAD_CAPTURE.report(capture_id => 8,format    => DBMS_WORKLOAD_CAPTURE.TYPE_HTML);
END;

Monday, May 7, 2012

Table Reorganization, Rebuild

Tables in Oracle database become fragmented after mass deletion, or after so many delete and/or insert operations.

BEGIN
FOR cur_rec IN (SELECT distinct table_name
FROM dba_tables WHERE OWNER NOT in ('DBSNMP','ORACLE_OCM','OUTLN','SYS','SYSMAN','SYSTEM','TSMSYS','WMSYS','XDB','SYSMAN')) LOOP
BEGIN
EXECUTE IMMEDIATE 'ALTER TABLE '|| cur_rec.table_name ||' ENABLE ROW MOVEMENT';
EXECUTE IMMEDIATE 'ALTER TABLE '|| cur_rec.table_name ||' SHRINK SPACE COMPACT';
EXECUTE IMMEDIATE 'ALTER TABLE '|| cur_rec.table_name ||' SHRINK SPACE';
EXECUTE IMMEDIATE 'ALTER TABLE '|| cur_rec.table_name ||' DISABLE ROW MOVEMENT';
EXECUTE IMMEDIATE 'ANALYZE TABLE '|| cur_rec.table_name ||' COMPUTE STATISTICS';
EXCEPTION
WHEN OTHERS THEN
NULL;
END;
END LOOP;
FOR cur_rec IN (SELECT distinct index_name
FROM dba_indexes) LOOP
BEGIN
EXECUTE IMMEDIATE 'ALTER INDEX '|| cur_rec.index_name ||' REBUILD' ;
EXECUTE IMMEDIATE 'ANALYZE INDEX '|| cur_rec.index_name ||' COMPUTE STATISTICS' ;
EXCEPTION
WHEN OTHERS THEN
NULL;
END;
END LOOP;
BEGIN
SYS.UTL_RECOMP.recomp_serial('LDBO');
END;
END;
/

Friday, May 4, 2012

Purge Queue Table

BEGIN
FOR cur_rec IN (SELECT owner,queue_table FROM dba_queue_tables where owner not in ('DBSNMP','ORACLE_OCM','OUTLN','SYS','SYSMAN','SYSTEM','TSMSYS','WMSYS','XDB')) LOOP
DECLARE
po_t dbms_aqadm.aq$_purge_options_t;
BEGIN
DBMS_AQADM.PURGE_QUEUE_TABLE('' || cur_rec.owner || '' || '.' || '' || cur_rec.queue_table || '', NULL, po_t);
END;
END LOOP;
END;
/

----------------Schema Tables---------

BEGIN

FOR cur_rec IN (SELECT queue_table FROM user_queue_tables) LOOP

DECLARE

po_t dbms_aqadm.aq$_purge_options_t;

BEGIN

DBMS_AQADM.PURGE_QUEUE_TABLE('' || cur_rec.queue_table || '', NULL, po_t);

END;

END LOOP;

END;

------------Purge Specific Table

BEGIN

FOR cur_rec IN (SELECT queue_table FROM user_queue_tables) LOOP

DECLARE

po_t dbms_aqadm.aq$_purge_options_t;

BEGIN

DBMS_AQADM.PURGE_QUEUE_TABLE('TBLRKQUEUE', NULL, po_t);

EXCEPTION

WHEN OTHERS THEN

NULL;

END;

END LOOP;

END;

