First, of all, I would like to thank everybody who came to my presentations on Collab'16! It was a pleasure talking FOR you :-) A lot of nice questions/comments/follow-ups.
Second, some SlideShare uploads (as promised):
- my talk about user-defined functions - that's where I was talking a lot about execution counts and the impact of Cost-Based Optimizer on them:http://www.slideshare.net/MishaRosenblum/plsql-userdefined-functions-in-the-read-world
- updated version of my "Printing without Printers" talk. As usual, I (more...)
Thanks to everybody who visited my presentation! Here is a link to view and/or download the slide set: http://www.slideshare.net/MishaRosenblum/2015-458-rosenblumpptfinal
Feel free to ask questions!
If you want to be able to create contemporary high-performing PL/SQL code, welcome to my training event in NYC (hosted by NYOUG) on November 7, 2014:
I think, it is as important as ever to follow best practices for server-side development. There are lots of options that could get the job done "now", but very few that would survive for months/years. Also, there is a constant pressure from various "alternative" solutions to (more...)
I think, the biggest challenge for people coming to such huge events as Oracle OpenWorld is to navigate through all of the events that simultaneously happen at various locations. You are always under stress that you may miss something, or that you may hit a bad talk, or that you may not even know that there was a talk directly linked to your key production problems.
Finally there is a real guide to OpenWorld - (more...)
It seems to me that I talked about my most recent book everywhere except for my own blog... So, let me introduce you a one and only performance tuning book dedicated to PL/SQL
This book took me much longer to write than I initially anticipated - and to be fair, that's the reason for staying quiet at the blog. I just didn't have time/energy to write everywhere :-) Although, it was fun writing - (more...)
Pretty often I am being asked about various online and printed source of Oracle-related information. Finally I decided to create a blog post here where I will start to accumulate all the goodies that I just "happen" to find. Maybe I will eventually create even some kind of a guide... Let's see.
Before we start - a couple of disclaimers:
* It is my personal
list of favorite resources, so all of the following statements (more...)
Yesterday while working on a real production report I found a requirement that forced me to come up with a bit nontrivial usage of analytic functions. Here is the problem (translated to SCOTT-level terms):
- I have a table that contains a DATE column (HIREDATE)
- Input parameter is also a date (IN_DT)
- For each department I need to show all rows that have HIREDATE after IN_DT plus the most recent row from the (more...)
Less than 3 weeks left before the biggest Oracle event of the year kicks in - and I bet, Oracle OpenWorld'14 will impress anybody (as usual). I am honored to be selected as one of speakers there. Here are my two talks:
"Expanding SQL Horizons: PL/SQL User-Defined Functions in the Real World"
Sunday, Sep 28, 1:30 PM - 2:15 PM
Moscone South - 310
"Calling SQL from PL/SQL the (more...)
Sorry for staying quiet for some time, but for some good reasons. Some of these reasons will be explained in later posts, but for now I would like to share the story I wrote upon request of Steven Feuerstein
, who asked to tell how PL/SQL impacted our life. Here is my story:
I started to work with databases already in college, but more from the data modelling/business analysis angle. When I moved to (more...)
To be fair, I am not spending all of my days writing the new PL/SQL book :-) I even work sometimes! And while solving real problems I reasonably often find interesting thing.
Today I was asked by one of my colleagues: is it possible to look inside of the existing (more...)
Working on the chapter that covers best ways of manipulating with object collection. Of course, if you talk about pagination of the rowset, it is very tempting to test Oracle 12c new feature - OFFSET…FETCH.
Unfortunately, immediately got an issue. It seems to me that passing a variable to FETCH (more...)
Please, don't worry - I didn't suddenly disappear from the surface of the world of databases. It just happened that after some years of staying outside of publishing business I've been recruited to make a new book.The tentative name/dates are: PL/SQL Performance Tuning Guide: Tips and Techniques
(Oracle Press, (more...)
Looks like my Friday post
about BigData got some attention. In that case - let's continue! While looking at tons of articles about Big-anything
I've noticed a very constant pattern - everybody is talking about multi-node clusters of database servers: you constantly hear about horizontal scalability, sharding, node failure tolerance (more...)
Over the weekend one of my friends asked me for a clarification on RESULT_CACHE
- a really interesting functionality that allows Oracle to cache in SGA results of PL/SQL function calls.
The point of confusion was the fact that between 11gR1 and 11gR2 Oracle development team significantly re-thought this feature (more...)
Today at lunch we had an interesting discussion about the role of databases in the contemporary IT development - and there was a lot of buzz-words thrown across the table: Hadoop, NoSQL, BigData, BigUsers, ACID-compliance etc. To be fair, a bit too many buzz-words - I have a very bad (more...)
Yet another performance tuning story
, similar to one that happened about a month ago
. Just to keep it short:
- once upon a time there was a very time-consuming module.
- eventually we were forced to take much closer look - WHY is it so time-consuming
- we found in our own (more...)
This post is the final part of my thoughts about IOUG Collaborate'13 conference (part one
, part two
, part three
). If I will not write I now I will forget what was going on :-), so the last push!4. Real stuff
In all of the previous (more...)
After a couple of requests at IOUG Collab'13 I decided to resurrect a pretty old topic that I've participated in 2008 (since in 5 years there was no changes on that front :-) ).
As we all know, starting version 11g Oracle tracks PL/SQL dependencies in much more granular way (more...)
This post is a continuation of my thoughts about IOUG Collaborate'13 conference (part one
, part two
). As I've been mentioning in the preview
, the whole question of BigData was on my short-list. First of all, I am still trying to figure out what are we talking (more...)
For the Friday evening I decided to dig out my example from the most recent of my published books (Expert PL/SQL Practices, APress, 2011
) - it was a very fun project to work with: first, to come with with the idea of such multi-author book, second, to write a chapter focused on Dynamic SQL.
As one of the examples I decided to illustrate how XMLType can be used as both a collection of (more...)