SCHEMA REFRESH STEPS ON SAME DATABASE.pdf

SCHEMA REFRESH IN ORACLE USING EXP/IMP

SCHEMA REFRESH SCHEMA REFRESH is a regular job for DBA’s. So I decide to prepare an informative document for schema refresh. We can achieve schema refresh in two ways, they are 1) Refresh the database schema with Production database. 2) Refresh the database schema from Production database to some other databases like DEV/TEST/... REFRESH SCHEMA STEPS ON SAME DATABASE Find the roles & privileges that are assigned to the schema. Capture source database schema objects count. Export database schema using EXP/EXPDP utility. Drop the schema in the production database except DBLINK. Recreate the schema with default tablespace and allocate quota. Make required roles & privileges for the schema. Connect to SHAM and ensure default tablespace, roles and privileges. Import the dump file using IMP/IMPDP into the target database. Recompile invalid objects. Gather schema statistics after the refresh.

PRE - REQ FOR SCHEMA REFRESH Refreshing sham schema on crms database. Source and destination database is same. Let’s start. SYS> select username, account_status, default_tablespace, temporary_tablespace FROM

dba_users WHERE username=upper('&username');

Enter value for username: SHAM old

2: where username=upper('&username')

new

2: where username=upper('SHAM')

USERNAME

ACCOUNT_STATUS

DEFAULT_TABLESPACE

--------- ----------------- -------------------SHAM

OPEN

TBS1

SYS> select owner, sum(bytes)/1024/1024/1024

TEMPORARY_TABLESPACE --------------------TEMP

"SIZE in GB"

FROM dba_segments WHERE owner=upper('&owner') GROUP BY owner; Enter value for owner: sham old

2: where owner=upper('&owner') group by owner

new

2: where owner=upper('sham') group by owner

OWNER ------SHAM

SIZE in GB ---------40.35

SYS> select distinct tablespace_name from dba_segments WHERE owner in ('SHAM'); TABLESPACE_NAME ---------------TBS1

TBS2

TBS3

USERS

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SCHEMA REFRESH IN ORACLE USING EXP/IMP

FIND THE TABLESPACES AND SIZE OF THAT SCHEMA SYS> select tablespace_name, sum(bytes/1024/1024/1024) "Size in GB" from

dba_segments where owner='SHAM' group by tablespace_name;

TABLESPACE_NAME

Size in GB

------------------------------ ---------TBS1

9.062

TBS2

6.048

TBS3

8. 82

USERS

16. 42

CHECK TABLESPACE QUOTAS FOR THAT SCHEMA SYS> select * from dba_ts_quotas where username='SHAM'; .. ... [Trimmed] Quota is the amount of space allocated to a user in a tablespace. In dba_ts_quotas view, MAXBYTES column value of -1 indicates UNLIMITED, means that user can use as much space in that tablespace. SPOOL THE OUTPUT OF ROLES & PRIVILEGES ASSIGNED TO THE USER SYS> select * from dba_role_privs where grantee in('SHAM'); GRANTEE

GRANTED_ROLE

ADM DEF

------------------------------ ------------------------------ --- --SHAM

RESOURCE

NO

YES

SHAM

CONNECT

NO

YES

SYS> select * from dba_sys_privs where grantee in('SHAM'); GRANTEE

PRIVILEGE

ADM

------------------------------ ---------------------------------------- --SHAM

CREATE SEQUENCE

NO

SHAM

CREATE ANY SEQUENCE

NO

SHAM

CREATE VIEW

NO

SHAM

CREATE DATABASE LINK

NO

SHAM

CREATE SYNONYM

NO

SHAM

CREATE PROCEDURE

NO

SHAM

CREATE TRIGGER

NO

SHAM

CREATE ANY TABLE

NO

SHAM

UNLIMITED TABLESPACE

NO

9 rows selected. SHAM> spool roles_privs.sql; SHAM> select 'Grant ' || role

||' to SHAM' "ROLES_PRIVILIGES" from session_roles;

SHAM> select 'Grant ' || privilege ||' to SHAM' "ROLES_PRIVILIGES" from session_privs; SHAM> spool off;

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SCHEMA REFRESH IN ORACLE USING EXP/IMP

