SCN Blog on The Lars Breddemann Blog

Not a New Year's thing

Thu, 04 Jan 2018 10:31:54 +0000

Happy New Year, dear reader!

I hope you had an enjoyable and relaxing time between Christmas and New Years Eve with your thoughts away from work. I can say, I did.

What's your number?

Wed, 15 Nov 2017 05:05:49 +0000

Have you been using the ISNUMERIC function of MySQL, MS SQL Server or PostgreSQL and wondered what to use in SAP HANA instead? If so, this is the blog post for you.

HANA inverts the Thunderdome law

Tue, 14 Nov 2017 04:35:54 +0000

If you’ve watched “Mad Max Beyond Thunderdome” then " … You know the law: Two men enter, one man leaves …".

HANA, of course, reverses, sorry, disrupts this law by making two (or more) values get out of functions, even when only one input value was provided.

HANA backtrace 36/2017

Sat, 14 Oct 2017 05:59:33 +0000

What to read? Whom to follow? #

One of the important things to pick up in any community is finding out who are the people that usually have good, funny or interesting content. Many community platforms make it easy to find out who are the “leading contributors”, the “heroes”, “aces” etc. Currently, the platform SAP Community is run on struggles with this, big time. It is actually hard to not miss new blog posts, sometimes even if one has subscribed to a specific author.

HANA gets stripped

Mon, 11 Sep 2017 14:00:57 +0000

This is going to be one of those weird blog posts, that basically convey just a single piece of information, but since the new SAP Community platform doesn’t really care for WIKI/document style knowledge storage, I had to come up with a click-bait title to make it a blog post.

A new feature! YAY!?

Sun, 10 Sep 2017 14:00:31 +0000

A recent discussion in the SAP internal JAM community for HANA made me aware of a feature added to HANA SQL starting with HANA 1 SPS 12 (don’t ask the revision, just check the latest), respectively HANA 2 SPS 02 (we don’t speak about SPS 00 and SPS 01, do we?): “calculated columns”.

What HANA needs now is some...

Tue, 15 Aug 2017 14:00:51 +0000

… logging!

Yes, you just got click-baited into reading this advertisement for a product enhancement idea that I posted: Standard logging facility for SQLScript

The idea here is simple: when you write application logic in SQLScript then you very likely want to have the option to log what your program does.

SAP Community? Why?

Tue, 25 Jul 2017 14:00:24 +0000

If you’re reading this, you are likely aware of the ongoing debates, complaints, failures and the general situation around the SAP Community platform and the state of this very community in general, which is why I am not going to point out the many technical and organisational deficiencies. Others have done that well and often.

HANA 2 and two riddle errors

Tue, 20 Jun 2017 14:00:36 +0000

HANA 2 has been out for a while now - even SP01 of it is available already - so I thought it is about time to get more familiar with it.
Using my trusty " skullbox" (HANA in a pocket… ) I installed HANA 2 and realised that I now also will have to have a HANA Cockpit 2.0 installation, to be fully able to use all of the glorious new features.

Eco-friendly slide recycling with HANA

Sun, 02 Apr 2017 14:00:06 +0000

Hey there!

I recently presented a short session on my experiences with developing and debugging non-classic-SAP HANA solutions at the Leading Insights conference in Melbourne (27./28.3.2017).

And since the slides are prepared in a way that they could be used without my talking as well, I thought, I might just post them. So, there they are on slideshare:

Make query hints great again...

Thu, 19 Jan 2017 14:00:26 +0000

In case you ever got frustrated by how 80’s like the SAP HANA hints infrastructure looks like, go and support my improvement idea on SAP Idea place: https://ideas.sap.com/D40094

Go and upvote! Now! :)

Merging right. Some tests with data loading in HANA from Down Under.

Mon, 19 Dec 2016 13:00:12 +0000

Based on SAP HANA SPS 12 (HCP trial)

When Jody Hesch recently send me an email with a question about HANA, he received what everyone receives when sending email questions about HANA. The reply is a version of

I’m done (apparently) – see y’all

Sun, 02 Oct 2016 13:00:15 +0000

SCN is coming to an end as we all know and apparently I managed to get through early. All missions completed and highest level reached. Now, that leaves a feeling of achievement, even early in the week :grin:

HANA in a pocket, a skull and some dirty hands on Linux

Sun, 03 Jul 2016 14:00:00 +0000

DISCLAIMER: this blog describes unsupported and unlicensed use of the SAP HANA software. I describe my personal try-out of a hardware/software combination. It’s not in any way meant to be used productively or recommended to use the software in the way I describe.
If you loose data, waste life-time, money, your good mood or damage anything while trying to do what I describe: that’s all on you and there’s no guarantee, warranty or liability whatsoever from SAP or myself.

On multiple mistakes with IN conditions

Thu, 02 Jun 2016 14:00:59 +0000

Based on SAP HANA SPS 11

Update 1.6.2017 #

Retesting the APPLY_FILTER() approach on rev. 112.07 showed that it is now possible to simply hand APPLY_FILTER() an IN condition with a list of integers.

Modelling Learning Double Action or two things I just learned about modelling in SAP HANA SPS 11

Sun, 29 May 2016 14:00:16 +0000

Far fetched… #

A colleague asked me over a year ago (2015 and SPS 9 … sounds ancient now, I know) whether it is possible to leverage information models in a different SAP HANA instance via SDA (Smart Data Access - look it up in the documentation if you didn’t know this yet).

SAP HANA community alert 260416: new moderator aboard

Sun, 24 Apr 2016 14:00:10 +0000

Dear SAP HANA aficionados

If have not been living under a stone lately and visited the SAP HANA corners of SCN (SAP HANA and In-Memory Computing, SAP HANA Developer Center) recently you surely will have noticed that there is currently one particular person putting in effort, patience and willingness to help others in extraordinary measures.

click – click – doubleclick and nothing happens

Wed, 13 Apr 2016 14:00:53 +0000

Today’s tidbit is one of those little dumb things that happen every now and then and when I think: “Great, now this doesn’t work… WTF…?” Usually that’s a bit frustrating for me as I like to think that I know how stuff works around here (here, meaning my work area, tools, etc.).

Things keep changing around here!

Tue, 16 Feb 2016 13:00:32 +0000

Fellow Community members, readers and otherwise interested!

Today I share a change in the organisation of this community. Last week I returned the moderator and space editor privileges and the duties that come with those.

