We are migrating from oracle 11g to 12c. We have a number of DB links created in 11g db but we're not sure whether they are really in use or not.
Since its a production environment we cannot disable the DB links and wait for some jobs to fail.
Is there any way to find out whether particular DB links are in use or not?
One of the crude way I was thinking is, writing a script to loop every 5 minutes gv$sql and search for DB link names in a query and log it. The script will run for a few days.
Is there any other way to find out?
This will search all_source for every link that is found in all_db_links.
begin
for c_links in (select '#'||db_link as db_link from ALL_DB_LINKS)
loop
dbms_output.put_line('search for link: '||c_links.db_link);
for c_source in (select * from all_source s
where upper(s.text) like '%'||c_links.db_link||'%')
loop
dbms_output.put_line('link '||c_links.db_link || 'is used in: ' || c_source.name);
end loop;
end loop;
end;
This could help you identify which links are referenced in procedures, functions and packages.
Related
My current task involves deep cloning [table, index, sequence] a set of tables (not all of them are in the same schema) from a remote (Prod) Oracle DB to my local (Dev) XE Db (including data), and - if possible - even having it all be one script or file I can execute (if need be, I can hope they accept a compiled program).
I knew of create table <name> as select * from <name>#<link> and the equivalent insert, which is probably the best for copying the data, but not definition
I've searched around and stumbled across dbms_metadata.get_ddl() which helped a bit, but I haven't figured out how to connect to the remote database using it, and also haven't found out how to get the tables from the other schemas.
I have a total of 3 schemas (the main one for my application (we'll call "MY", the company's base data (we'll call "COMP" and a related application of a colleague (we'll call "COLL"))
I've tried the script from here, which looked promising, but as I said, I haven't figured out how to connect to remote and the different schemas (the company is the hardest one, as I don't know if I can log into it, and only have select permission
SELECT DBMS_METADATA.GET_DDL('TABLE', table_name, owner)
FROM all_tables WHERE owner = UPPER('&1');
When I tried the get_ddl with a different owner, the sql developer gave me the error:
"Object %s of type TABLE in schema %s not found" where the first %s is
the first table in the (second %s) schema (COMP)
Dbms_metadata is good option. But for using it with dblink you have to write more code.
First your remote user (dblinku user) should have select_catalog_role.
Below example is not complete solution and it should work only for object per request. For more details got to dbms_metadata manual.
Declare
h1 NUMBER;
table_name varchar2(100) :='table_name';
from_schema varchar2(100) :='schema_name';
db_link varchar2(100) :='db_link_name';
xml CLOB;
begin
h1 := DBMS_METADATA.OPEN('TABLE',network_link => db_link ); --open context with db link name.
DBMS_METADATA.SET_FILTER(h1,'NAME',table_name);
DBMS_METADATA.SET_FILTER(h1,'SCHEMA',from_schema);
xml := DBMS_METADATA.FETCH_CLOB(h1);
DBMS_OUTPUT.PUT_LINE(h1);
IF xml IS not NULL THEN
DBMS_OUTPUT.PUT_LINE(xml);
END IF;
DBMS_METADATA.CLOSE(h1);
end;
This question has been asked here before so please forgive me for asking again; the answers did not resolve my issue.
I'm working on a report interface that will run stored procedures from an Oracle database through my .NET application. We have 2 oracle database instances: Dev and Stage. I can connect to both Oracle databases from SQL Developer app and run stored procedures successfully.
The problem exists when I try to run report from the web UI that calls the DEV database. It breaks and returns Oracle errors telling me there are no records, but when I run the same report using the same Dev stored procedure and the database pointing to the STAGE, it returns data with no issues.