Drop All Database Objects

BEGIN
FOR cur_rec IN (SELECT table_owner, table_name, constraint_name FROM dba_constraints
WHERE constraint_type = 'R' and table_owner not in ('DBSNMP','ORACLE_OCM','OUTLN','SYS','SYSMAN','SYSTEM','TSMSYS','WMSYS','XDB')) LOOP
EXECUTE IMMEDIATE 'ALTER TABLE ' || cur_rec.table_owner|| '.' || cur_rec.table_name || ' DROP CONSTRAINT ' || cur_rec.constraint_name;
END LOOP;
FOR cur_rec IN (SELECT owner, object_name, object_type
FROM dba_objects where owner not in ('DBSNMP','ORACLE_OCM','OUTLN','SYS','SYSMAN','SYSTEM','TSMSYS','WMSYS','XDB')) LOOP
BEGIN
EXECUTE IMMEDIATE 'DROP ' || cur_rec.owner|| '.' || cur_rec.object_type || ' ' || cur_rec.object_name;
EXCEPTION
WHEN OTHERS THEN
NULL;
END;
END LOOP;
FOR cur_rec IN (SELECT owner,synonym_name,table_owner FROM dba_synonyms where table_owner not in ('DBSNMP','ORACLE_OCM','OUTLN','SYS','SYSMAN','SYSTEM','TSMSYS','WMSYS','XDB')) LOOP
BEGIN
EXECUTE IMMEDIATE 'DROP ' || cur_rec.owner || ' SYNONYM ' || cur_rec.table_owner || '.' || cur_rec.synonym_name || ' FORCE';
EXCEPTION
WHEN OTHERS THEN
NULL;
END;
END LOOP;
FOR cur_rec IN (SELECT owner, queue_table FROM dba_queue_tables where owner not in ('DBSNMP','ORACLE_OCM','OUTLN','SYS','SYSMAN','SYSTEM','TSMSYS','WMSYS','XDB')) LOOP
BEGIN
DBMS_AQADM.DROP_QUEUE_TABLE('' || cur_rec.owner || '' || '.' || '' || cur_rec.queue_table || '',force =>true);
EXCEPTION
WHEN OTHERS THEN
NULL;
END;
END LOOP;
END;
/

Track User password change Audit Activity

if you want to track password change or other activity with sql then

ALTER SYSTEM SET AUDIT_TRAIL=DB_EXTENDED SCOPE=SPFILE;

THERE IS SQL_TEXT COLUMN IN DBA_AUDIT_TRAIL VIEW.

Thursday, May 3, 2012

Foxpro Error Error building key for index Operation is invalid for a Memo, Blob, General or Picture field.

Problem :

System Run time Error messages :

Error building key for index "c:\docume~1\admini~1\locals~1\temp\0000yqe1000z.cdx" tag "Clrisk".

Operation is invalid for a Memo, Blob, General or Picture field.

Solution :

Alter system set cursor_sharing=exact scope=both ;

Foxpro Error: Operation is invalid for a Memo, Blob, General or Picture field.

Error: Operation is invalid for a Memo, Blob, General or Picture field
Message: Foxcode table not found, is not correct version or is incompatible.
METHOD: beforeopentables
PROGRAM: frmCheckerCreateUser

There may be following reasons for above error

1) An INDEX command cannot specify a Memo or Blob field as its key expression.

2) There was not enough memory (shared pool) for Visual FoxPro to complete an operation.

3) Unions between differing column types are not allowed when one of the columns is of Memo or General type unless UNION ALL is used.

4) Visual FoxPro cannot update the specified cursor because it is read-only. This can occur when attempting to write to a file created or accessed for read-only purposes.

Solution;

CURSOR_SHARING (Default value: Exact): Share the plan only if text of SQL matches exactly with the text of SQL lying in shared pool.

Sqlplus>show parameter cursor_sharing

Exact is the default value for cursor_sharing.

Sqlplus>ALTER SYSTEM SET cursor_sharing='EXACT';

-- verify default value of EXACT
Sqlplus>show parameter cursor_sharing

-- clear all cached SQL statements
Sqlplus>ALTER SYSTEM FLUSH SHARED_POOL;
Sqlplus>ALTER SYSTEM FLUSH SHARED_POOL;

Wednesday, May 2, 2012

Oracle 11g Embed Text to Sound translator

CREATE TABLE EMP (EMPNO VARCHAR2(10),ENAME VARCHAR2(20), SAL VARCHAR2(10), JOB VARCHAR2(10) ,HIREDATE DATE,DEPTNO VARCHAR2(10));

INSERT INTO EMP VALUES('10','KSHITIJ','100','DBA','01-DEC-2011','12');
COMMIT;

------------------------------------------------------------------------------------------------

begin
dbms_network_acl_admin.create_acl (
acl => 'utlpkg.xml',
description => 'Normal Access',
principal => 'CONNECT',
is_grant => TRUE,
privilege => 'connect',
start_date => null,
end_date => null
);
dbms_network_acl_admin.add_privilege (
acl => 'utlpkg.xml',
principal => 'DPCDSL',
is_grant => TRUE,
privilege => 'connect',
start_date => null,
end_date => null);