HANA dude analyses Python error and this happened next… (plus: something with Andy Warhol)

Wed, 06 Jan 2016 13:00:04 +0000

Fresh out of the Christmas/New Year vacation I yesterday received this question from one of my colleagues:

Hi Lars

I am trying to set up a demo to show MDC at FKOM.
I am trying to configure MDC via the Python script method – although I have an issue where I am missing a file – the error from the convertMDC.Py script says “no module named ConfigMgr.Py".
I remember you demoed this method at the Architecture Summit in Sydney – did you come across this issue?"

(He was talking about this nice event and the Multi Database Container feature of SAP HANA.)

Changes, News and Annoucement

Thu, 08 Oct 2015 14:00:15 +0000

Dear all

Since there had been quite big changes happening to me (which will affect my engagement here on SCN) I thought I pen down a few lines about that.

Fiddle riddle – Amazing: stuff gets faster and takes less space!

Sat, 15 Aug 2015 14:00:40 +0000

In Quick notes during a fiddle-session I played around with a table that contained all possible values for a date column.

To fill it I used a FOR LOOP with an INSERT and a COMMIT every 10000 records. That took 9:37 minutes for 3.652.061 records. That’s terrible performance and nothing that needs to be accepted with SAP HANA!

Quick notes during a fiddle-session

Sat, 15 Aug 2015 14:00:22 +0000

For a while now I am working as a Solution Architect for the SAP Custom Development organisation. This is the team you’d call when you want custom-built solutions that perfectly fit into your standard solution landscape.

Doing the trick again

Sun, 26 Jul 2015 14:00:14 +0000

You know illusionists, right?

Folks like David Copperfield, David Blaine or Ricky Jay - we’ve all seen them and were left in awe and amusement when they performed their unbelievable tricks.

The 7th Niceness of new toys’n’tools

Fri, 05 Jun 2015 14:00:37 +0000

If you’re not living behind some red moon and you’re reading this blog, you will likely be aware that SAP HANA SPS 10 had just been released.

With it also the SAP HANA Studio had been improved and extended.

Get your data running simple

Tue, 26 May 2015 14:00:15 +0000

SAP runs simple.

And SAP HANA also runs simple.

Down to the very internal coding this mantra has been followed.

And not just simple, but actually easy and here’s the proof - right out of the SAP HANA JoinEngine :lol:

The parameters you know

Fri, 15 May 2015 14:00:54 +0000

The age old question(s) #

It has been a long standing open question for many SAP HANA administrators:

“Where do I find a list of all the parameters that I can set in the .ini files?”

Free stuff! From the SAP HANA book!! Awesome!!!

Fri, 15 May 2015 14:00:18 +0000

Dear readers and fellow SCNers,

being the income-fixated greedy SAP Press author I am, I hardly ever fail to advertise the book Richard Bremer and I wrote and released last year (see Book Announcement: SAP HANA Administration for the whole ball of wax).

Community criss cross puzzle posting in multiple locales

Mon, 20 Apr 2015 14:00:24 +0000

SAP loves to make a point of eating its own dog food and so lowly SAP clerks like yours-truly are offered the experience to participate in multiple user communities be it SCN or one of the many SAP JAM groups.

Small surprises, well documented

Wed, 25 Mar 2015 14:00:56 +0000

We all noticed it: SAP HANA has grown. A lot, actually.

Let’s begin with a little sentimental look into the past #

What had begun as an in-memory database management system with some funky development artefacts like attribute-, analytic- and calculation views has grown into a huge feature packed platform for data management and processing.

Something new, something old…

Sun, 23 Nov 2014 14:00:00 +0000

People of the ABAP for SAP HANA tribe listen up! Or better: read up! :smile: #

When you logged in to your favorite SCN Space, did you notice any change?

SAP HANA DBA Ninja vs. GEIGOKAI

Fri, 07 Nov 2014 14:00:35 +0000

A common inquiry #

Last week I got two very similar question from colleagues in the consulting teams:

" […] We created a user (“john” with select / execute privileges on “SYS_BI & SYS_BIC” schema.

User can access data using bo tools and all looking good.

When the user logged into hana studio with his userid…

He was able to execute

“CREATE view “stest” as select * from <sys_bic> table…..

Is there any option to block user from creating views using sql script as above.[…]"

I specialise in everything

Tue, 16 Sep 2014 14:00:45 +0000

Just found this on LinkedIn…

Would you want to have your beer produced by someone whose specialisation is also refining and distributing oil and managing waste?

What’s more irritating: why would anyone believe this would make a good impression?

Changes to technical properties row/column store

Mon, 08 Sep 2014 14:00:04 +0000

I just came across SAP note 1850112 - Changes to technical properties row/column store again and found it to be an interesting and reassuring collection of design decisions taken over time.

Book Announcement: SAP HANA Administration

Tue, 02 Sep 2014 14:00:27 +0000

I’ve mentioned it before in a couple of threads and today I am happy to officially and proudly announce:

There is now a pack of paper with my name on, available and waiting to be bought by you.

This is not High Tech, this is not Innovation

Mon, 01 Sep 2014 14:00:16 +0000

Downloading and installing the new revision of SAP HANA is not innovation.

Porting your application to in-memory column store technology is not high tech. This is not the bleeding edge. Here we are in commodity land.

Quantum mechanics in SAP HANA?

Sun, 10 Aug 2014 14:00:22 +0000

based on SAP HANA rev. 81

Just shortly before my vacation starts I thought I leave you with another pearl of knowledge… *cough*cough*

Don’t expect suspense or a proper three act structure - it’s just one of those techie blogs that you might put on your “read later” list and then forget about it… Anyway, that’s how I tell this story.

Is this the gym you pay for but never actually show up?

Thu, 07 Aug 2014 14:00:02 +0000

Seth Godin put it so nicely: Seth’s Blog: Analytics without action

" If you’re not prepared to change your diet or your workouts, don’t get on the scale."

meaning that if you don’t want to actually do something with the insight you gain with analytics then better don’t bother doing them.

Quick note on IDENTITY column in SAP HANA

Tue, 03 Jun 2014 14:00:35 +0000

Not sure you knew this already, but starting with SPS 8 (seemed to work with Rev. 74 as well), SAP HANA comes with an option to have an IDENTITY column in column store tables.

Of groups of serial shoppers…

Wed, 28 May 2014 14:00:03 +0000

based on SAP HANA revision 74

»> update 09.02.2016 «<

If you are trying to work on a similar problem, please make sure to also review the solutions posted in discussion Fetch the first record with 24 hr interval based on first record timestamp. The solutions posted there are much more efficient and solve the problem better in multiple ways.

You got the time?

Tue, 18 Feb 2014 14:00:25 +0000

based on HANA rev. 70

World Time Zones Map

A question came up about timezone handling in SAP HANA.

