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Home -> Community -> Mailing Lists -> Oracle-L -> RE: IOT Vs Normal Tables
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Oracle8's export was not updated to be able to export any of the new features (ie IOT's). Gets me every time, even though I know its there. As a result I have refrained from using them again and if I get a chance I am changing the two that are there). I am not sure if Oracle8i has an updated export or not. I would check but today I am being lazy.
-----Original Message-----
From: Alex Hillman [mailto:alex_hillman_at_physia.com]
Sent: Thursday, December 14, 2000 9:31 AM
To: Multiple recipients of list ORACLE-L
Subject: RE: IOT Vs Normal Tables
Any other known complications?
Alex Hillman
-----Original Message-----
From: Rachel Carmichael [ mailto:carmichr_at_hotmail.com
<mailto:carmichr_at_hotmail.com> ]
Sent: Thursday, December 14, 2000 10:51 AM
To: Multiple recipients of list ORACLE-L
Subject: Re: IOT Vs Normal Tables
IOTs can complicate your life (try looking for the object name, I freaked when I didn't see the table name)...
BUT.. I have a table with 2 columns -- the first is 12 characters and the primary key. The second is one character -- used or unused. Made no sense to
me to create a table and an index when I would ALWAYS be accessing both columns...... and I got to play with an IOT as well :)
Rachel
>From: jared still <jkstill_at_teleport.com>
>Reply-To: ORACLE-L_at_fatcity.com
>To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
>Subject: Re: IOT Vs Normal Tables
>Date: Wed, 13 Dec 2000 20:35:31 -0800
>
>On Wed, 13 Dec 2000, Sanjay Kumar wrote:
>
> > Hi,
> >
> > Can anyone tell me how to see the performance differences of using IOTs
>over the normal tables.
> >
> > Sanjay
> >
>
>I don't think you will see any performance increase
>from an IOT.
>
>You can get the same performance if your query can
>be satisfied by an index without reading the table.
>i.e. the index has all the columns to satisfy the query.
>
>IOT's just save space and complicate your life. :)
>
>Jared Still
>Certified Oracle DBA and Part Time Perl Evangelist ;)
>jkstill_at_teleport.com
>jared_still_at_enron.net
>
>--
>Please see the official ORACLE-L FAQ: http://www.orafaq.com
<http://www.orafaq.com>
>--
>Author: jared still
> INET: jkstill_at_teleport.com
>
>Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
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-- Please see the official ORACLE-L FAQ: http://www.orafaq.com <http://www.orafaq.com> -- Author: Rachel Carmichael INET: carmichr_at_hotmail.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). ------_=_NextPart_001_01C065FD.844D8CE0 Content-Type: text/html; charset="iso-8859-1" <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <TITLE>RE: IOT Vs Normal Tables</TITLE> <META content="MSHTML 5.00.2920.0" name=GENERATOR></HEAD> <BODY> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=195253718-14122000>Oracle8's export was not updated to be able to export any of the new</SPAN></FONT></DIV> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=195253718-14122000>features (ie IOT's). Gets me every time, even though I know its there.</SPAN></FONT></DIV> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=195253718-14122000>As a result I have refrained from using them again and if I get a chance</SPAN></FONT></DIV> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=195253718-14122000>I am changing the two that are there). I am not sure if Oracle8i has</SPAN></FONT></DIV> <DIV><FONT color=#0000ff face=Arial size=2><SPAN class=195253718-14122000>an updated export or not. I would check but today I am being lazy.</SPAN></FONT></DIV> <BLOCKQUOTE style="MARGIN-RIGHT: 0px"> <DIV align=left class=OutlookMessageHeader dir=ltr><FONT face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> Alex Hillman [mailto:alex_hillman_at_physia.com]<BR><B>Sent:</B> Thursday, December 14, 2000 9:31 AM<BR><B>To:</B> Multiple recipients of list ORACLE-L<BR><B>Subject:</B> RE: IOT Vs Normal Tables<BR><BR></DIV></FONT> <P><FONT size=2>Any other known complications?</FONT> </P> <P><FONT size=2>Alex Hillman</FONT> </P> <P><FONT size=2>-----Original Message-----</FONT> <BR><FONT size=2>From: Rachel Carmichael [<A href="mailto:carmichr_at_hotmail.com">mailto:carmichr_at_hotmail.com</A>]</FONT> <BR><FONT size=2>Sent: Thursday, December 14, 2000 10:51 AM</FONT> <BR><FONT size=2>To: Multiple recipients of list ORACLE-L</FONT> <BR><FONT size=2>Subject: Re: IOT Vs Normal Tables</FONT> </P><BR> <P><FONT size=2>IOTs can complicate your life (try looking for the object name, I freaked </FONT><BR><FONT size=2>when I didn't see the table name)...