DBMS_NETWORK_ACL_ADMIN.assign_acl (
acl => 'utlpkg.xml',
host => 'translate.google.com',
lower_port => 80,
upper_port => NULL);

COMMIT;
END;
/

--------------------------------------------------------------------------------------------------------------------------------
create or replace
package mytranslator
as

function getMP3
( p_text in varchar2
, p_language in varchar2 default 'en'
) return blob
;

procedure play_sound
( p_text in varchar2
);

procedure play_employee
( p_empno in number
, p_language in varchar2 default 'en'
);

procedure soundcheck;
end;
/

------------------

create or replace
package body mytranslator
as

function load_binary_from_url (p_url IN VARCHAR2)
return blob
AS
l_http_request UTL_HTTP.req;
l_http_response UTL_HTTP.resp;
l_blob BLOB;
l_raw RAW(32767);
BEGIN
-- Initialize the BLOB.
DBMS_LOB.createtemporary(l_blob, FALSE);
-- Make a HTTP request and get the response.
l_http_request := UTL_HTTP.begin_request(p_url);
l_http_response := UTL_HTTP.get_response(l_http_request);
-- Copy the response into the BLOB.
BEGIN
LOOP
UTL_HTTP.read_raw(l_http_response, l_raw, 32767);
DBMS_LOB.writeappend (l_blob, UTL_RAW.length(l_raw), l_raw);
END LOOP;
EXCEPTION
WHEN UTL_HTTP.end_of_body
THEN
UTL_HTTP.end_response(l_http_response);
end;
return l_blob;
end load_binary_from_url;

function getMP3
( p_text in varchar2
, p_language in varchar2 default 'en'
) return blob
is
l_base_url varchar2(2000):= 'http://translate.google.com/translate_tts?tl=';
begin
return load_binary_from_url
( p_url=> l_base_url||p_language||chr(38)||'q='
||utl_url.escape(p_text)
);
-- note: chr(38) is the ampersand
end getMP3;

procedure download_blob
( p_blob in out nocopy blob
) as
l_mime_type varchar2(30):= 'audio/mpeg';
l_blob_size number(10);
begin
l_blob_size := dbms_lob.getlength(p_blob);
owa_util.mime_header(l_mime_type, FALSE, NULL);
htp.p('Content-length: '|| l_blob_size);
owa_util.http_header_close;
-- download BLOB
wpg_docload.download_file(p_blob);
end download_blob;

procedure play_sound
( p_text in varchar2
) is
l_blob blob;
begin
l_blob:= getMP3 ( p_text);
download_blob (l_blob);
end play_sound;

procedure play_employee
( p_empno in number
, p_language in varchar2 default 'en'
) is
l_blob blob;
l_blob2 blob;
begin

l_blob:= getMP3 ( 'Details on Employee', p_language);

for emp in (select ename, sal, job, to_char(hiredate, 'MONTH YYYY') hireyear, deptno
from emp
where empno = p_empno
) loop
l_blob2:= getMP3 ( 'Employee is called '||emp.ename||' his job is '||emp.job, p_language);
DBMS_LOB.APPEND
( dest_lob => l_blob
, src_lob => l_blob2
);
l_blob2:= getMP3 ( 'He works in department '||emp.deptno||' and earns '||emp.sal||' dollar', p_language);
DBMS_LOB.APPEND
( dest_lob => l_blob
, src_lob => l_blob2
);
l_blob2:= getMP3 ( 'He was hired back in '||emp.hireyear, p_language);
DBMS_LOB.APPEND
( dest_lob => l_blob
, src_lob => l_blob2
);
end loop;

download_blob (l_blob);
exception
when others
then
l_blob:= getMP3 ( 'Exception occurred '||sqlerrm, p_language);
download_blob (l_blob);
end play_employee;

procedure soundcheck
is
l_blob blob;
space varchar2(4):='%20';
begin

l_blob:= getMP3 ( 'Test one two three test', p_language=> 'en');
download_blob (l_blob);
exception
when others
then
l_blob:= getMP3 ( 'Exception'||space||'occurred', p_language =>'en');
download_blob (l_blob);
end soundcheck;

end;

------------------

select mytranslator.getmp3('hello how r u what is your name. my name is john') from dual

select mytranslator.play_sound('hello how r u what is your name. my name is john') from dual