CHECK DATABASE LINKS FOR THAT SCHEMA SYS> select owner, db_link, username from dba_db_links WHERE owner='SHAM'; OWNER

DB_LINK

USERNAME

------ ---------- -------SHAM

TESTLINK

ROSE

CHECK ALL OBJECTS IN THAT SCHEMA SYS> select owner, object_type, count(*) FROM dba_objects WHERE owner=upper('&owner') AND object_name not like 'BIN$%' GROUP BY object_type, owner ORDER BY object_type; Enter value for owner: sham OWNER

OBJECT_TYPE

COUNT(*)

------------------------------ ------------------- ---------SHAM

FUNCTION

1

SHAM

INDEX

SHAM

PACKAGE

1

SHAM

PACKAGE BODY

1

SHAM

PROCEDURE

1

SHAM

SEQUENCE

2

SHAM

SYNONYM

1

SHAM

TABLE

SHAM

TABLE PARTITION

3

SHAM

TRIGGER

2

SHAM

VIEW

1

SHAM

DATABASE LINK

1

10

12

12 rows selected. FIND TOTAL OBJECTS IN THAT SCHEMA SHAM> select object_name, object_type, subobject_name, status FROM user_objects; OBJECT_NAME

OBJECT_TYPE

SUBOBJECT_NAME

STATUS

---------------------------- ---------------- --------------- ------GRADE

TABLE

VALID

PROJECT

TABLE

VALID

TRANSPORT

TABLE

VALID

EMP_PROJ_INFO

TABLE

VALID

EMP_PERS_INFO

TABLE

VALID

EMP_INFO

TABLE

VALID

PAYROLL

TABLE

VALID

EMP

TABLE

VALID

DEPT

TABLE

VALID

SEQ_EMP_INFO1

SEQUENCE

VALID

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SCHEMA REFRESH IN ORACLE USING EXP/IMP

SEQ_EMP_INFO

SEQUENCE

VALID

TRI_EMP

TRIGGER

VALID

EMP_AUDIT

TABLE

VALID

LOGTAB

TABLE

VALID

USRLOG

TRIGGER

VALID

VEMP_INFO

VIEW

VALID

CONT_EMP

TABLE

VALID

CONT_EMP

TABLE PARTITION

P1

VALID

CONT_EMP

TABLE PARTITION

P2

VALID

CONT_EMP

TABLE PARTITION

P3

VALID

MULT_TAB

FUNCTION

VALID

PKGSAL

PACKAGE BODY

VALID

PROC1

PROCEDURE

VALID

PAYROLL_INFO

SYNONYM

VALID

PAYROLL_SAL_IN4

INDEX

VALID

EMP_DPID_IN1

INDEX

VALID

EMP_PRJ_INFO_PRJID_IN3

INDEX

VALID

EMP_PRJ_INFO_DPID_IN2

INDEX

VALID

PKGSAL

PACKAGE

VALID

PAYROLL_ACCNO_C11_UQ

INDEX

VALID

EMP_PRJ_INFO_MAILID_C9_UQ

INDEX

VALID

PROJ_PRJID_C4_PK

INDEX

VALID

DEPT_DEPTID_C3_PK

INDEX

VALID

EMP_EMPID_C1_PK

INDEX

VALID

GRD_EMPGRD_C12_PK

INDEX

VALID

TESTLINK

DATABASE LINK

VALID

36 rows selected. SHAM> select constraint_name , constraint_type , table_name , r_constraint_name, r_owner FROM all_constraints WHERE CONSTRAINT_NAME

