time of the request

Hello

I know it seems a little absurd, but is there some way through which we can find as a matter of how long will take to run, I have a script that tells me how much percentage of query execution had happened, but I want... If there is anyway some way through which we can find the time to be considered for a query to run?
Any help from you guys would be really appreciated.

Thank you
Aurélie

AjinkyaSH wrote:

I know it sounds a bit absurd,

Why do you think that? As this should also explain why it is difficult to answer such a question... and why Oracle didn't estimate ready and available for us to use.

Look at the following example. Exact same query.

SQL> set timing on
SQL> select count(*) from all_objects;

  COUNT(*)
----------
     79687

Elapsed: 00:00:05.41
SQL> select count(*) from all_objects;

  COUNT(*)
----------
     79687

Elapsed: 00:00:01.64

5.5 seconds against 1.6 seconds... And nothing about the modified query. Same query. Same results. To the difference in execution time caused by a query making of costly physical i/o (PIO) and the other making cheaper/o logic (LIO).

How do you determine the duration of the front execution when something like PIO against LIO can make such a huge difference?

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