BEGIN
DBMS_EPG.create_dad
( dad_name => 'hrmreport'
, path => '/hrm/*'
);
DBMS_EPG.AUTHORIZE_DAD('hrmreport','DPCDSL');
end;
/

http://blog.mclaughlinsoftware.com/2009/12/01/oracle-11g-xdb-dads/

http://www.oracle-base.com/articles/10g/dbms_epg_10gR2.php

http://psoug.org/reference/dbms_epg.html

SELECT * FROM dba_epg_dad_authorization;

Friday, April 27, 2012

How to do FTP using PL SQL

How to do FTP using PL SQL

Load the attached FTP Package in Oracle. Once the API is loaded into the appropriate schema simple FTP commands can be initiated as follows:

CREATE OR REPLACE DIRECTORY my_docs AS '/u01/app/oracle/';
SET SERVEROUTPUT ON SIZE 1000000

http://www.oracle-base.com/dba/miscellaneous/ftp.pkb
http://www.oracle-base.com/dba/miscellaneous/ftp.pks

@c:\ftp.pks
@c:\ftp.pkb

-- Retrieve an ASCII file from a remote FTP server.
DECLARE
l_conn UTL_TCP.connection;
BEGIN
l_conn := ftp.login('ftp.company.com', '21', 'ftpuser', 'ftppassword');
ftp.ascii(p_conn => l_conn);
ftp.get(p_conn => l_conn,
p_from_file => '/u01/app/oracle/test.txt',
p_to_dir => 'MY_DOCS',
p_to_file => 'test_get.txt');
ftp.logout(l_conn);
END;
/

-- Send an ASCII file to a remote FTP server.
DECLARE
l_conn UTL_TCP.connection;
BEGIN
l_conn := ftp.login('ftp.company.com', '21', 'ftpuser', 'ftppassword');
ftp.ascii(p_conn => l_conn);
ftp.put(p_conn => l_conn,
p_from_dir => 'MY_DOCS',
p_from_file => 'test_get.txt',
p_to_file => '/u01/app/oracle/test_put.txt');
ftp.logout(l_conn);
END;
/

-- Retrieve a binary file from a remote FTP server.
DECLARE
l_conn UTL_TCP.connection;
BEGIN
l_conn := ftp.login('ftp.company.com', '21', 'ftpuser', 'ftppassword');
ftp.binary(p_conn => l_conn);
ftp.get(p_conn => l_conn,
p_from_file => '/u01/app/oracle/product/9.2.0.1.0/sysman/reporting/gif/jobs.gif',
p_to_dir => 'MY_DOCS',
p_to_file => 'jobs_get.gif');
ftp.logout(l_conn);
END;
/

-- Send a binary file to a remote FTP server.
DECLARE
l_conn UTL_TCP.connection;
BEGIN
l_conn := ftp.login('ftp.company.com', '21', 'ftpuser', 'ftppassword');
ftp.binary(p_conn => l_conn);
ftp.put(p_conn => l_conn,
p_from_dir => 'MY_DOCS',
p_from_file => 'jobs_get.gif',
p_to_file => '/u01/app/oracle/jobs_put.gif');
ftp.logout(l_conn);
END;
/

-- Get a directory listing from a remote FTP server.
DECLARE
l_conn UTL_TCP.connection;
l_list ftp.t_string_table;
BEGIN
l_conn := ftp.login('ftp.company.com', '21', 'ftpuser', 'ftppassword');
ftp.list(p_conn => l_conn,
p_dir => '/u01/app/oracle',
p_list => l_list);
ftp.logout(l_conn);

IF l_list.COUNT > 0 THEN
FOR i IN l_list.first .. l_list.last LOOP
DBMS_OUTPUT.put_line(i || ': ' || l_list(i));
END LOOP;
END IF;
END;
/

-- Get a directory listing (file names only) from a remote FTP server.
DECLARE
l_conn UTL_TCP.connection;
l_list ftp.t_string_table;
BEGIN
l_conn := ftp.login('ftp.company.com', '21', 'ftpuser', 'ftppassword');
ftp.nlst(p_conn => l_conn,
p_dir => '/u01/app/oracle',
p_list => l_list);
ftp.logout(l_conn);

