Absolute versus Relative Reference

It’s important for software developers to understand the differences between absolute versus relative references.

Whether it’s from an Excel spreadsheet or from an oracle database. it’s an easy mistake to make.

I have created a test case where object “abso” , “refe” to represent absolute and relative reference, respectively.

Create test case:

LAX:(APPU@db01)> @test
LAX:(APPU@db01)> drop table abso purge;

Table dropped.

LAX:(APPU@db01)> create table abso (id int);

Table created.

LAX:(APPU@db01)> create or replace view abso_v as select id from appu.abso;

View created.

LAX:(APPU@db01)> create or replace trigger appu.abso_bi before insert on appu.abso for each row
  2  begin
  3  null;
  4  end;
  5  /

Trigger created.

LAX:(APPU@db01)> create trigger appu.abso_bd before delete on appu.abso for each row
  2  begin
  3  null;
  4  end;
  5  /

Trigger created.

LAX:(APPU@db01)> create or replace procedure abso_proc as
  2  l_id pls_integer;
  3  begin
  4  select id into l_id from appu.abso;
  5  end;
  6  /

Procedure created.

LAX:(APPU@db01)> drop table refe purge;

Table dropped.

LAX:(APPU@db01)> create table refe (id int);

Table created.

LAX:(APPU@db01)> create or replace view refe_v as select id from refe;

View created.

LAX:(APPU@db01)> create or replace trigger refe_bi before insert on refe for each row
  2  begin
  3  null;
  4  end;
  5  /

Trigger created.

LAX:(APPU@db01)> create trigger refe_bd before delete on refe for each row
  2  begin
  3  null;
  4  end;
  5  /

Trigger created.

LAX:(APPU@db01)> create or replace procedure refe_proc as
  2  l_id pls_integer;
  3  begin
  4  select id into l_id from refe;
  5  end;
  6  /

Procedure created.

LAX:(APPU@db01)>

Perform metadata export:

[oracle@lax:db01]/home/oracle
$ cat expdp_metadata.par
directory=DATA_PUMP_DIR
userid="/ as sysdba"
dumpfile=metadata.dmp
logfile=metadata.log
schemas=APPU
content=METADATA_ONLY
exclude=INDEX_STATISTICS,TABLE_STATISTICS
metrics=Y
[oracle@lax:db01]/home/oracle
$ expdp parfile=expdp_metadata.par

Export: Release 11.2.0.3.0 - Production on Sat Jul 13 10:28:41 2013

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SYS"."SYS_EXPORT_SCHEMA_01":  /******** AS SYSDBA parfile=expdp_metadata.par
Processing object type SCHEMA_EXPORT/USER
     Completed 1 USER objects in 1 seconds
Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
     Completed 1 SYSTEM_GRANT objects in 0 seconds
Processing object type SCHEMA_EXPORT/ROLE_GRANT
     Completed 1 ROLE_GRANT objects in 0 seconds
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE
     Completed 1 DEFAULT_ROLE objects in 2 seconds
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
     Completed 1 PROCACT_SCHEMA objects in 2 seconds
Processing object type SCHEMA_EXPORT/TABLE/TABLE
     Completed 2 TABLE objects in 2 seconds
Processing object type SCHEMA_EXPORT/PROCEDURE/PROCEDURE
     Completed 2 PROCEDURE objects in 0 seconds
Processing object type SCHEMA_EXPORT/PROCEDURE/ALTER_PROCEDURE
     Completed 2 ALTER_PROCEDURE objects in 3 seconds
Processing object type SCHEMA_EXPORT/VIEW/VIEW
     Completed 2 VIEW objects in 1 seconds
Processing object type SCHEMA_EXPORT/TABLE/TRIGGER
     Completed 4 TRIGGER objects in 7 seconds
Master table "SYS"."SYS_EXPORT_SCHEMA_01" successfully loaded/unloaded
******************************************************************************
Dump file set for SYS.SYS_EXPORT_SCHEMA_01 is:
  /tmp/metadata.dmp
Job "SYS"."SYS_EXPORT_SCHEMA_01" successfully completed at 10:29:09

[oracle@lax:db01]/home/oracle
$

Perform metadata import with remap_schema – creating SQL file:

[oracle@lax:db01]/home/oracle
$ cat impdp_metadata.par
directory=DATA_PUMP_DIR
userid="/ as sysdba"
dumpfile=metadata.dmp
schemas=APPU
remap_schema=APPU:NEWAPP
logfile=metadata.log
include=PROCEDURE,TRIGGER,VIEW
sqlfile=metadata.sql
metrics=Y
[oracle@lax:db01]/home/oracle
$ impdp parfile=impdp_metadata.par