As you might know SAP HANA offers functions to deal with local time as well as with UTC based time and provides the means to convert between those two.

SAP HANA double-0 revision in “A secret present"

Thu, 12 Dec 2013 14:00:30 +0000

Let’s do this quick and painless!

From SPS 7 (rev. 70.00) SAP HANA doesn’t automatically create concatenated attributes for multi-column-joins anymore.

BANG!

There you go.

Just asked for it (Looking for more info on CONCAT_ATTRIBUTE, Free Space by Unload Columns or Alter Table for hidden concat_attribute columns… ) - just briefly after learning that these concat attributes were there in the first place - and now you got it.

HANA SPS 7 first dazzling highlights

Mon, 02 Dec 2013 14:00:27 +0000

Another half year passed and another SAP HANA SP has just been released.

SAP HANA 1.0 SPS 7 is out in the wild as revision 70.00 (double zero revision, yes Moneypenny :wink: ) and a lot of things had been changed, added and (hopefully) improved.

In the words of others…

Mon, 18 Nov 2013 14:00:47 +0000

If you are the kind of person who rather enjoys listening to people instead of reading through education material, then you might be interested in this:

http://events.sap.com/teched/en/session/8596

Behind this link you find the recording of my SAP TechED session RDP302 - Understanding SAP HANA Database performance, presented by my team lead and colleague Richard Bremer.

Meet me at SAP TechEd in Amsterdam

Sun, 27 Oct 2013 14:00:28 +0000

Let’s keep this brief and simple:

I’m going to be at the SAP TechEd EMEA in Amsterdam that will be on next week.
I’m going to deliver some sessions there, especially my very own RDP302 Understanding SAP HANA Database Performance.
There will be several networking sessions with me as well.

So, if you’re going to be there as well, this might be a chance to meet in person :smile: .

Quick note on Plan Visualization in NetWeaver

Mon, 16 Sep 2013 14:00:22 +0000

Ok, just a very quick note today with loads of screenshots and only a few lines of text. The core statement is (for the ones with little time to their avail):

Missing operations in PlanViz? Not for me! (or you)

Fri, 02 Aug 2013 14:00:44 +0000

based on revision 61 of SAP HANA and SAP HANA Studio

Dear web-diary…

Recently I looked into the execution of a simple information model and discussed it with some fellow CSA guys.

Advertisment – Webinar “Performance in SAP HANA Databases” slide deck

Sun, 02 Jun 2013 14:00:07 +0000

Dear all!

The slide deck for my last weeks Webinar Performance in SAP HANA Databases - Webinar Details are online and can be found here:

Performance in SAP HANA Databases - Webinar Presentation.

A little SAP HANA DBA note on too many trace files...

Sat, 04 May 2013 14:00:16 +0000

+++ update 7.10.2015 - SPS 10

Since this blog was originally published some time ago and many SAP HANA revisions passed and there is meanwhile a supported easy way to do housekeeping around trace files.

Back in the tar pit?

Sat, 04 May 2013 14:00:03 +0000

I’ve now been involved with a couple of SAP HANA projects and I am left astounded. #

Not only by the impressing performance and flexibility our product delivers for certain use cases. I’m much more astounded by the expected level of software maturity of the final project implementations.

SPS 6 ante portas – new features in SAP HANA Studio revision 55

Fri, 03 May 2013 14:00:27 +0000

Just recently our development team released revision 55 of SAP HANA Studio and I was very pleased to see how many improvements had been included this time.

Here’s a quick rundown of my favorites in no particular order:

Automatic testing of BW queries, anyone? Here you go!

Wed, 30 Jan 2013 14:00:57 +0000

Dear readers

This time I’m not presenting you any of my own work but instead want to advertise what my CSA colleague Tobias Kaufmann just published here on SCN:

Automatic Test of Queries with RS Trace Tool. (really well done Tobias!)

HANA quick note – checking my connections and using them securely …

Tue, 22 Jan 2013 14:00:49 +0000

based on revision 48 (SPS 5) of SAP HANA Studio and Database

I just browsed throught the updated SAP HANA Developer Guide, SPS 05, Ver. 1.1, 21.12.2012 (really that date? not even 12.12.12? :-) ) and found something pretty nice in there for ODBC and JDBC users.

Running up that hill – a quick note on improving SAP HANA

Tue, 22 Jan 2013 14:00:41 +0000

based on revision 48 (SPS 5) of SAP HANA Studio and Database

Maybe I’m a grouch about our software design from time to time. Maybe I’ve been working in support for too long and got the ‘problem glasses’ still on. I start using programs and features and rather often it doesn’t take too long that I think ’ oh, now that is awkward’ or ’ hope that this won’t make it into the final release’ (as I’m no developer/alpha/beta-tester, usually it DID make it into the release though…).

Show me the timelines, baby!

Wed, 19 Dec 2012 14:00:26 +0000

Based on revision 46 (SPS 5) of SAP HANA Studio and Database

Hello once again!

While reading through the recently released SPS 05 RKT material (here) (that is, IF you have access to this RKT material), specifically the “What’ New Admin & Monitoring” document I found that the authors mentioned that the plan visualization feature we got in SPS 04 had been improved by adding an execution timeline to the display.

SPS 5 quick note – on NULL values

Wed, 12 Dec 2012 14:00:32 +0000

Based on revision 45 (SPS 5) of SAP HANA Studio and Database

One thing I found a bit annoying with HANA had been the fact that it was not possible to go and change table definitions later on as easily as I was used to from other DBMS.

Say cheese… on taking snapshots with SAP HANA

Mon, 10 Dec 2012 14:00:32 +0000

Based on revision 45 (SPS 5) of SAP HANA Studio and Database

As projects with HANA (just like with any other technology) move on, at some point in time the requirement to perform tests and trainings comes up.

Quick note on cleaning up the SAP HANA Studio folders after upgrade installations

Thu, 29 Nov 2012 14:00:22 +0000

based on rev. 41 of SAP HANA Studio

Dear fellow SAP HANA users!

SAP HANA SPS5 has just been released which means it’s patch-o-clock for my system. As usual, the actual update procedure was straightforward and hassle-free. I still use the manual way to install the upgrade by running hdbsetup.exe - if you’re using the HANA software repository with automatic update enabled then you’re even better off.

You got to fight for your right to … setup tracing

Wed, 21 Nov 2012 14:00:12 +0000

Based on revision 41 of SAP HANA Studio and Database

Dear HANA database tribe,

I know the title of this is cheesy but the topic is actually so not exciting that I had to come up with something to draw your short attention span over

Travelling on to new exciting places...

