man crontab
SunOS 5.10          Last change: 10 Nov 2005

User Commands                                          crontab(1)
     A crontab file consists of lines of  six  fields  each.  The
     fields  are  separated by spaces or tabs. The first five are
     integer patterns that specify the following:

     minute (0-59),
     hour (0-23),
     day of the month (1-31),
     month of the year (1-12),
     day of the week (0-6 with 0=Sunday).

so far so good. But read this

     Each of these patterns can be either  an  asterisk  (meaning
     all legal values) or a list of elements separated by commas.
     An element is either a number or two numbers separated by  a
     minus sign (meaning an inclusive range). Time specified here
     is interpreted in the timezone of the cron(1M) daemon, which
     is  set system-wide in /etc/default/init. Entries do not use
     the invoking user's timezone. The specification of days  can
     be  made  by  two  fields  (day  of the month and day of the
     week). Both are adhered to if specified as a  list  of  ele-
     ments. See .

See .

Let’s imagine you want to run a job today, Thursday May 15, 2008 at 2:15pm
You write:
15 14 15 05 4 /tmp/run-my-job

The job will be run Today at 2:15, next year Friday May 15, 2009 at 2:15pm and next week Thursday May 22, 2008 at 2:15pm…

The correct method is to use
15 14 15 05 * /tmp/run-my-job

Specifying both day of week and day of month is not what I expected

A question was posted on the french forums of developez.net about how to drop all objects of an user. The drop user toto cascade; followed by create user toto identified by tott; was suggested as an easy answer, but I commented that create user must re-grant quotas, roles, system privileges, table privileges. Create user must also set the correct security status of the account (password, case-sensitive password, lock status, expiration status, profile), and the password history and failed login history is lost. Also it must set the default and temporary tablespaces.

It is also important to note that “drop user” requires dba privileges, when dropping the own object does not require privileges

To drop all objects I tried with plsql and a dictionary loop.

select object_type, count(*) 
from user_objects 
group by object_type;

OBJECT_TYPE           COUNT(*)
------------------- ----------
INDEX                        6
TYPE BODY                    1
INDEXTYPE                    1
PROCEDURE                    1
JAVA CLASS                   2
JAVA RESOURCE                1
JAVA SOURCE                  1
FUNCTION                     1
TABLE                       10
TRIGGER                      1
TYPE                         1
MATERIALIZED VIEW            1
DATABASE LINK                1
PACKAGE BODY                 1
CLUSTER                      1
DIMENSION                    1
OPERATOR                     1
SEQUENCE                     1
PACKAGE                      1

19 rows selected.

purge recyclebin;

Purge successfully completed.

PL/SQL procedure successfully completed.

select * from user_objects

no rows selected.

All objects of the current schema disappeared, do not try this as sys, this script is destructive with no confirmation

Reprased, how to select distinct collection?

select job, collect(distinct deptno) deptnos 
from emp group by job;

JOB       DEPTNOS
--------- -------------------------------------------
ANALYST   SYSTPTJCzBffh0AjgQ59n0o3QCA==(20)
CLERK     SYSTPTJCzBffh0AjgQ59n0o3QCA==(10, 20, 30)
MANAGER   SYSTPTJCzBffh0AjgQ59n0o3QCA==(10, 20, 30)
PRESIDENT SYSTPTJCzBffh0AjgQ59n0o3QCA==(10)
SALESMAN  SYSTPTJCzBffh0AjgQ59n0o3QCA==(30)

5 rows selected.

select distinct collect(distinct deptno) deptnos 
from emp group by job;

ERROR at line 1:
ORA-22950: cannot ORDER objects without MAP or ORDER method

the message is clear, i need a MAP or ORDER method. Ok, I can do this

create type tt_n as table of number(2);
/

Type created.

create type tt_n_ord as object(
  c tt_n,
  order member function 
    eq (tc tt_n_ord) return integer);
/

Type created.

create type body tt_n_ord as
  order member function 
    eq (tc tt_n_ord) return integer
  is
  begin 
    if c=tc.c 
    then return 0; 
    else return 1; 
    end if;
  end;
end;
/

Type body created.

select distinct 
  tt_n_ord(cast(collect(distinct deptno) as tt_n))
from emp group by job;

TT_N_ORD(CAST(COLLECT(DISTINCTDEPTNO)ASTT_N))(C)
------------------------------------------------
TT_N_ORD(TT_N(30))
TT_N_ORD(TT_N(10))
TT_N_ORD(TT_N(10, 20, 30))
TT_N_ORD(TT_N(20))

4 rows selected.

Please test here and give feedback

Warning: this changed the behavior of old posts too, so I have to reformat all older posts to no longer use < in code

Still waiting for AIX…

Let’s build a different test case.

You have a view that contain an order by. You want to retrieve the last 5 records. However you do not have access to the sort column.

SYS@LSC01> GRANT CREATE VIEW TO USER_A IDENTIFIED BY A;

Grant succeeded.

SYS@LSC01> GRANT SELECT ON SCOTT.EMP TO USER_A WITH GRANT OPTION;

Grant succeeded.

SYS@LSC01> CREATE VIEW USER_A.V AS SELECT ENAME FROM SCOTT.EMP 
ORDER BY HIREDATE;

View created.

SYS@LSC01> GRANT CREATE SESSION TO USER_B IDENTIFIED BY B;

Grant succeeded.

SYS@LSC01> GRANT SELECT ON USER_A.V TO USER_B;

Grant succeeded.

SYS@LSC01> CONNECT USER_B/B
Connected.
USER_B@LSC01> SELECT ROWNUM, ENAME FROM USER_A.V WHERE ROWNUM<4;
    ROWNUM ENAME
---------- ----------
         1 SMITH
         2 ALLEN
         3 WARD

USER_B@LSC01> SELECT R, ENAME FROM
  2    (SELECT ROWNUM R,ENAME
  3    FROM USER_A.V
  4    ORDER BY ROWNUM DESC)
  5  WHERE ROWNUM<4 ORDER BY R;
         R ENAME
---------- ----------
        12 MILLER
        13 SCOTT
        14 ADAMS

Here we have a sorted view. The OP had an external file. It could be an XML input, or any table or collection that is sorted but does not have a sort key

The main reason I switched back to last week behavior is that the COMMENT FEED does not work any longer. And I hate changes that annoy my readers.

I will keep looking for a comment plugins that allow posting of code

SQL> create or replace directory alert as
  2    '/app/oracle/diag/rdbms/lsc01/lsc01/alert';

Directory created.

SQL> var c clob
SQL> declare
  2     b bfile := bfilename('ALERT','log.xml');
  3  begin
  4     dbms_lob.open(b,dbms_lob.file_readonly);
  5     dbms_lob.createtemporary(:c,true);
  6     dbms_lob.loadfromfile(:c,b,dbms_lob.lobmaxsize);
  7  end;
  8  /

PL/SQL procedure successfully completed.

SQL> select extractvalue(xmlparse(content :c),
  2    '/msg[@time="2008-03-30T01:01:13.704+01:00"]/txt/text()')
  3  from dual;
EXTRACTVALUE(XMLPARSE(CONTENT:C),'/MSG[@TIME="2008-03-30T01:01:1
----------------------------------------------------------------

Starting ORACLE instance (normal)

I have been looking for such a plugin for a very long time (and was too foul to develop it myself).

The amazing bonus with Disqus is that you can post code! Your x<1 will be code in code, not a pseudo html tag annoying more than one of my fellow reader.

Feel free to test it on this post.

Thanks to Yas for making me discover this on : Oracle Today

I hope I will not have have to many issues with this new plugin! Feedback welcome