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Home -> Community -> Mailing Lists -> Oracle-L -> RE: IOT Vs Normal Tables
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Any other known complications?
Alex Hillman
-----Original Message-----
From: Rachel Carmichael [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
>--
>Author: jared still
> INET: jkstill_at_teleport.com
>
>Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
>San Diego, California -- Public Internet access / Mailing Lists
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-- Please see the official ORACLE-L FAQ: 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_01C065F2.519AA4A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; = charset=3Diso-8859-1"> <META NAME=3D"Generator" CONTENT=3D"MS Exchange Server version = 5.5.2448.0"> <TITLE>RE: IOT Vs Normal Tables</TITLE> </HEAD> <BODY> <P><FONT SIZE=3D2>Any other known complications?</FONT> </P> <P><FONT SIZE=3D2>Alex Hillman</FONT> </P> <P><FONT SIZE=3D2>-----Original Message-----</FONT> <BR><FONT SIZE=3D2>From: Rachel Carmichael [<A = HREF=3D"mailto:carmichr_at_hotmail.com">mailto:carmichr_at_hotmail.com</A>]</F= ONT> <BR><FONT SIZE=3D2>Sent: Thursday, December 14, 2000 10:51 AM</FONT> <BR><FONT SIZE=3D2>To: Multiple recipients of list ORACLE-L</FONT> <BR><FONT SIZE=3D2>Subject: Re: IOT Vs Normal Tables</FONT> </P> <BR> <P><FONT SIZE=3D2>IOTs can complicate your life (try looking for the = object name, I freaked </FONT> <BR><FONT SIZE=3D2>when I didn't see the table name)...</FONT> </P> <P><FONT SIZE=3D2>BUT.. I have a table with 2 columns -- the first is = 12 characters and the </FONT> <BR><FONT SIZE=3D2>primary key. The second is one character -- used or = unused. Made no sense to </FONT> <BR><FONT SIZE=3D2>me to create a table and an index when I would = ALWAYS be accessing both </FONT> <BR><FONT SIZE=3D2>columns...... and I got to play with an IOT as = well :)</FONT> </P> <P><FONT SIZE=3D2>Rachel</FONT> </P> <BR> <P><FONT SIZE=3D2>>From: jared still = <jkstill_at_teleport.com></FONT> <BR><FONT SIZE=3D2>>Reply-To: ORACLE-L_at_fatcity.com</FONT> <BR><FONT SIZE=3D2>>To: Multiple recipients of list ORACLE-L = <ORACLE-L_at_fatcity.com></FONT> <BR><FONT SIZE=3D2>>Subject: Re: IOT Vs Normal Tables</FONT> <BR><FONT SIZE=3D2>>Date: Wed, 13 Dec 2000 20:35:31 -0800</FONT> <BR><FONT SIZE=3D2>></FONT> <BR><FONT SIZE=3D2>>On Wed, 13 Dec 2000, Sanjay Kumar wrote:</FONT> <BR><FONT SIZE=3D2>></FONT> <BR><FONT SIZE=3D2>> > Hi,</FONT> <BR><FONT SIZE=3D2>> ></FONT> <BR><FONT SIZE=3D2>> > Can anyone tell me how to see the = performance differences of using IOTs </FONT> <BR><FONT SIZE=3D2>>over the normal tables.</FONT> <BR><FONT SIZE=3D2>> ></FONT> <BR><FONT SIZE=3D2>> > Sanjay</FONT> <BR><FONT SIZE=3D2>> ></FONT> <BR><FONT SIZE=3D2>></FONT> <BR><FONT SIZE=3D2>>I don't think you will see any performance = increase</FONT> <BR><FONT SIZE=3D2>>from an IOT.</FONT> <BR><FONT SIZE=3D2>></FONT> <BR><FONT SIZE=3D2>>You can get the same performance if your query = can</FONT> <BR><FONT SIZE=3D2>>be satisfied by an index without reading the = table.