Thu, 08 Nov 2012 14:00:09 +0000

Dear all!

It’s been a while since my last activity here in SCN - and boy what a while it was :smile: .

In the last couple of months I was travelling to Canada, Australia and New Zealand - partly for SAP and partly as a long vacation Down Under.

How to setup SAP HANA SQL reference web search with your browser

Tue, 19 Jun 2012 14:00:49 +0000

UPDATE, 04.09.2017 #

UPDATE: The HANA documentation has been improved, extended and overhauled a couple of times since the last update to this blog nearly four years ago.

Collecting HANA support information easily

Tue, 19 Jun 2012 14:00:01 +0000

Dear HANA support activists and those who just happen to have to deal with SAP HANA!

When dealing with customer messages a large share of the work is related to collecting required data from the customer’s system. This takes time and requires a service connection to the customer system, which is unfortunately not always available.

Still no silver bullet

Wed, 16 May 2012 14:00:35 +0000

HANA is a great way to waste a lot of money.

Yes, I’m serious here. If you decide to implement this new platform at your site but just copy your coding 1:1 to HANA, you’re going to waste money.

Freshly found HANA Studio (rev. 26) treat…

Wed, 11 Apr 2012 14:00:43 +0000

Dear all,

I haven’t been able to come up with a blog on SCN now for quite some time, just because HANA really keeps me pretty busy.

Anyhow, this piece is something I already published SAP internally and since it was well liked and the work was already done, I thought: why not spend another 5 minutes and put it up to SCN? :wink: Hope you like it as well, although it really is a kind of quick’n’dirty post.

HANA backtrace 05/2012

Sat, 04 Feb 2012 14:00:39 +0000

Welcome back to the first instalment of HANA backtrace for 2012.
Let’s look at what I’ve seen and heard about SAP HANA lately:

Accessing data in a SAP HANA box from ABAP requires the well known database library (DBSL) and there are some new notes on this: SQL hints have a long tradition with nearly all databases and SAP HANA is no exception. Which of these and how are supported by the DBSL is explained in SAP note: #1622681 - DBSL hints for SAP HANA

Courses, Workshops, Certifications and the Future…

Thu, 29 Dec 2011 14:00:02 +0000

It’s been a quite busy time for me lately - which is the reason for the not published blog posts recently.

I’ve held and participated in a week of HANA related workshops in our US headquarter offices in Newtown Square, passed the BW certification exam the following week (in full jet lag condition) and delivered the BW standard course BW360 (BW Performance and Administration) the week afterwards.

HANA backtrace 45/2011

Tue, 15 Nov 2011 14:00:34 +0000

Ok, it’s been more than the planned week since my last post in this series (HANA backtrace 44/2011) but these are very busy times lately for a primary support guy like I am.

HANA backtrace 44/2011

Fri, 04 Nov 2011 14:00:36 +0000

This week I’m starting a new blog post series aimed at the readers that are technically interested in SAP HANA but don’t want to spend hours each week checking every new post, article, forum discussion or sap note about this hot topic.

HANA backup script hint… a little bit more security, please!

Fri, 21 Oct 2011 14:00:39 +0000

+++ UPDATE 23.11.2011 +++

After the release of revision 20 (SPS 03) of the HANA database, some more changes concerning command syntax and system object naming had been identified. The commands in this blog post have been adapted to reflect this.

How most BW performance support messages are solved

Fri, 21 Oct 2011 14:00:15 +0000

As the fourth quarter of the year started everybody seems to check the goals that had been set for this year and what has already been reached. Looking back on the messages I worked on I found a very clear pattern, when the message was about BW on Oracle and performance.

HANA operational concept released to customers

Tue, 11 Oct 2011 14:00:29 +0000

During the past months, HANA made a fairly big wave in the SAP community. Looked like everybody wanted to get the hands onto this and gather some experience with the new piece of technology. With those, tons of questions arisen about how to operate such a system.

SAP Support case “FOR ALL ENTRIES disaster”

Fri, 12 Aug 2011 14:00:18 +0000

Last week a colleague from the WHM (data warehouse management) support team called me to get some assistance with a customer message he was processing.

The customer complained about short dumps with the infamous “TSV_TNEW_BLOCKS_NO_ROLL_MEMORY” error, which is basically the way an ABAP work process reports that it ran out of memory.

Partition count contest!

Tue, 19 Jul 2011 14:00:03 +0000

Let’s have a contest! #

One of my last blog posts started off a discussion (e.g. Bala posted his thought in a blog) about the importance of the partitioning feature for an SAP BW installation.

Short note on Line Item and High Cardinality dimensions

Fri, 15 Apr 2011 14:00:37 +0000

One of the quotes I like most I learned from Tom Kyte from Oracle. It’s one from Artemus Ward:

" It ain’t so much the things we don’t know that get us into trouble.
It’s the things you know that just ain’t so."

Question to SAP Support “Why is partition pruning not working in my BW on Oracle?”

Thu, 14 Apr 2011 14:00:01 +0000

Welcome to the problem

As usual understanding, the meaning and the scope of the question is key for the answer to this question, recently filed by a customer.

So, what is the customer complaining about? What does he mean by “partition pruning”?

“Things change for the better” or “How I enhanced the Oracle DBMS software”

Sun, 06 Mar 2011 14:00:49 +0000

Unexpected Behavior #

Last week during an Oracle workshop with my primary support colleagues in the GSC Ireland I came across something new (at least to me). This alone is not worthy of writing even a short note, as it happens all the time, but this time I really thought “Wow - so there was an impact…!”.

BW/DB Support 101 – Get to know your failing SQL statement

Sat, 26 Feb 2011 14:00:46 +0000

Lately, I’ve been confronted with several customer messages concerning problems with Infocube compression, change runs or roll-ups. For some reason, these standard BW actions, that worked the day before, now started to fail.

BW on Oracle: a performance hunch I see more and more often…

Wed, 19 Jan 2011 14:00:02 +0000

Ok, once again reproducing a problem takes a lot of (waiting-)time for the query to finish.

In the meantime I can also just write a super-short-blog post about a pretty common BW-on-Oracle performance hunch: Inappropriate database optimizer statistics. (yes, ‘inappropriate’ not ‘outdated’!)