Import: Release 11.2.0.3.0 - Production on Sat Jul 13 10:36:55 2013

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Master table "SYS"."SYS_SQL_FILE_SCHEMA_01" successfully loaded/unloaded
Starting "SYS"."SYS_SQL_FILE_SCHEMA_01":  /******** AS SYSDBA parfile=impdp_metadata.par
Processing object type SCHEMA_EXPORT/PROCEDURE/PROCEDURE
     Completed 2 PROCEDURE objects in 0 seconds
Processing object type SCHEMA_EXPORT/PROCEDURE/ALTER_PROCEDURE
     Completed 2 ALTER_PROCEDURE objects in 0 seconds
Processing object type SCHEMA_EXPORT/VIEW/VIEW
     Completed 2 VIEW objects in 1 seconds
Processing object type SCHEMA_EXPORT/TABLE/TRIGGER
     Completed 4 TRIGGER objects in 0 seconds
Job "SYS"."SYS_SQL_FILE_SCHEMA_01" successfully completed at 10:36:58

Do you see what’s wrong with this picture?

[oracle@lax:db01]/home/oracle
$ cat /tmp/metadata.sql
-- CONNECT SYS
ALTER SESSION SET EVENTS '10150 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10904 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '25475 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10407 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10851 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '22830 TRACE NAME CONTEXT FOREVER, LEVEL 192 ';
-- new object type path: SCHEMA_EXPORT/PROCEDURE/PROCEDURE
-- CONNECT NEWAPP
CREATE procedure abso_proc as
l_id pls_integer;
begin
select id into l_id from appu.abso; <<<
end;
/
CREATE procedure refe_proc as
l_id pls_integer;
begin
select id into l_id from refe;
end;
/
-- new object type path: SCHEMA_EXPORT/PROCEDURE/ALTER_PROCEDURE

ALTER PROCEDURE "NEWAPP"."ABSO_PROC"
  COMPILE
    PLSQL_OPTIMIZE_LEVEL=  2
    PLSQL_CODE_TYPE=  INTERPRETED
    PLSQL_DEBUG=  FALSE    PLSCOPE_SETTINGS=  'IDENTIFIERS:NONE'

 REUSE SETTINGS TIMESTAMP '2013-07-13 10:24:27'
/

ALTER PROCEDURE "NEWAPP"."REFE_PROC"
  COMPILE
    PLSQL_OPTIMIZE_LEVEL=  2
    PLSQL_CODE_TYPE=  INTERPRETED
    PLSQL_DEBUG=  FALSE    PLSCOPE_SETTINGS=  'IDENTIFIERS:NONE'

 REUSE SETTINGS TIMESTAMP '2013-07-13 10:24:28'
/
-- new object type path: SCHEMA_EXPORT/VIEW/VIEW
CREATE  FORCE VIEW "NEWAPP"."ABSO_V" ("ID") AS
  select id from appu.abso; <<<
CREATE  FORCE VIEW "NEWAPP"."REFE_V" ("ID") AS
  select id from refe;
-- new object type path: SCHEMA_EXPORT/TABLE/TRIGGER
CREATE TRIGGER "NEWAPP"."ABSO_BD"  before delete on appu.abso for each row <<<
begin
null;
end;
/

ALTER TRIGGER "NEWAPP"."ABSO_BD" ENABLE;

ALTER TRIGGER "NEWAPP"."ABSO_BD"
  COMPILE
    PLSQL_OPTIMIZE_LEVEL=  2
    PLSQL_CODE_TYPE=  INTERPRETED    PLSCOPE_SETTINGS=  'IDENTIFIERS:NONE'
;
CREATE TRIGGER refe_bi before insert on refe for each row
begin
null;
end;
/

ALTER TRIGGER "NEWAPP"."REFE_BI" ENABLE;

ALTER TRIGGER "NEWAPP"."REFE_BI"
  COMPILE
    PLSQL_OPTIMIZE_LEVEL=  2
    PLSQL_CODE_TYPE=  INTERPRETED    PLSCOPE_SETTINGS=  'IDENTIFIERS:NONE'
;
CREATE TRIGGER "NEWAPP"."ABSO_BI"  before insert on appu.abso for each row <<<
begin
null;
end;
/

ALTER TRIGGER "NEWAPP"."ABSO_BI" ENABLE;

ALTER TRIGGER "NEWAPP"."ABSO_BI"
  COMPILE
    PLSQL_OPTIMIZE_LEVEL=  2
    PLSQL_CODE_TYPE=  INTERPRETED    PLSCOPE_SETTINGS=  'IDENTIFIERS:NONE'
;
CREATE TRIGGER refe_bd before delete on refe for each row
begin
null;
end;
/

ALTER TRIGGER "NEWAPP"."REFE_BD" ENABLE;

ALTER TRIGGER "NEWAPP"."REFE_BD"
  COMPILE
    PLSQL_OPTIMIZE_LEVEL=  2
    PLSQL_CODE_TYPE=  INTERPRETED    PLSCOPE_SETTINGS=  'IDENTIFIERS:NONE'
;
[oracle@lax:db01]/home/oracle
$

Thank goodness for sed !!!