BEGIN
-- <logic>Get current role</logic>
SELECT GRANTED_ROLE
INTO L_GRANTED_ROLE
FROM USER_ROLE_PRIVS
WHERE GRANTED_ROLE LIKE 'XYZ_%';
-- <logic>Retrieve the employee id</logic>
L_EMPLOYEE_ID := XYZ.UTILS.GET_EMPLOYEE_ID;
-- <logic>Load course profile</logic>
XYZ.UTILS.LOAD_EMP_TEACHING_PROFILE (P_COURSE_ID, NULL);
So it is very simple. In stage db you must have data returned in following query and in dev, there is no data with following query:
SELECT GRANTED_ROLE
--INTO L_GRANTED_ROLE
FROM USER_ROLE_PRIVS
WHERE GRANTED_ROLE LIKE 'XYZ_%';
Execute above query and you will find the issue by yourself.
You need to change the logic of your proc to handle such cases.
Cheers!!
I would like a single query to drop all of the views in my oracle schema. I know this isn't correct syntax (or I wouldn't be asking), but the idea that I am going for is like the following:
DROP VIEW (SELECT view_name FROM user_views);
I broke down and used a PL/SQL block like the following:
begin
for i in (select view_name from user_views) loop
execute immediate 'drop view ' || i.view_name;
end loop;
end;
If anybody knows a single query solution, I would still be curious.
You could use this query to generate the statements that you need to run (and then run the statements):
select 'drop view '||view_name||';' as statements
from all_views
where owner = 'YOUR_SCHEMA_NAME'
Be careful that you don't inadvertently remove any views in your schema that might have been created by someone other than you and which you might need, if such is possible in your particular circumstances. For example, if you use Oracle Data Miner, it stores a number of objects in your schema as you create workflows and such.
Oracle 11gR2 (x86 Windows):
I have a db with 250 tables with indexes and constraints. I need to re-create these tables, indexes and constraints in a new db and load the data. I need to know how to do the following in SQL Plus and/or SQL Developer, unless there's a magical utility that can automate all of this. Thanks in advance!
Unload (export) all the data from the 250 tables.
Create an sql script file containing the CREATE TABLE statements for the 250 tables.
Create an sql script file containing the CREATE INDEX statements for the 250 tables.
Create an sql script file containing the ALTER TABLE ADD CONSTRAINT statements for the 250 tables.
Run the script to create the tables in a new db.
Load the exported data into the tables in the new db.
Run the script to create all the indexes.
Run the script to add all the contraints.
EDIT: I'm connected to the remote desktop which links to the source db on a Windows Server 2008. The remote only has an Oracle client installed. For security reasons, I'm not allowed to link directly from my local computer to the Win Server, so can I dump the whole source db to the remote then zip it to my local target machine? I'm trying to replicate the entire db on my computer.
Starting from Oracle 10g, you could use the Data Pump command-line clients expdb and impdb to export/import data and/or schema from one DB to an other. As a matter of fact, those two command-line utilities are only wrappers that "use the procedures provided in the DBMS_DATAPUMP PL/SQL package to execute export and import commands, using the parameters entered at the command line." (quoted from Oracle's documentation)
Given your needs, you will have to create a directory then generate a full dump of your database using expdb:
SQL> CREATE OR REPLACE DIRECTORY dump_dir AS '/path/to/dump/folder/';
sh$ expdp system#db10g full=Y directory=DUMP_DIR dumpfile=db.dmp logfile=db.log
As the dump is written using some binary format, you will have to use the corresponding import utility to (re)import your DB. Basically replacing expdb by impdb in the above command:
sh$ impdp system#db10g full=Y directory=DUMP_DIR dumpfile=db.dmp logfile=db.log
For simple table dump, use that version instead:
sh$ expdp sylvain#db10g tables=DEPT,EMP directory=DUMP_DIR dumpfile=db.dmp logfile=db.log
As you noticed, you can use it with your standard user account, provided you have access to the given directory (GRANT READ, WRITE ON DIRECTORY dump_dir TO sylvain;).
For detailed usage explanations, see
http://www.oracle-base.com/articles/10g/oracle-data-pump-10g.php.
If you can create a database link from your local database to the one that currently contains the data, you can use the DBMS_DATAPUMP package to copy the entire schema. This is an interface to Datapump (as #Sylvain Leroux mentioned) that is callable from within the database.
