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Re: Data Access Time

From: Michael Serbanescu <mserban_at_postoffice.worldnet.att.net>
Date: 1998/04/04
Message-ID: <6g4kau$gj@bgtnsc02.worldnet.att.net>#1/1

Select the pseudocolumn ROWID in your query. It has 18 positions in the format xxxxxxxx.xxxx.xxxx. The first 8 positions identify the block #, positions 10 thru 13 identify the row # (first row is 0000) and positions 15 thru 18 identify the datafile #. Use the SUBSTR function to get the block # and datafile # (those 2 values should be of interest to you).

Hope this helps.

Michael Serbanescu



Chen Wei Kian wrote:
>
> Does anyone know if it is possible to check whcih block of data does
> a given query accessed to get the result ? What I am trying to do is
> to count how many block of data has to be accessed for a given query
> to obtain the result. The purpose of doing so is to compare the time
> required for 2 queries to obtain the result. Do you know if there is
> any other alternative way that allow me to so ?
> Wei Kian Chen
  Received on Sat Apr 04 1998 - 00:00:00 CST

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