Remove schema reference using sed:

• sed -i ‘s/appu\.//g’ /tmp/metadata.sql
• sed -i ‘s/\”NEWAPP\”\.//g’ /tmp/metadata.sql

Why did I remove “NEWAPP” when it’s the correct schema?

Just to show you sed function.

[oracle@lax:db01]/home/oracle
$ sed -i 's/appu\.//g' /tmp/metadata.sql
[oracle@lax:db01]/home/oracle
$ sed -i 's/\"NEWAPP\"\.//g' /tmp/metadata.sql
[oracle@lax:db01]/home/oracle
$ cat /tmp/metadata.sql
-- CONNECT SYS
ALTER SESSION SET EVENTS '10150 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10904 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '25475 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10407 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10851 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '22830 TRACE NAME CONTEXT FOREVER, LEVEL 192 ';
-- new object type path: SCHEMA_EXPORT/PROCEDURE/PROCEDURE
-- CONNECT NEWAPP
CREATE procedure abso_proc as
l_id pls_integer;
begin
select id into l_id from abso;
end;
/
CREATE procedure refe_proc as
l_id pls_integer;
begin
select id into l_id from refe;
end;
/
-- new object type path: SCHEMA_EXPORT/PROCEDURE/ALTER_PROCEDURE
ALTER PROCEDURE "ABSO_PROC"
COMPILE
PLSQL_OPTIMIZE_LEVEL= 2
PLSQL_CODE_TYPE= INTERPRETED
PLSQL_DEBUG= FALSE PLSCOPE_SETTINGS= 'IDENTIFIERS:NONE'
REUSE SETTINGS TIMESTAMP '2013-07-13 10:24:27'
/
ALTER PROCEDURE "REFE_PROC"
COMPILE
PLSQL_OPTIMIZE_LEVEL= 2
PLSQL_CODE_TYPE= INTERPRETED
PLSQL_DEBUG= FALSE PLSCOPE_SETTINGS= 'IDENTIFIERS:NONE'

REUSE SETTINGS TIMESTAMP '2013-07-13 10:24:28'
/
-- new object type path: SCHEMA_EXPORT/VIEW/VIEW
CREATE FORCE VIEW "ABSO_V" ("ID") AS
select id from abso;
CREATE FORCE VIEW "REFE_V" ("ID") AS
select id from refe;
-- new object type path: SCHEMA_EXPORT/TABLE/TRIGGER
CREATE TRIGGER "ABSO_BD" before delete on abso for each row
begin
null;
end;
/

ALTER TRIGGER "ABSO_BD" ENABLE;

ALTER TRIGGER "ABSO_BD"
COMPILE
PLSQL_OPTIMIZE_LEVEL= 2
PLSQL_CODE_TYPE= INTERPRETED PLSCOPE_SETTINGS= 'IDENTIFIERS:NONE'
;
CREATE TRIGGER refe_bi before insert on refe for each row
begin
null;
end;
/

ALTER TRIGGER "REFE_BI" ENABLE;

ALTER TRIGGER "REFE_BI"
COMPILE
PLSQL_OPTIMIZE_LEVEL= 2
PLSQL_CODE_TYPE= INTERPRETED PLSCOPE_SETTINGS= 'IDENTIFIERS:NONE'
;
CREATE TRIGGER "ABSO_BI" before insert on abso for each row
begin
null;
end;
/

ALTER TRIGGER "ABSO_BI" ENABLE;

ALTER TRIGGER "ABSO_BI"
COMPILE
PLSQL_OPTIMIZE_LEVEL= 2
PLSQL_CODE_TYPE= INTERPRETED PLSCOPE_SETTINGS= 'IDENTIFIERS:NONE'
;
CREATE TRIGGER refe_bd before delete on refe for each row
begin
null;
end;
/

ALTER TRIGGER "REFE_BD" ENABLE;

ALTER TRIGGER "REFE_BD"
COMPILE
PLSQL_OPTIMIZE_LEVEL= 2
PLSQL_CODE_TYPE= INTERPRETED PLSCOPE_SETTINGS= 'IDENTIFIERS:NONE'
;
[oracle@lax:db01]/home/oracle
$