From yosi@comhill.com Fri, 05 Oct 2001 12:50:33 -0700 From: Yosi Greenfield Date: Fri, 05 Oct 2001 12:50:33 -0700 Subject: Re: CTAS use of rollback In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: text/plain Confirmed. "Nicoll, Iain (Calanais)" wrote: > Could anyone tell me whether Create table .. as select .. uses rollback. > > I initially thought it would (despite being a cross between ddl and dml) but > having created a 3.5 million row table and checked the sum of the writes in > v$rollstat it had only done ~130k writes between the start of the ctas and > the end. It also doesn't create the table initially but just has a numbered > object which it seems to rename only at the very end, so if it fails I would > have though it would just drop that object and if it completes successfully > then a commit would be done because of the ddl aspects of the command. > > I tried inserting 10k rows into the same table and this came back with about > 25k writes (seemed reasonable if it's only storing the rowid). Given this > it doesn't seem to be using rollback (other than recording changes to > extents etc) but I'd appreciate confirmation. > > Iain Nicoll > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: Nicoll, Iain (Calanais) > INET: iain.nicoll@calanais.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@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). -- Thanks, Yosi --------------------------------------------------------- Yosi Greenfield Oracle Certified DBA ygreenfield@compuserve.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Yosi Greenfield INET: yosi@comhill.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@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).