</FONT> <BR><FONT SIZE=3D2>>i.e. the index has all the columns to satisfy = the query.</FONT> <BR><FONT SIZE=3D2>></FONT> <BR><FONT SIZE=3D2>>IOT's just save space and complicate your life. = :)</FONT> <BR><FONT SIZE=3D2>></FONT> <BR><FONT SIZE=3D2>>Jared Still</FONT> <BR><FONT SIZE=3D2>>Certified Oracle DBA and Part Time Perl = Evangelist ;)</FONT> <BR><FONT SIZE=3D2>>jkstill_at_teleport.com</FONT> <BR><FONT SIZE=3D2>>jared_still_at_enron.net</FONT> <BR><FONT SIZE=3D2>></FONT> <BR><FONT SIZE=3D2>>--</FONT> <BR><FONT SIZE=3D2>>Please see the official ORACLE-L FAQ: <A = HREF=3D"http://www.orafaq.com" = TARGET=3D"_blank">http://www.orafaq.com</A></FONT> <BR><FONT SIZE=3D2>>--</FONT> <BR><FONT SIZE=3D2>>Author: jared still</FONT> <BR><FONT SIZE=3D2>> INET: jkstill_at_teleport.com</FONT> <BR><FONT SIZE=3D2>></FONT> <BR><FONT SIZE=3D2>>Fat City Network Services -- = (858) 538-5051 FAX: (858) 538-5051</FONT> <BR><FONT SIZE=3D2>>San Diego, = California -- Public Internet = access / Mailing Lists</FONT> <BR><FONT = SIZE=3D2>>-----------------------------------------------------------= ---------</FONT> <BR><FONT SIZE=3D2>>To REMOVE yourself from this mailing list, send = an E-Mail message</FONT> <BR><FONT SIZE=3D2>>to: ListGuru_at_fatcity.com (note EXACT spelling of = 'ListGuru') and in</FONT> <BR><FONT SIZE=3D2>>the message BODY, include a line containing: = UNSUB ORACLE-L</FONT> <BR><FONT SIZE=3D2>>(or the name of mailing list you want to be = removed from). You may</FONT> <BR><FONT SIZE=3D2>>also send the HELP command for other information = (like subscribing).</FONT> </P> <P><FONT = SIZE=3D2>_______________________________________________________________= ______________________</FONT> <BR><FONT SIZE=3D2>Get more from the Web. FREE MSN Explorer = download : <A HREF=3D"http://explorer.msn.com" = TARGET=3D"_blank">http://explorer.msn.com</A></FONT> </P> <P><FONT SIZE=3D2>-- </FONT> <BR><FONT SIZE=3D2>Please see the official ORACLE-L FAQ: <A = HREF=3D"http://www.orafaq.com" = TARGET=3D"_blank">http://www.orafaq.com</A></FONT> <BR><FONT SIZE=3D2>-- </FONT> <BR><FONT SIZE=3D2>Author: Rachel Carmichael</FONT> <BR><FONT SIZE=3D2> INET: carmichr_at_hotmail.com</FONT> </P> <P><FONT SIZE=3D2>Fat City Network Services -- (858) = 538-5051 FAX: (858) 538-5051</FONT> <BR><FONT SIZE=3D2>San Diego, = California -- Public Internet = access / Mailing Lists</FONT> <BR><FONT = SIZE=3D2>---------------------------------------------------------------= -----</FONT> <BR><FONT SIZE=3D2>To REMOVE yourself from this mailing list, send an = E-Mail message</FONT> <BR><FONT SIZE=3D2>to: ListGuru_at_fatcity.com (note EXACT spelling of = 'ListGuru') and in</FONT> <BR><FONT SIZE=3D2>the message BODY, include a line containing: UNSUB = ORACLE-L</FONT> <BR><FONT SIZE=3D2>(or the name of mailing list you want to be removed =Received on Thu Dec 14 2000 - 11:21:39 CST
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