IF l_list.COUNT > 0 THEN
FOR i IN l_list.first .. l_list.last LOOP
DBMS_OUTPUT.put_line(i || ': ' || l_list(i));
END LOOP;
END IF;
END;
/

-- Rename a file on a remote FTP server.
DECLARE
l_conn UTL_TCP.connection;
BEGIN
l_conn := ftp.login('ftp.company.com', '21', 'ftpuser', 'ftppassword');
ftp.rename(p_conn => l_conn,
p_from => '/u01/app/oracle/dba/shutdown',
p_to => '/u01/app/oracle/dba/shutdown.old');
ftp.logout(l_conn);
END;
/

-- Delete a file on a remote FTP server.
DECLARE
l_conn UTL_TCP.connection;
BEGIN
l_conn := ftp.login('ftp.company.com', '21', 'ftpuser', 'ftppassword');
ftp.delete(p_conn => l_conn,
p_file => '/u01/app/oracle/dba/temp.txt');
ftp.logout(l_conn);
END;
/

-- Create a directory on a remote FTP server.
DECLARE
l_conn UTL_TCP.connection;
BEGIN
l_conn := ftp.login('ftp.company.com', '21', 'ftpuser', 'ftppassword');
ftp.mkdir(p_conn => l_conn,
p_dir => '/u01/app/oracle/test');
ftp.logout(l_conn);
END;
/

-- Remove a directory from a remote FTP server.
DECLARE
l_conn UTL_TCP.connection;
BEGIN
l_conn := ftp.login('ftp.company.com', '21', 'ftpuser', 'ftppassword');
ftp.rmdir(p_conn => l_conn,
p_dir => '/u01/app/oracle/test');
ftp.logout(l_conn);
END;
/
The basic functions are implemented using LOBs to allow FTP without having to access files on the local filesystem. The get and put procedures string these together to form a complete job using all the functions. If a straight forward FTP to, or from, the local filesystem is required it is more efficient to use the GET_DIRECT and PUT_DIRECT procedures as they avoid the temporary LOBs.

The current implementation has the following issues:

The mput and mget operations are not supported directly, but can be implemented using a combination of the list/nlst and get/put operations.
The implementation of binary transfers relies on UTL_FILE features only available in Oracle9i Release 2 upwards.
There is no support for ASCII mode in the PUT_DIRECT procedure.
Thanks to Hans van Doormalen for noticing I wasn't closing my passive connections. I do now :)

If you are using Oracle 11g you will need to configure an access control list (ACL) to allow UTL_TCP to access the network. The examples above work correctly with the following basic ACL. You will need to amend the FTP server and username details to match your FTP server address and the Oracle username running the FTP API.

DECLARE
l_acl_name VARCHAR2(30) := 'utl_tcp.xml';
l_ftp_server VARCHAR2(20) := '192.168.2.131';
l_username VARCHAR2(30) := 'TEST';
BEGIN
DBMS_NETWORK_ACL_ADMIN.create_acl (
acl => l_acl_name,
description => 'Allow connections using UTL_TCP',
principal => l_username,
is_grant => TRUE,
privilege => 'connect',
start_date => SYSTIMESTAMP,
end_date => NULL);

COMMIT;

DBMS_NETWORK_ACL_ADMIN.add_privilege (
acl => l_acl_name,
principal => l_username,
is_grant => FALSE,
privilege => 'connect',
position => NULL,
start_date => NULL,
end_date => NULL);

COMMIT;

DBMS_NETWORK_ACL_ADMIN.assign_acl (
acl => l_acl_name,
host => l_ftp_server,
lower_port => NULL,
upper_port => NULL);

COMMIT;
END;
/

Database Administrator

Tuesday, May 8, 2012

Oracle 11g2 Database Replay

Monday, May 7, 2012

Table Reorganization, Rebuild

Friday, May 4, 2012

Purge Queue Table

Drop All Database Objects

Track User password change Audit Activity

Thursday, May 3, 2012

Foxpro Error Error building key for index Operation is invalid for a Memo, Blob, General or Picture field.

Foxpro Error: Operation is invalid for a Memo, Blob, General or Picture field.

Wednesday, May 2, 2012

Oracle 11g Embed Text to Sound translator

Friday, April 27, 2012

How to do FTP using PL SQL

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