A first (BW) issue…

Wed, 05 Jan 2011 14:00:47 +0000

In the second week working in BW support, I noticed that there was a problem reported by customers again and again. The customers complained about “database statistics update fails in process chains” or “brconnect run returns errors”. When checking the relevant log file entries for the actions there was always something like

New shores in sight…

Wed, 05 Jan 2011 14:00:13 +0000

As some of you might have noticed, I haven’t been too active in the DB/OS forums lately. This is because I moved on to a new support team and a new subject for me back in September. Yes, I took the giant leap and moved two offices to the right and am now running with the SAP BW support superheroes ;-)

Quick help for ORA-60 deadlock in BW systems

Tue, 28 Dec 2010 14:00:37 +0000

Today I re-learned a nice option to overcome ORA-60 problems with parallel data loading scenarios.

As most of you will know (from reading note “84348 - Oracle-Deadlocks, ORA-00060” or Michael Braunstein’s Blogs Chasing Oracle deadlocks part I - row level locks/ Chasing Oracle deadlocks part II - block level locks or some other resource) the problem here is caused by Oracle space management on block-level.

Designed to dissappoint

Sat, 27 Nov 2010 14:00:08 +0000

Working in support provides the opportunity to witness the behaviour of individuals and organisations in the face of failure.
Systems stop working, processes break down, money gets lost.

As many companies today have decided to be managed in a structured (maybe even “scientific” way) there are of course also procedures to handle failure. In IT organizations these procedures are especially well-liked (think of the often used ITIL process framework). A major part of such procedures is to define responsibilities. Who is responsible for what? The idea behind this is clear: to avoid unnecessary and unproductive discussions about who has to do what when this or that happens.

Wait a minute – why don’t we have that?

Mon, 25 Oct 2010 14:00:20 +0000

Of course, you look at the other players in your industry, right? You want to know what they are doing and how they do it, right? Maybe you could learn a thing or two as well.

MaxDB weekend magic - save 50% total storage space!

Thu, 21 Oct 2010 14:00:38 +0000

People use assumptions to make decisions.

They do this all the time and insofar, developers are people as well :-)

To be a bit more specific, also database developers make assumptions, One of them is for example that when you query data then you ask for data that is actually there. You want to get some data back.

Note 23345 revised – so what?

Thu, 02 Sep 2010 14:00:02 +0000

Last week I edited note 23345 and after some additional administrative tasks, it had been released yesterday with version 61. Why do I tell you this and why do I write a blog about this?

Oracle 11g training, Day #3 and #4 -FLASHBACK!

Sat, 03 Jul 2010 14:00:47 +0000

Hi folks!

Sorry for missing out the last days. The training had been tough, going out afterwards even tougher ;-) and as soon as the training was over, real-life support work set in again. Therefore all I can provide this time is a “flashback course topics” and here we go (in really no order):

Oracle 11g training, Day #2 – Savepoint!

Mon, 28 Jun 2010 14:00:32 +0000

Ok, second day Oracle 11g training - what have we done today?

Basically, two topics were addressed:

SECUREFILES and TABLE COMPRESSION

SECUREFILES #

Securefiles is (no not the new black) but the new LOB implementation for Oracle 11g.
The old LOB implementation had some drawbacks (although these usually didn’t affect SAP installations, given all recommendations had been implemented correctly) so Oracle re-wrote the whole LOB stuff from scratch.

Oracle 11g training, Day #1 – Savepoint!

Sun, 27 Jun 2010 14:00:53 +0000

Ok, management wisely decided to afford the Oracle 11g training for me and my primary support colleagues (thanks, thanks, thanks!), so this week we find ourselves sitting in a meeting room with Juergen Kirschner (yes, THE J. Kirschner) both as the victims and witnesses of his very own special way to make sure every attendee understands how Oracle works.

SAP Support Case “Why is Oracle writing out so many archivelogs in my BI recently?”

Tue, 15 Jun 2010 14:00:46 +0000

Sometimes support messages have to go a rather long way to finally get a solution.

The following problem came up in a support message recently and since neither the analysis steps nor the solution were obvious, I decided to make a blog out of it.

MaxDB Optimizer Statistics handling without NetWeaver

Wed, 26 May 2010 14:00:56 +0000

Ok, MaxDB is most often used with a NetWeaver on top of it, so this blog is about a niche topic of a niche product.
Wow - that should be enough understatement and un-buzzing for now.

MaxDB ST05-trace fallacy - when sometimes the trace is wrong...

Wed, 28 Apr 2010 14:00:36 +0000

One of the most important analytical tools used to investigate slow running SQL statements is the well-known ST05 - SQL trace. The idea of it is that the ABAP database interface notes down what SQL statement it sends to the database, how long it took to get the result, what selection criteria were used and so on.

ORA-01007 in ABAP stack and what to do about it.

Sun, 25 Apr 2010 14:00:32 +0000

Recently a colleague asked me about how to analyze the following short dump:

 Database error text........: "ORA-01007: variable not in select list"
 Database error code........: 1007
 Triggering SQL statement...: "FETCH NEXT "
 Internal call code.........: "[DBDS/NEW DSQL]"

The error was raised within a standard SAP report with the following statement:

How to run a SAP landscape (or so)

Thu, 15 Apr 2010 14:00:51 +0000

It’s been quite a while since my last blog post and we’ve been pretty busy in the primary support department. A major change for us had been the introduction of “Enterprise Support” (ES) and the offer to customers to not only get support with technical issues but also to get free consulting to a certain degree.

MaxDB Event Dispatcher Intro

Tue, 12 Jan 2010 14:00:36 +0000

Infrastructure software like RDBMS often tends to become feature-rich in many directions. MaxDB is no exception to this, so by reading the documentation there’s a pretty good chance to dig out some features that are rarely seen or used.

MaxDB – On locking mechanisms and how we learn something new each day… Part II

Mon, 19 Oct 2009 14:00:48 +0000

As I promised here’s the second part of my short excurse into the shoals of lock management with MaxDB databases. (The first part can be found MaxDB - On locking mechanisms and how we get to know our MaxDB a bit better each day… Part I)

The others

Tue, 13 Oct 2009 14:00:56 +0000

Ok, I admit, I don’t have a very good idea of MS SQL Server.

I do Oracle and MaxDB - that pretty much is it.

Of course, as a database support guy you always need to peek over the fence to the other DBMS (e.g. working on priority Very High messages during weekends) but this has nothing to do with gaining a certain level of real experience with the ‘other’ DBMS.

MaxDB – On locking mechanisms and how we get to know our MaxDB a bit better each day… Part I

Tue, 13 Oct 2009 14:00:45 +0000

One of the most boring topics within the area of DBMS surely is locking. It’s also one of the topics that most DB users try to avoid as much as possible. Still, it’s utmost important to correctly understand how locking works in the database of choice to be able to work successfully with it and without bad surprises.