owner='SHAM'; CONST TABLE_NAME

R_CONSTRAINT_NAME

R_OWNER

------------------------------ ----- -------------------- -------------------- -------PAYROLL_EMPID_C7_FK

R

PAYROLL

EMP_EMPID_C1_PK

SHAM

EMP_PRJ_INFO_EMPID_C5_FK

R

EMP_PROJ_INFO

EMP_EMPID_C1_PK

SHAM

EMP_PERS_INFO_EID_C6_FK

R

EMP_PERS_INFO

EMP_EMPID_C1_PK

SHAM

TRNSPRT_PRJID_C10_FK

R

TRANSPORT

EMP_EMPID_C1_PK

SHAM

EMP_ELEVEL_C13_FK

R

EMP

GRD_EMPGRD_C12_PK

SHAM

GRD_EMPGRD_C12_PK

P

GRADE

PROJ_PRJID_C4_PK

P

PROJECT

PAYROLL_ACCNO_C11_UQ

U

PAYROLL

EMP_PRJ_INFO_MAILID_C9_UQ

U

EMP_PROJ_INFO

EMP_EMPID_C1_PK

P

EMP

DEPT_DEPTID_C3_PK

P

DEPT

EMP_DEPTID_C2_NTNL

C

EMP

EMP_PRJ_INFO_DEPTID_C8_NL

C

EMP_PROJ_INFO

GRD_DESC_C14_NL

C

GRADE

14 rows selected.

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SCHEMA REFRESH IN ORACLE USING EXP/IMP

FIND INDEXES AND IT’S ASSOCIATED TABLESPACES SHAM> select table_name, index_name, tablespace_name from user_indexes; TABLE_NAME

INDEX_NAME

TABLESPACE_NAME

------------------------------ ------------------------------ -----------------------------PROJECT

PROJ_PRJID_C4_PK

TBS1

PAYROLL

PAYROLL_ACCNO_C11_UQ

TBS1

PAYROLL

PAYROLL_SAL_IN4

USERS

EMP_PROJ_INFO

EMP_PRJ_INFO_MAILID_C9_UQ

TBS1

EMP_PROJ_INFO

EMP_PRJ_INFO_DPID_IN2

USERS

EMP_PROJ_INFO

EMP_PRJ_INFO_PRJID_IN3

USERS

EMP

EMP_EMPID_C1_PK

TBS1

EMP

EMP_DPID_IN1

USERS

DEPT

DEPT_DEPTID_C3_PK

TBS1

GRADE

GRD_EMPGRD_C12_PK

TBS1

10 rows selected.

FIND THE ENCRYPTED PASSWORD FOR THE SCHEMA SYS> select password from sys.user$ where name='SHAM'; PASSWORD ----------------8657483259C22FDE

EXPORT THE SCHEMA Export the schema from the crms database with the name of the file as refresh_sham.dmp $ export ORACLE_SID=crms $ exp system/manager file=refresh_sham.dmp log=schema_refresh_sham.log owner=sham direct=y statistics=none .. ... [Trimmed] Export terminated successfully without warnings. STEPS TO DROP AND RECREATE THE SCHEMA Drop the sham schema from the crms database. Recreate the user with default tablespace and quotas on different tablespaces. Assign temporary tablespace to that user. Execute the spooled script (roles_privs.sql) which contains roles and privileges to the user. EX : SYS>@roles_privs.sql; Script grants the roles and privileges to the user obtained before dropping it. Connect to the user and verify allocated tablespaces, roles and privileges. ** Before drop all the objects in that Schema, connect the schema and Spool the output.

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SCHEMA REFRESH IN ORACLE USING EXP/IMP

POINTS TO NOTE Suppose if you want to remove tables manually first you have to delete child tables otherwise oracle won’t allow directly to drop parents table. Let’s see. SHAM> drop table emp; drop table emp * ERROR at line 1: ORA-02449: unique/primary keys in table referenced by foreign keys While dropping tables manually we can see ORA-02449 error. Use the below query to find reference key constraints and drop the tables first. SHAM> Select constraint_name, constraint_type, table_name FROM

all_constraints WHERE constraint_type='R'

AND r_constraint_name in (select constraint_name from all_constraints where table_name='EMP'); CONSTRAINT_NAME

C TABLE_NAME

------------------------------ - -----------------------------EMP_PRJ_INFO_EMPID_C5_FK

R EMP_PROJ_INFO

PAYROLL_EMPID_C7_FK

R PAYROLL

TRNSPRT_PRJID_C10_FK

R TRANSPORT

EMP_PERS_INFO_EID_C6_FK

R EMP_PERS_INFO

SCRIPT TO FIND & DROP OBJECTS FROM THAT SCHEMA SHAM> spool drop_tables.sql; SHAM> select 'drop table '||table_name||' cascade constraints purge; 'from user_tables; SHAM> spool off; SHAM> spool drop_other_objects.sql; SHAM> select 'drop '||object_type||' '||object_name||';' from user_objects; SHAM> spool off; SHAM> DISC DROP THE SCHEMA SYS> drop user sham cascade;

# note SCN 4607636

User dropped. RECREATE THE USER WITH DEFAULT TABLESPACE , TEMPORARY TABLESPACE & QUOTAS SYS> create user sham identified by values '8657483259C22FDE' default tablespace tbs1 temporary tablespace temp quota unlimited on tbs1 quota unlimited on tbs2 quota unlimited on tbs3 quota unlimited on users; User created. ** Sham user has default profile. If you have specific profile name for the user add it.

