CREATE DIRECTORY Does not Create Any Directory in My File System Hard Disk

Question

create or replace directory emp_dir
as 'D:\emp_direc';
Main Question:
*1. Transaction succeeded, but i have not seen emp_direc created in my D: drive. I'm running Vista Home Edition x32. Any idea why directory does not show up?*
Optional:
Extra info:
after creating a directory i did: - avoid comment sign
--create table oldemp ( fname char(25), lname char(25) )
--organization external
--(type oracle_loader
-- default directory emp_dir
-- access parameters
-- ( records delimited by newline
-- nobadfile
-- nologfile
-- fields terminated by ','
-- (fname position(1:20) char,
-- lname position(22:41) char)
-- location ('emp.dat')
--parallel 5
--reject limit 200;
Table created successfully, then I did
describe oldemp;
Name NULL Type
FNAME CHAR(25)
LNAME CHAR(25)
2 rows selected
Extra questions:
*2. emp.dat carries all the table data which can make data more portable to different oracle servers. However, it is one time operation, once table is populated, i can not update, insert, delete any rows. Thats what i know, if i'm wrong please let me know. If what i said is true, just confirm it if you don't mind...*
*3. Parallel 5, allows five oracle servers to deal with the emp.dat file at the same time. So won't there be any conflict! Maybe one server wants to read a certain data while the other server wants to delete it. Can you clarify please....*

Answer 1

user11164565 wrote:
create or replace directory emp_dir
as 'D:\emp_direc';
Main Question:
*1. Transaction succeeded, but i have not seen emp_direc created in my D: drive. I'm running Vista Home Edition x32. Any idea why directory does not show up?*
<snip>
From the fine SQL Reference Manual found a tahiti.oracle.com, in the prerequisites for the CREATE DIRECTORY command:
For file storage, you must also create a corresponding operating system directory, an ASM disk group, or a directory within an ASM disk group.
Your system or database administrator must ensure that the operating system directory has the correct read and write permissions for Oracle Database processes.
Privileges granted for the directory are created independently of the permissions defined for the operating system directory, and
the two may or may not correspond exactly. For example, an error occurs if sample user hr is granted READ privilege on the directory object but
the corresponding operating system directory does not have READ permission defined for Oracle Database processes.