A fix is not a solution!

Mon, 07 Sep 2009 14:00:15 +0000

Browsing through closed support messages while looking for a possible approach to a certain Oracle CBO problem I came across a quite problematic issue.

Some support colleagues sometimes seem to focus too much on removing the symptoms of a software defect rather than analysing it correctly and forwarding it to the development team so that they create a fix for it.
Of course, there is a reason behind this kind of message handling: the way the performance of support consultants is evaluated motivates them to focus on message closings.

Questions to SAP-Support (MaxDB): “Data is gone after reboot – where the heck is it?”

Mon, 10 Aug 2009 14:00:49 +0000

From time to time I start to believe that there are certain problems that would not come up anymore, once the topic is documented well enough. My colleagues from the development know that too well as I’m asking for documentation and notes all the time for everything. However, the written documentation does help nothing if it’s not read…

Questions to SAP Support: “How to prevent MaxDB from creating backups to the RUNDIRECTORY?”

Mon, 29 Jun 2009 14:00:59 +0000

Hello, community!

Just a minute ago I got to work on a message where a customer asked:

“Hello support team, could you please tell me how to teach MaxDB
not to save backups to the default RUNDIRECTORY but to a path specified by me?”

What a big impact a little money can have…

Fri, 15 May 2009 14:00:02 +0000

What I dislike in donating #

Really, I’m not too big into making donations.

It’s not that I’m greedy and what to keep everything for me.

It’s also not that I’m parsimonious like Mr Scrooge. Actually, I do want to see some of my money put to use for people that need it more than I do.

‘Mind the gap…’ (#4 – reading query execution plans)

Sun, 10 May 2009 14:00:28 +0000

In my mini-series " Mind the gap" I will try to shed some light on where the little or big differences between MaxDB and Oracle databases are and what to keep in mind when working with them.

SSH/VNC finally reached SAP Support

Wed, 22 Apr 2009 14:00:46 +0000

Just a short note, nothing spectacular today.

After many years of customers asking, complaining and debating, SAP finally supports SSH for remote access to customer systems.

Even more, also VNC connections are finally available for the support of non-Windows-OS-GUIs.

Now step back and start thinking!

Sat, 07 Mar 2009 14:00:41 +0000

The default reaction #

When working in support you get to see a lot of bugs, mistakes and errors.

That’s of course how things are going and there’s not much to whine about.

MaxDB – Space oddities, take II

Mon, 02 Feb 2009 14:00:52 +0000

After the tremendous (and very unlikely) success of the first MaxDB: Space oddities blog, I immediately decided: this must be the voice of the market asking for more.

So here you get it. #

While Oracle DBAs are used to be exposed to features like segment fragmentation (that is, although data is removed from tables/indexes these segments still allocate the same amount of space which won’t be automatically released to the freespace) MaxDB users don’t have to think about this.

MaxDB: Space oddities

Tue, 27 Jan 2009 14:00:55 +0000

MaxDB - Space oddities

Recently a customer came up with the assumption that there is space somehow missing from the database.
Although he deleted a whole lot of data via archiving the data area was still quite filled up.
To investigate he decided to check whether the information visible in DBM GUI are correct.

Understanding database performance for developers

Wed, 07 Jan 2009 14:00:42 +0000

Let’s face it - the really really bad performance issues are usually not due to some weird database bugs. Instead, a wrong system setup or the bad usage of the database prevents a high performance.

MaxDB: Some notes on the INDEX_USED statistic

Thu, 20 Nov 2008 14:00:30 +0000

You may have already wondered about whether a specific index is sensible or if you can save space by dropping it.
For this MaxDB provides statistic information in the INDEXES view.
The column INDEXUSED provides the information if the index had been used at all yet and, starting with MaxDB 7.6 it also shows how often an Index has been used.

‘Mind the gap…’ (#3 – Backup/Restore – Part 2)

Sat, 20 Sep 2008 14:00:21 +0000

Before starting with this blog, I’ve to apologize for being so late with this issue of “Mind the Gap”. Since the last part of this series (‘Mind the gap…’ (#3 - Backup/Restore - Part 1)

Questions to SAP Support: “How to move MaxDB volumes?”

Wed, 10 Sep 2008 14:00:57 +0000

Unlike Oracle, MaxDB does not have a CONTROLFILE to store the location of its files.

Instead, all file locations are stored as common parameters.

A quick look at the parameters section of the KNLDIAG reveals this:

Oracle – Popular Misconceptions: Tables without Segments

Tue, 19 Aug 2008 14:00:40 +0000

Perhaps some of you know the SAP note #825653 Oracle: Common errors in which Martin Frauendorfer collected many “myths” and all-time misconceptions about Oracle databases.

Here’s another one: " For all tables in an Oracle database, there is a segment in DBA_SEGMENTS."

Questions to SAP Support: “How to generate a SQL Script via SQL on MaxDB?”

Sun, 10 Aug 2008 14:00:15 +0000

A customer was facing a problem when generating SQL scripts by using SQL. As this is a common habit in the Oracle world he tried to apply it to his MaxDB.

Oracle Patchset 10.2.0.4 is released – finally.

Tue, 15 Jul 2008 14:00:30 +0000

So after a loooong wait time, it’s finally available to be downloaded by the SAP customers. What a relieve!

Over is the time where tens of patches needed to be installed to run the database on a supported patch level and to avoid trapping into a myriad of nasty optimizer bugs that could render the system unusable.

Oracle Patchset 10.2.0.4 – neat DBMS_STATS enhancement

Thu, 10 Jul 2008 14:00:40 +0000

With release 11g Oracle made many feature enhancements to the database and some of them are now down-ported into the soon-to-be-released patchset 10.2.0.4.

One new feature that I just found by ‘accident’ is the easy comparison of CBO statistics for tables for different points in time.

‘Mind the gap…’ (#3 – Backup/Restore – Part 1)

Mon, 23 Jun 2008 14:00:33 +0000

In my mini-series " Mind the gap" I will try to shed some light on where the little or big differences between MaxDB and Oracle databases are and what to keep in mind when working with them.

Questions to SAP Support: “Is my MaxDB recovery still running?”

Tue, 10 Jun 2008 14:00:53 +0000

Today a customer asked about how to monitor recovery activity on MaxDB.

The typical questions here are: " Is it still running?" and " How long will it take?"

While the last question cannot be answered easily (and most often not at all), since the time necessary to finish a recovery largely depends on the performance of the hardware and the data volume, the first question can rather easily be answered.

Questions to SAP Support: Is ODBC access to the database a good idea?

