How do we find if any changes in a table

Question

Hi All,
We have created some tables in an user. when ever we create any table that table name or object name stored in All_objects like that.
if we see that table (all_objects). we can find when table has created and when last DDL performed on respective tables.
i would like to know when table has created (when DDL performed )
along with when DDL performed on that table like
1> one day i can drop constraints.
2> one day i can desiable/enable constarints.
3> one day i can add/change column name/ data type or null to not null.
4> one day i drop some columns
i wanted to know when i have created table and when i changed any above mentioned cases. where can we track historical or at least latest changed.
Regards,
venkat
Edited by: user635973 on Apr 2, 2009 12:44 AM

Answer 1

user635973 wrote:
Suppose if I create any triggers. It won’t create any problem in database but we are using ORACLE WAREHOUSE BUILDER (OWB 10gr2) for extract, transform and loading. I am sure about OWB creates problem for data extract, transform and loading.
What to do? Do you have any way to find out? Well, triggers do obviously have a small impact on performance, but that will depend on exactly what you are doing and how much you're doing it.
How it effects OWB I don't know. The only time I ever used OWB was when evaluating ETL tools and came to the conclusion that it was a) a complete P.I.T.A. to install as the documentation led us all over the place and b) it was only any good at loading data into Oracle, not at getting data out again (certainly not as XML anyway).