Disqus - Latest Comments for yas

Re: DBFS

yas — Tue, 23 Jun 2009 09:42:37 -0000

Yes, DBFS is only available in Exadata for now.

Re: Materialized view refresh change in 10G and sql tracing

yas — Thu, 26 Mar 2009 03:27:57 -0000

Srini, did you read about fast refreshed mviews in the documentation? That may be the solution for this. Fast refreshed mviews get only the rows that have been modified in the master table, I did not check if that works for your case but you can give it a try.

Re: Different plans for a sql with the rule hint

yas — Wed, 04 Mar 2009 10:39:48 -0000

Thanks for the link Frits, I was surprised to see different plans for the same sql in the same schema with RBO, Randolf's suggestion made perfect sense.

Re: Index block split bug in 9i

yas — Thu, 04 Sep 2008 01:31:37 -0000

I mentioned the bug number in the post.

Re: OTN members, don't change your e-mail account!

yas — Fri, 01 Aug 2008 08:25:48 -0000

Thanks Tonguc, their ignorance of user problems sometimes really annoys me.

Re: Materialized view refresh change in 10G and sql tracing

yas — Fri, 18 Jul 2008 09:40:12 -0000

Why not?

Re: Materialized view refresh change in 10G and sql tracing

yas — Mon, 05 May 2008 02:29:02 -0000

brave, I think you need to make that decision based on what you like to do. Do you like being a developer, developing applications, coding in what language you prefer, etc... Having a development background for a DBA is a very big plus, you will see its advantages if you decide to become a DBA.

I myself started as a developer and switched to the DBA job after a few years. I like developing applications but the DBA work was more appealing to me at that time.

So, you need to think about what you like doing.

Re: Materialized view refresh change in 10G and sql tracing

yas — Mon, 05 May 2008 02:23:03 -0000

DJ, I have tried it again now. Last time I could not see a truncate in the trace file. Now I reproduced it. I must have done something wrong the last time.

Setting atomic_refresh to false truncates the table, thanks for the correction.

Re: Materialized view refresh change in 10G and sql tracing

yas — Fri, 02 May 2008 06:57:26 -0000

Sure I did, it does not truncate the table.

Re: Relational algebra: division in sql

yas — Thu, 17 Apr 2008 02:21:04 -0000

elai, yours also works.

Re: Disqus

yas — Tue, 15 Apr 2008 04:36:21 -0000

That may be right, Laurent :-) I realized you disabled it today. I have been thinking about the advantages and disadvantages.

Re: Collect in 10G

yas — Fri, 11 Apr 2008 16:22:22 -0000

The removed comment above was a duplicate of my previous comment.

Adrian, I just use the standard html anchor tag when posting comments, it seems it works. Anyway, the link to your article can be accessed in my comment. Thanks again for referring to that article.

Re: Collect in 10G

yas — Fri, 11 Apr 2008 16:16:28 -0000

Adrian, thanks for the comment. I have read your post, it is here for anyone interested.

It is a nice article and shows a good example of where to use COLLECT. I agree that COLLECT should be used where it is appropriate, like your or Laurent's example. Its purpose is definitely not bulk binding.

Re: the thorny issue of blog comment ownership - Digging in a Habari sandpit

yas — Fri, 11 Apr 2008 09:31:07 -0000

This dual posting thing may be the solution. If I decide to quit using Disqus I would want the comment to stay in place.

A strong export-import feature in Disqus can be another solution. I would want to import the comments to the blog when I want. As far as I have read the export features of Disqus is not mature yet. But as Andy said before those guys are listening to the users. We may have that feature soon.

Re: Disqus comments

yas — Fri, 11 Apr 2008 05:38:23 -0000

Laurent, actually your comment on my blog was my first in Disqus. I have recently enabled it too. I have seen it in Andy's blog here.

I have been looking for a comment tracker to keep track of my comments to other blogs and discussions related to a post. I have tried Cocomment but I was not satisfied.

Disqus gives nice looking comments, shows the relation between comments beautifully and gives a dashboard where I can see all my comments and other people's comments in a single page. It looks promising.

Re: Relational algebra: division in sql

yas — Thu, 10 Apr 2008 08:08:38 -0000

Sorry, you are using a different sql in your last post. That does not work in 10.2 either.

Re: Relational algebra: division in sql

yas — Thu, 10 Apr 2008 07:32:36 -0000

Laurent, it works in 10.2.0.2. I did not try it on 10G R1.

SQL> r
1 select sid from
2 (select sid,cast(collect(parts_t(pid)) as parts_tt) x from catalog group by sid)
3 where
4* ((select cast(collect(parts_t(pid))as parts_tt) from parts)) submultiset x

SID
----------
1

SQL> select * from v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bi
PL/SQL Release 10.2.0.2.0 - Production
CORE 10.2.0.2.0 Production
TNS for Solaris: Version 10.2.0.2.0 - Production
NLSRTL Version 10.2.0.2.0 - Production

Re: Relational algebra: division in sql

yas — Thu, 10 Apr 2008 07:09:54 -0000

Laurent, thanks for the great solution. I did not even know something like submultiset was available.

For the ones interested: submultiset does not exist in 9.2, it comes with 10G R1. It is used to find out if a nested table is a subset of another nested table. Documentation about it is here

Thanks again Laurent.

Re: Relational algebra: division in sql

yas — Thu, 10 Apr 2008 02:09:23 -0000

In this case it works. In some other cases it might not. Suppose products have some properties like color. What if I want the suppliers supplying all the red parts?