Sun, 18 May 2008 14:00:26 +0000

Today I got a support message to work on that I believe is of rather broad interest.

Therefore, I decided to “forward” it to the SDN so that all community members can benefit from it.

What you don’t know about MaxDB…

Wed, 07 May 2008 14:00:32 +0000

Every day I’m faced with colleagues, customers, partners or SDN members asking questions about MaxDB.

How can we set up an external backup tool? Why is my index not taken by the optimizer? Can I use MaxDB as a productive system?

Some hints to make handling of oracle datablock corruptions more efficient

Sun, 13 Apr 2008 14:00:24 +0000

When faced with error messages like ORA-1578 Oracle database users just got the task to handle a database block corruption. I’ve already written about this topic before and today I’d like to share some tips and tricks to get this task done quicker.

SDN Wiki Features – what features?

Wed, 12 Mar 2008 14:00:38 +0000

While editing content for MaxDB Wiki here in SDN I wondered how I might return to an older version of the page.

Unlike e.g. MediaWiki http://www.mediawiki.org/ the WIKI engine behind Wikipedia (http://www.wikipedia.org) in the SDN Wiki there is no tab bar “Versions”.

Not my fault – whose then?

Sun, 02 Mar 2008 14:00:04 +0000

I have written some lines about database corruption and the ways to handle them in the past.

The bottom line of everything I wrote (including support notes, SDN blogs, and replies in customer messages) has always been:

How to take care of index corruptions in primary key indexes.

Wed, 20 Feb 2008 14:00:36 +0000

Primary key constraints in Oracle are enforced by using an index. The index does not need to be a unique index, but it has to be possible for the database to look into it and find out if a given key is already present or not.

Point-in-time-recovery considered harmful

Tue, 12 Feb 2008 14:00:12 +0000

When I first got in contact to the possibility to bring back a database to the state it had, when a backup was taken I was not too much impressed.

Debugging the MaxDB Kernel – How to get a Call stack the easy way

Thu, 07 Feb 2008 14:00:42 +0000

A few months ago, I described how to set up and configure the Windows Debugger in order to be able to generate a call stack for a hanging MaxDB thread (see Debugging the MaxDB Kernel on Windows – How to get a Call stack from hanging tasks).

How to “win” in SAP customer messages

Wed, 30 Jan 2008 14:00:17 +0000

Doing the same thing over and over again over a long time usually gives the opportunity to recognize some pattern.

One pattern I found in solving customer messages is the following: The less friendly and the more agressive the customer acts with the message processor the worse is the actual outcome of the message.

Parameters. parameters, parameters … the mantra of db performance troubleshooting

Tue, 15 Jan 2008 14:00:54 +0000

Database performance problems are one of the more complex tasks that brighten the day of a database software supporter.

Each and every single day since I’m doing support for Oracle and MaxDB there had been messages, in which customers complained about bad database performance.

Fragmentation in Oracle LMTS tablespace!

Sun, 09 Dec 2007 14:00:44 +0000

Recently two customers reported independent from each other that their LMTS/ASSM tablespace shows much “fragmentation”. What they meant was, that the repeatedly got errors like:

ORA-1688: unable to extend table SAPWBP./BIC/B0000256000
partition /BIC/B00002560000000000092 by 128 in
tablespace PSAPBWP

‘Mind the gap …’

Wed, 05 Dec 2007 14:00:54 +0000

More and more customers decide to use MaxDB and with that, the number of customers asking for a comprehensive list of differences or a comparison increases as well.

In my mini-series " Mind the gap" I will try to shed some light on where the little or big differences between MaxDB and Oracle databases are and what to keep in mind when working with them.

MaxDB Internals Documentation available for free!

Sun, 18 Nov 2007 14:00:48 +0000

Today I spoke with Jörg Hoffmeister (Product and Development Manager of MaxDB and liveCache). He told me that finally the " MaxDB Internals" Documentation has been released to the public.

Many thanks for that Jörg!

Debugging the MaxDB Kernel on Windows - How to get a Call stack from hanging tasks

Wed, 14 Nov 2007 14:00:42 +0000

Ok, today I’ll show you how to install, setup and use the Windows Debugger to get information about hanging MaxDB kernel tasks.

The first thing we need is obviously a hanging MaxDB session, so let’s produce one!

A dumb mistake … again and again …

Sat, 20 Oct 2007 14:00:57 +0000

Not to long ago I was analyzing a performance issue on a customers system.
In the course of this I needed to see some aggregated data, so I opened a transaction where I can put in custom sql and ran it without removing the number of lines to be returned limitation.

MaxDB Database Studio 7.7 is available!

Sun, 14 Oct 2007 14:00:50 +0000

I’ve recently written about it (Something new is coming up…).

We presented it on the Las Vegas TechEd (and it will also be shown in Munich).

One question was present all the time: When will the new MaxDB Tool for DBAs/Developers be finally available to the (SAP)-public?

Stay up-to-date! How to keep up with the latest changes in SAP notes.

Tue, 09 Oct 2007 14:00:22 +0000

One of my duties in SAP Support is to facilitate the knowlegde transfer from Development to the Supporters. For some time one of the measures I took was to send out every week an email that consisted of all changed/new notes of the last week. The list of notes was liked to the SAP Service Marketplace notessearch (http://service.sap.com/notes) so that my collegues were able to just click on each note and check what was new about it.

Something new is coming up…

Mon, 24 Sep 2007 14:00:26 +0000

For so many years now the DBMGui and the SQL Studio have been the primary graphical interfaces for developers and DBAs to access MaxDB instances.
Beside the many good features and the relative high stability (i remember the early versions of Oracle’s SQL Worksheet in release 9i…) the major drawback has been the fact that these tools were only available on Windows-Systems.

Blogging standard…

Mon, 03 Sep 2007 14:00:47 +0000

As it seems it has become popular to give his readers a glimpse on the bookshelf like it has been practised by many before me (see here , here or here) I will also reveal what is “behind” me. Literally the books are place on top of a locker behind me…

Anybody know OCOPY?

Tue, 21 Aug 2007 14:00:27 +0000

For more than ten years now SAP has provided a unified way to administer the Oracle database via the BR*Tools (Backup/Recovery).

Wether you like the tools or not (if you read We all hate the BR*TOOLS, don’t we? about it, perhabs you’ll at least get used to them) they are used in every SAP installations that runs on Oracle.

Verification Speed…

Tue, 07 Aug 2007 14:00:24 +0000

I recently had to handle a case where a big and important system was rendered unusable by database corruptions. Due to some bad luck and faulty procedures, there was no good backup available. Even worse: the corruption had been detected via transaction abort in the SAP.

