Table creation - order of events

Question

I am trying to get some help on the order I should be carrying out table creation tasks.
Say I create a simple table:
create table title (
title_id number(2) not null,
title varchar2(10) not null,
effective_from date not null,
effective_to date not null,
constraint pk_title primary key (title_id)
I believe I should populate the data, then create my index:
create unique index title_title_id_idx on title (title_id asc)
But I have read that Oracle will automatically create an index for my primary key if I do not do so myself.
At what point does Oracle create the index on my behalf and how do I stop it?
Should I only apply the primary key constraint after the data has been loaded as well?
Even then, if I add the primary key constraint will Oracle not immediately create an index for me when I am about to create a specific one matching my naming conventions?

Answer 1

yeah but just handle it the way you would handle any other constraint violation - with the EXCEPTIONS INTO clause...
SQL> select index_name, uniqueness from user_indexes
  2  where table_name = 'APC'
  3  /
no rows selected
SQL> insert into apc values (1)
  2  /
1 row created.
SQL> insert into apc values (2)
  2  /
1 row created.
SQL> alter table apc add constraint apc_pk primary key (col1)
  2  using index ( create unique index my_new_index on apc (col1))
  3  /
Table altered.
SQL> insert into apc values (2)
  2  /
insert into apc values (2)
ERROR at line 1:
ORA-00001: unique constraint (APC.APC_PK) violated
SQL> alter table apc drop constraint apc_pk
  2  /
Table altered.
SQL> insert into apc values (2)
  2  /
1 row created.
SQL> alter table apc add constraint apc_pk primary key (col1)
  2  using index ( create unique index my_new_index on apc (col1))
  3  /
alter table apc add constraint apc_pk primary key (col1)
ERROR at line 1:
ORA-02437: cannot validate (APC.APC_PK) - primary key violated
SQL> @%ORACLE_HOME%/rdbms/admin/utlexcpt.sql
Table created.
SQL> alter table apc add constraint apc_pk primary key (col1)
  2  using index ( create unique index my_new_index on apc (col1))
  3  exceptions into EXCEPTIONS
  4  /
alter table apc add constraint apc_pk primary key (col1)
ERROR at line 1:
ORA-02437: cannot validate (APC.APC_PK) - primary key violated
SQL> select * from apc where rowid in ( select row_id from exceptions)
  2  /
      COL1
         2
         2
SQL> All this is in the documentation. Find out more.
Cheers, APC