DECLARE
dph NUMBER;
source_schema VARCHAR2 (30) := 'SCHEMA_TO_EXPORT';
target_schema VARCHAR2 (30) := 'SCHEMA_TO_IMPORT';
job_name VARCHAR2 (30) := UPPER ('IMPORT_' || target_schema);
p_parallel NUMBER := 3;
v_start TIMESTAMP := SYSTIMESTAMP;
v_state VARCHAR2 (30);
BEGIN
dph :=
DBMS_DATAPUMP.open ('IMPORT',
'SCHEMA',
'DB_LINK_NAME',
job_name);
DBMS_OUTPUT.put_line ('dph = ' || dph);
DBMS_DATAPUMP.metadata_filter (dph,
'SCHEMA_LIST',
'''' || source_schema || '''');
DBMS_DATAPUMP.metadata_remap (dph,
'REMAP_SCHEMA',
source_schema,
target_schema);
DBMS_DATAPUMP.set_parameter (dph, 'TABLE_EXISTS_ACTION', 'REPLACE');
DBMS_DATAPUMP.set_parallel (dph, p_parallel);
DBMS_DATAPUMP.start_job (dph);
DBMS_DATAPUMP.wait_for_job (dph, v_state);
DBMS_OUTPUT.put_line ('Export/Import time: ' || (SYSTIMESTAMP - v_start));
DBMS_OUTPUT.put_line ('Final state: ' || v_state);
END;
The script above actually copies and renames the schema. If you want to keep the same schema name, I believe you'd just remove the metadata_remap call.
SQL Developer can help with #1 by creating INSERT statements with a formatted query result:
Select /*insert*/ *
from My_Table;
I need to be able to drop a specific user (which may have active sessions) from the batch without any user interaction. I don't care about active sessions and want them to be dropped and rolled back. For Microsoft SQL i would do similar task with a single line:
osql -E -S localhost -b -Q "use master if ((select name from sysdatabases where name='%DB%') is not null) begin alter database [%DB%] set single_user with rollback immediate drop database [%DB%] end"
How do i do it for Oracle (10g XE on Windows)?
My current batch is:
sqlplus sys/*** as SYSDBA #delete1.sql >delete.log
sqlplus sys/***#XE as SYSDBA #delete2.sql >>delete.log
where delete1.sql:
startup force;
exit;
and delete2.sql:
drop user MYUSER cascade;
exit;
This is ugly as hell and takes too long comparing to the split second of MSSQL solution.
It should work if you use the following script (here named drop_user_with_active_sessions.sql):
set verify off
begin
for s in (
select
sid, serial#
from
v$session
where
username = '&1'
) loop
execute immediate
'alter system kill session ''' ||
s.sid || ',' ||
s.serial# || ''' immediate';
end loop;
execute immediate 'drop user &1';
end;
/
exit
And the use it with
sqlplus username/password#instance #c:\path\to\drop_user_with_active_session.sql MYUSER
you can do Oracle SQL via the command prompt and then do your cascade drop user.
I would recommend creating a sql script and executing it from the command line.
then you can wrap up command line text in your cmd/batch file.
but if you would like Oracle to handle the entire process I would recommend looking into the job/schedule environment
In addition to "alter system kill session" mentioned above I've also needed to preface the kill session with something like:
execute immediate 'ALTER SYSTEM DISCONNECT SESSION ''' ||
to_char(s.sid) || ', ' || to_char(s.serial#) || ''' IMMEDIATE'
It's a very, very bad idea to take a construct from one Database platform and assume I can run the exact same thing on a different platform. For example. Oracle has Create OR REPLACE procedure. MSSS isn't quite so simple. MSSS you can make a "temp" table with #name, in Oracle we use DDL. While dropping a user to recreate a fresh environment may have been the simplest approach on MSSS, perhaps there's a more Oracle-centric way to accomplish the same thing. It's a very good idea to ask for help on how to accomplish a task instead of why your way isn't working.
First, does the app being tested do DDL? to the tables and other objects?
If it only changes data, they way Oracle prefers apps to work, then why do you have to recreate all the objects. You just need to get the data back to the starting point.
Have you looked into Flashback Database? You should be able to create a restore point... do whatever you want and then flashback the database to that point in time.