</FONT> </P> <P><FONT size=2>BUT.. I have a table with 2 columns -- the first is 12 characters and the </FONT><BR><FONT size=2>primary key. The second is one character -- used or unused. Made no sense to </FONT><BR><FONT size=2>me to create a table and an index when I would ALWAYS be accessing both </FONT><BR><FONT size=2>columns...... and I got to play with an IOT as well :)</FONT> </P> <P><FONT size=2>Rachel</FONT> </P><BR> <P><FONT size=2>>From: jared still <jkstill_at_teleport.com></FONT> <BR><FONT size=2>>Reply-To: ORACLE-L_at_fatcity.com</FONT> <BR><FONT size=2>>To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com></FONT> <BR><FONT size=2>>Subject: Re: IOT Vs Normal Tables</FONT> <BR><FONT size=2>>Date: Wed, 13 Dec 2000 20:35:31 -0800</FONT> <BR><FONT size=2>></FONT> <BR><FONT size=2>>On Wed, 13 Dec 2000, Sanjay Kumar wrote:</FONT> <BR><FONT size=2>></FONT> <BR><FONT size=2>> > Hi,</FONT> <BR><FONT size=2>> ></FONT> <BR><FONT size=2>> > Can anyone tell me how to see the performance differences of using IOTs </FONT><BR><FONT size=2>>over the normal tables.</FONT> <BR><FONT size=2>> ></FONT> <BR><FONT size=2>> > Sanjay</FONT> <BR><FONT size=2>> ></FONT> <BR><FONT size=2>></FONT> <BR><FONT size=2>>I don't think you will see any performance increase</FONT> <BR><FONT size=2>>from an IOT.</FONT> <BR><FONT size=2>></FONT> <BR><FONT size=2>>You can get the same performance if your query can</FONT> <BR><FONT size=2>>be satisfied by an index without reading the table.</FONT> <BR><FONT size=2>>i.e. the index has all the columns to satisfy the query.</FONT> <BR><FONT size=2>></FONT> <BR><FONT size=2>>IOT's just save space and complicate your life. :)</FONT> <BR><FONT size=2>></FONT> <BR><FONT size=2>>Jared Still</FONT> <BR><FONT size=2>>Certified Oracle DBA and Part Time Perl Evangelist ;)</FONT> <BR><FONT size=2>>jkstill_at_teleport.com</FONT> <BR><FONT size=2>>jared_still_at_enron.net</FONT> <BR><FONT size=2>></FONT> <BR><FONT size=2>>--</FONT> <BR><FONT size=2>>Please see the official ORACLE-L FAQ: <A href="http://www.orafaq.com" target=_blank>http://www.orafaq.com</A></FONT> <BR><FONT size=2>>--</FONT> <BR><FONT size=2>>Author: jared still</FONT> <BR><FONT size=2>> INET: jkstill_at_teleport.com</FONT> <BR><FONT size=2>></FONT> <BR><FONT size=2>>Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051</FONT> <BR><FONT size=2>>San Diego, California -- Public Internet access / Mailing Lists</FONT> <BR><FONT size=2>>--------------------------------------------------------------------</FONT> <BR><FONT size=2>>To REMOVE yourself from this mailing list, send an E-Mail message</FONT> <BR><FONT size=2>>to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in</FONT> <BR><FONT size=2>>the message BODY, include a line containing: UNSUB ORACLE-L</FONT> <BR><FONT size=2>>(or the name of mailing list you want to be removed from). You may</FONT> <BR><FONT size=2>>also send the HELP command for other information (like subscribing).</FONT> </P> <P><FONT size=2>_____________________________________________________________________________________</FONT> <BR><FONT size=2>Get more from the Web. FREE MSN Explorer download : <A href="http://explorer.msn.com" target=_blank>http://explorer.msn.com</A></FONT> </P> <P><FONT size=2>-- </FONT><BR><FONT size=2>Please see the official ORACLE-L FAQ: <A href="http://www.orafaq.com" target=_blank>http://www.orafaq.com</A></FONT> <BR><FONT size=2>-- </FONT><BR><FONT size=2>Author: Rachel Carmichael</FONT> <BR><FONT size=2> INET: carmichr_at_hotmail.com</FONT> </P> <P><FONT size=2>Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051</FONT> <BR><FONT size=2>San Diego, California -- Public Internet access / Mailing Lists</FONT> <BR><FONT size=2>--------------------------------------------------------------------</FONT> <BR><FONT size=2>To REMOVE yourself from this mailing list, send an E-Mail message</FONT> <BR><FONT size=2>to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in</FONT> <BR><FONT size=2>the message BODY, include a line containing: UNSUB ORACLE-L</FONT> <BR><FONT size=2>(or the name of mailing list you want to be removed from). You may</FONT> <BR><FONT size=2>alsoReceived on Thu Dec 14 2000 - 12:41:48 CST
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