TweetShareSharePin0 SharesNo I’m not talking about the Oracle Database. It is extremely unlikely that you found your way here if it isn’t already to some extent your specialisation. If you made it here and have no idea what this is about, drop a comment and let me know your path here if that were to be the case. No, this is about Python. Even more it is about the OracleDB module for python. That capitalisation is mine, the official way […]
Author: Mathias
ORDS REST services work but APEX does not
TweetShareSharePin0 SharesThis is an odd situation, most people are probably struggling more with getting REST to work than to get installed APEX to come up with the login. I encountered an odd situation recently where REST worked, SQL Developer Web worked but APEX did not. Many attempts to install and uninstall ORDS and we were still at the same situation. The error message we got was along the lines of “connection pool is a template pool”. Eventually I noticed that […]
When TNS does not work in ORDS
TweetShareSharePin0 SharesThis is probably a short lived blog post. If you are using ORDS 22.4 (the current version as of this writing) you may encounter problems with the TNS-support for setting up connections. I believe they manifest when your TNS-entry has multiple hosts in them as you would if you have a setup with one or more standby databases. In such cases it looks something like this. I believe this is due to the parsing of the file not taking […]
Enable Enterprise Manager Express
TweetShareSharePin0 SharesThere are many blogs about the product and so on. I want to recommend that you enable and give your developers access to it. Setting them up and getting them to scale the mountain of complexity that is the normal Enterprise Manager is probably not what you want to do. However, EM Express is a slimed down version focusing pretty much on just what a developer ought to care about, seeing the processes in the database and data about […]
Add hint to SQL you cannot modify
TweetShareSharePin0 SharesThe last post showed how to lock the plan for a SQL that switched plan every now and then. Another common issue one can encounter is that of a SQL that uses a suboptimal plan and for which you’d want it to use a different plan. The way to instruct the optimiser to use a different plan is to use a hint to cause it to change how it accesses the table. But often the SQL is in application […]
Lock the plan for a SQL
TweetShareSharePin0 SharesA SQL that sometimes just uses a plan you prefer it to not use is fairly common. There are always reasons for unstable plans, but more important than knowing the reason is often to make it stick to a certain plan. This has historically been done with a lots of ways from changing the SQL, adding hints, adding incorrect stats to influence the optimizer, using any of the techniques that came before SQL Plan Management (SPM). All of these […]
Set operators – Union, intersect and minus
TweetShareSharePin0 SharesYou’ve probably combined two queries with “union”, but have you looked at the different options for how to combine queries? The set operators are more combining result sets than they are combining queries even if we often think about it is combined queries. Thy need to return the same number of columns of the same datatypes. The lengths of the columns can differ but not the datatypes. Let’s start with a couple of tables and data so you have […]
Longs in SQL
TweetShareSharePin0 SharesUsing long datatype is a problem we seldom face with new applications. But some old may still have it if they have not managed to convert to somethings easier to work with. But where I most often encounter it is in Oracles tables. The place that by far most often pops up its ugly head is high_value in *_tab_partitions. Just the other day a colleague was stuck on how to grab a portion of its content in SQL. “You […]
The lasting impression #JoelKallmanDay
TweetShareSharePin0 SharesIt feels as if this year the feelings are not too raw anymore to even consider writing about Joel. Can anything new be said that hasn’t been said better by much more important people. Probably not, but their story is not my story. A day honouring Joel is not just a day his name brings out a flurry of blogs and tweets. It is a day to remember who he is. There is no was about Joel, his life […]
CPU, core, factors, threads and licenses
TweetShareSharePin0 SharesDisclaimer 1:Unless you are a paying client, I am not who you take licensing advice from. Talk to your Software License Manager (SLM) if you want to know how many licenses you need or your Oracle sales rep if you want to know how many licenses you could afford with the budget you have. 🙂 That said, Daniel wote a good post about how the hardware side of CPU, cores, oCPU and vCPU works. Go ahead and read it […]