Delete all objects in schema using batch file in Oracle - oracle

Question

I have below Select query which will generate delete statements to delete all objects in schema.
select 'DROP '||OBJECT_TYPE||' '||OWNER||'.'||OBJECT_NAME
|| case when OBJECT_TYPE = 'TABLE'
then ' CASCADE CONSTRAINTS PURGE' else '' end
||';'
from all_objects
where OWNER = 'RATOR_MONITORING';
I want to create batch file and suppose that instead of generating delete statements separetly I can create may be cursor or something and save it in batch file and run the batch file to delete all contents in schema. How to do it?

Answer 1

You can find many script in the Internet. Neither of them work on 100%. There can we various gotchas. Like scheduler chains or materialized view groups.
This is the one I use (it is also inspired by one I found in the Internet)
set serveroutput on size unlimited
declare
v_ItemCount integer;
begin
SELECT count(*)
INTO v_ItemCount
FROM ALL_OBJECTS AO
WHERE AO.OWNER = '&USER'
AND AO.OBJECT_TYPE NOT IN ('INDEX', 'LOB')
AND AO.OBJECT_NAME NOT LIKE 'BIN$%';
while (v_ItemCount > 0) loop
for v_Cmd in (SELECT 'drop ' || AO.OBJECT_TYPE || ' ' || '"'||AO.OWNER||'"'|| '.' || '"'||AO.OBJECT_NAME||'"' ||
DECODE(AO.OBJECT_TYPE,
'TABLE',
' CASCADE CONSTRAINTS',
'') as DROPCMD,
AO.OWNER,
AO.OBJECT_TYPE,
AO.OBJECT_NAME
FROM ALL_OBJECTS AO
WHERE AO.OWNER = '&USER'
AND AO.OBJECT_TYPE NOT IN ('INDEX', 'LOB')
AND AO.OBJECT_NAME NOT LIKE 'BIN$%')
loop
begin
if v_Cmd.OBJECT_TYPE = 'SCHEDULE' then
DBMS_SCHEDULER.DROP_SCHEDULE(v_Cmd.OWNER||'.'||v_Cmd.OBJECT_NAME, true);
ELSIF v_Cmd.OBJECT_TYPE = 'JOB' then
DBMS_SCHEDULER.DROP_JOB(v_Cmd.OWNER||'.'||v_Cmd.OBJECT_NAME, true);
ELSIF v_Cmd.OBJECT_TYPE = 'PROGRAM' then
DBMS_SCHEDULER.DROP_PROGRAM(v_Cmd.OWNER||'.'||v_Cmd.OBJECT_NAME, true);
else
execute immediate v_Cmd.dropcmd;
end if;
dbms_output.put_line(v_Cmd.dropcmd);
exception
when others then
null; -- ignore errors
end;
end loop;
SELECT count(*)
INTO v_ItemCount
FROM ALL_OBJECTS AO
WHERE AO.OWNER = '&USER'
AND AO.OBJECT_TYPE NOT IN ('INDEX','LOB')
AND AO.OBJECT_NAME NOT LIKE 'BIN$%';
end loop;
execute immediate 'purge dba_recyclebin';
end;

Answer 2

Here is the script
begin
for i in (select * from dba_objects where owner = 'SO' and object_type <> 'TABLE')
loop
execute immediate 'drop ' || i.object_type || ' ' || i.object_name;
end loop;
for j in (select * from dba_objects where owner = 'SO' and object_type = 'TABLE')
loop
execute immediate 'drop ' || j.object_type || ' ' || j.object_name || ' cascade constraints';
end loop;
end;
/
This link provides details about how to create shell script or batch script to run sql scripts.
https://oracle-base.com/articles/misc/oracle-shell-scripting

Answer 3

Here we go i have compiled a shell to perform the Purge Schema. Let me know if this helps.
#weekly report
#!/bin/ksh
export ORACLE_HOME=/opt/oracle/product/1020
export PATH=$ORACLE_HOME/bin:$PATH:.
export NLS_LANG=AMERICAN_AMERICA.AL32UTF8
ABC=`sqlplus -s <username>/<password>#<sid> <<+
set sqlbl on;
set serveroutput on;
DECLARE
v_ItemCount INTEGER;
BEGIN
SELECT COUNT(*)
INTO v_ItemCount
FROM ALL_OBJECTS AO
WHERE AO.OWNER = '&USER'
AND AO.OBJECT_TYPE NOT IN ('INDEX', 'LOB')
AND AO.OBJECT_NAME NOT LIKE 'BIN$%';
WHILE (v_ItemCount > 0)
LOOP
FOR v_Cmd IN
(SELECT 'drop '
|| AO.OBJECT_TYPE
|| ' '
|| '"'
||AO.OWNER
||'"'
|| '.'
|| '"'
||AO.OBJECT_NAME
||'"'
|| DECODE(AO.OBJECT_TYPE, 'TABLE', ' CASCADE CONSTRAINTS', '') AS DROPCMD,
AO.OWNER,
AO.OBJECT_TYPE,
AO.OBJECT_NAME
FROM ALL_OBJECTS AO
WHERE AO.OWNER = '&USER'
AND AO.OBJECT_TYPE NOT IN ('INDEX', 'LOB')
AND AO.OBJECT_NAME NOT LIKE 'BIN$%'
)
LOOP
BEGIN
IF v_Cmd.OBJECT_TYPE = 'SCHEDULE' THEN
DBMS_SCHEDULER.DROP_SCHEDULE(v_Cmd.OWNER||'.'||v_Cmd.OBJECT_NAME, true);
ELSIF v_Cmd.OBJECT_TYPE = 'JOB' THEN
DBMS_SCHEDULER.DROP_JOB(v_Cmd.OWNER||'.'||v_Cmd.OBJECT_NAME, true);
ELSIF v_Cmd.OBJECT_TYPE = 'PROGRAM' THEN
DBMS_SCHEDULER.DROP_PROGRAM(v_Cmd.OWNER||'.'||v_Cmd.OBJECT_NAME, true);
ELSE
EXECUTE immediate v_Cmd.dropcmd;
END IF;
dbms_output.put_line(v_Cmd.dropcmd);
EXCEPTION
WHEN OTHERS THEN
NULL; -- ignore errors
END;
END LOOP;
SELECT COUNT(*)
INTO v_ItemCount
FROM ALL_OBJECTS AO
WHERE AO.OWNER = '&USER'
AND AO.OBJECT_TYPE NOT IN ('INDEX','LOB')
AND AO.OBJECT_NAME NOT LIKE 'BIN$%';
END LOOP;
EXECUTE immediate 'purge dba_recyclebin';
END;
/
exit
+`