Get me my data back! QUICK!

Sat, 04 Aug 2007 14:00:58 +0000

Ok, so your data is gone. You/the report you ran executed a DELETE statement and performed a COMMIT. What to do now?

It is the productive system. So there is no place to discuss that it may have been a great idea to test the report first here. What’s needed is a solution.

Things that happen in support messages that I don’t like… Part II

Mon, 25 Jun 2007 14:00:53 +0000

++ 07.03.2011 ++ UPDATE ++ UPDATE ++ UPDATE ++

The mentioned error message had been improved with Oracle 10.2.0.5 (“Things change for the better” or “How I enhanced the Oracle DBMS software”). Thus, the content of this blog post is only valid for older versions of the Oracle database software.

Things that happen in support messages that I don’t like…

Sun, 24 Jun 2007 14:00:49 +0000

After some years working in support solving messages everybody will have a list of things that do occur over and over again and that never seem to get better.

Today I will start with the most anoying one (at least to me):

We all hate the BR*TOOLS, don't we?

Sun, 17 Jun 2007 14:00:24 +0000

You won’t believe how often we in support get asked about if SAPDBA is available for use with Oracle 10g. Even more customers tell us, how they dislike the BRTOOLS and want the SAPDBA back.

A useful hint on notes

Wed, 25 Apr 2007 14:00:02 +0000

From time to time I get customers asking: ” When will the patch mentioned in note XYZ be available?”.

Most often the disappointing answer has to be: “ The release date won’t be announced until the software is released.” The reasoning behind this policy of information can be disputed – anyhow it is how SAP and its partners currently handle it. We don’t promise dates since there might come up very good reasons to spend some more time on producing the bugfix.

Suck that data out! Connect from Oracle to MaxDB

Wed, 04 Apr 2007 14:00:39 +0000

In one of my former jobs, I had been in charge of a rather small project tracking tool for the engineering department. As buying equipment and ordering services were two of the duties of these engineers these tasks had also been modelled into the tool. Of course, the orders had to be transported into the central financial application. Therefore a meeting with the consultants for that ERP system (no, not ours… they had got the wrong one there… ;-)) was set up.

I can repair your corrupt database!

Tue, 20 Mar 2007 14:00:36 +0000

Years in database support, endless experience and access to a whole bunch of internal notes and guidelines have enabled me (as well as all DB Supporters in SAP) to repair corrupt databases. This obscure technique is of course only available to the initiated and should be used with care. But when applied it works just like a wand: puff – the database is OK again.

A classic in disguise…

Tue, 27 Feb 2007 14:00:59 +0000

In my last blog entry “Starting off with a classic…” I presented a classic issue that may appear when the database software is upgraded.

The problem was that sometimes result sets are delivered to the user in a sorted manner even if no ORDER BY was specified. If the user/developer relies on this order it may be a cause for application errors, as the database don’t guarantee the order if ORDER BY is omitted.

Starting off with a classic…

Tue, 13 Feb 2007 14:00:09 +0000

Every now and then a new version of the database software comes along. Upgrades of Oracle or MaxDB often include major improvements concerning stability and performance. These improvements can and should be read as: things run different now.

SCN Blog on The Lars Breddemann Blog

Not a New Year's thing

What's your number?

HANA inverts the Thunderdome law

HANA backtrace 36/2017

What to read? Whom to follow? #

HANA gets stripped

A new feature! YAY!?

What HANA needs now is some...

SAP Community? Why?

HANA 2 and two riddle errors

Eco-friendly slide recycling with HANA

Make query hints great again...

Merging right. Some tests with data loading in HANA from Down Under.

I’m done (apparently) – see y’all

HANA in a pocket, a skull and some dirty hands on Linux

On multiple mistakes with IN conditions

Update 1.6.2017 #

Modelling Learning Double Action or two things I just learned about modelling in SAP HANA SPS 11

Far fetched… #

SAP HANA community alert 260416: new moderator aboard

*click* – *click* – *doubleclick* and nothing happens

Things keep changing around here!

HANA dude analyses Python error and this happened next… (plus: something with Andy Warhol)

Changes, News and Annoucement

Fiddle riddle – Amazing: stuff gets faster and takes less space!

Quick notes during a fiddle-session

Doing the trick again

The 7th Niceness of new toys’n’tools

Get your data running simple

The parameters you know

The age old question(s) #

Free stuff! From the SAP HANA book!! Awesome!!!

Community criss cross puzzle posting in multiple locales

Small surprises, well documented

Let’s begin with a little sentimental look into the past #

Something new, something old…

People of the ABAP for SAP HANA tribe listen up! Or better: read up! :smile: #

SAP HANA DBA Ninja vs. GEIGOKAI

A common inquiry #

I specialise in everything

Changes to technical properties row/column store

Book Announcement: SAP HANA Administration

This is not High Tech, this is not Innovation

Quantum mechanics in SAP HANA?

Is this the gym you pay for but never actually show up?

Quick note on IDENTITY column in SAP HANA

Of groups of serial shoppers…

You got the time?

SAP HANA double-0 revision in “A secret present"

HANA SPS 7 first dazzling highlights

In the words of others…

Meet me at SAP TechEd in Amsterdam

Quick note on Plan Visualization in NetWeaver

Missing operations in PlanViz? Not for me! (or you)

Advertisment – Webinar “Performance in SAP HANA Databases” slide deck

A little SAP HANA DBA note on too many trace files...

Back in the tar pit?

I’ve now been involved with a couple of SAP HANA projects and I am left astounded. #

SPS 6 ante portas – new features in SAP HANA Studio revision 55

Automatic testing of BW queries, anyone? Here you go!

HANA quick note – checking my connections and using them securely …

Running up that hill – a quick note on improving SAP HANA

Show me the timelines, baby!

SPS 5 quick note – on NULL values

Say cheese… on taking snapshots with SAP HANA

Quick note on cleaning up the SAP HANA Studio folders after upgrade installations

You got to fight for your right to … setup tracing

Travelling on to new exciting places...

How to setup SAP HANA SQL reference web search with your browser

UPDATE, 04.09.2017 #

Collecting HANA support information easily

Still no silver bullet

Freshly found HANA Studio (rev. 26) treat…

HANA backtrace 05/2012

Courses, Workshops, Certifications and the Future…

HANA backtrace 45/2011

HANA backtrace 44/2011

HANA backup script hint… a little bit more security, please!

How most BW performance support messages are solved

click – click – doubleclick and nothing happens