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SCHEMA REFRESH IN ORACLE USING EXP/IMP

RUN SPOOLED SCRIPT TO GRANT ROLES & PRIVILEGES SYS>@roles_privs.sql;

roles_privs.sql

IMPORT DATA INTO CRMS DATABASE $ export ORACLE_SID=crms $ imp system/manager file=refresh_sham.dmp log=refresh_sham_imp.log fromuser=sham touser=sham

Import: Release 11.2.0.1.0 - Production on Fri May 28 22:48:48 2015 Copyright (c) 1982, 2009, Oracle and/or its affiliates.

All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production With the Partitioning, OLAP, Data Mining and Real Application Testing options

Export file created by EXPORT:V11.02.00 via direct path import done in US7ASCII character set and AL16UTF16 NCHAR character set import server uses WE8MSWIN1252 character set (possible charset conversion) . importing SHAM's objects into SHAM . importing partition

"CONT_EMP":"P1"

42202 rows imported

. . importing partition

"CONT_EMP":"P2"

44020 rows imported

. . importing partition

"CONT_EMP":"P3"

42015 rows imported

. . importing table

"DEPT"

12

rows imported

. . importing table

"EMP"

168022

rows imported

. . importing table

"EMP_AUDIT"

24

rows imported

. . importing table

"EMP_INFO"

168022

rows imported

. . importing table

"EMP_PERS_INFO"

168022

rows imported

. . importing table

"EMP_PROJ_INFO"

168022

rows imported

. . importing table

"GRADE"

12

rows imported

. . importing table

"LOGTAB"

2666

rows imported

. . importing table

"PAYROLL"

168022

rows imported

. . importing table

"PROJECT"

22

rows imported

. . importing table

"TRANSPORT"

148213

rows imported

About to enable constraints... Import terminated successfully without warnings. BASIC CHECKS AFTER IMPORT THE SCHEMA SYS> select owner, object_type, count(object_type) from dba_objects WHERE owner ='SHAM' GROUP BY owner, object_type; ** Schema object count should be same before export and after import.

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SCHEMA REFRESH IN ORACLE USING EXP/IMP

SYS> select username, password, default_tablespace, temporary_tablespace, profile from dba_users WHERE username ='SHAM'; SYS> select owner,sum(bytes)/1024/1024/1024 "SIZE in GB" from dba_segments WHERE owner=upper('&owner') GROUP BY owner; SYS> select * from dba_role_privs where grantee in('SHAM'); SYS> select * from dba_sys_privs where grantee in('SHAM'); SYS> select * from dba_ts_quotas where username='SHAM'; FIND THE INVALID OBJECTS FOR THE SCHEMA SYS> select owner, object_name, object_type, status from dba_objects WHERE status 'VALID' AND OWNER='SHAM'; If you find any invalid objects execute following script. SYS> @?/rdbms/admin/utlrp.sql; Check the privileges, tablespace quotas, and dblinks for that the schema. This is essential. ARE ALL GRANTS IMPORTED ? NO. If the schema received grant privilege from others does NOT get export when you export the schema. So, it does NOT get import when you import the schema. 1) Grants given by a user are exported with the user. SHAM> grant select on sham.emp to scott; SHAM> grant update on sham.emp to scott; 2) Grants received by a user are NOT exported with the user. SCOTT> grant select on scott.salgrade to sham; SCOTT> grant update on scott.salgrade to sham; GATHER NEW STATISTICS FOR THE SCHEMA SYS> exec dbms_stats.gather_schema_stats(ownname =>'SHAM', method_opt=>'FOR ALL INDEXES FOR ALL INDEXED COLUMNS SIZE 1',estimate_percent => 15,granularity=>'ALL',cascade=>TRUE); PL/SQL procedure successfully completed.

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