I am sure someone has a reason for creating a column with a ROWID datatype
but I cannot think of it. Every row has a ROWID column anyway so why
create another one. That column would have to be kept update on almost any
kind of DDL performed on that table. I cannot imagine populating
that field with any other value than actual ROWID which you already have.
Rick
"Boivin, Patrice
J" To: Multiple recipients of list
ORACLE-L <[EMAIL PROTECTED]>
<[EMAIL PROTECTED] cc:
mpo.gc.ca> Subject: ROWID datatype columns and
primary keys
Sent by:
[EMAIL PROTECTED]
02/21/2002 01:18
PM
Please respond to
ORACLE-L
Can someone explain to me why some developers like to create ROWID datatype
columns in their tables?
I am wondering why they sometimes do that instead of using primary keys.
I searched for info on this on the Web, but nothing.
ROWID access is probably faster than index access, I guess.
I vaguely remember my Oracle instructor saying about four years ago that
using ROWIDs was bad practice in most cases, but I can't remember exactly
why he said that.
ROWIDs are not reliable, when exports/imports take place and between
COMMITS
if many users access the same table, if the row could be dropped and
re-created.
Are there other reasons why someone might not want to use ROWID columns?
I am just fishing for opinions.
Thanks.
Regards,
Patrice Boivin
Systems Analyst (Oracle Certified DBA)
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