The Next Big Thing

Oracle’s 12.1.0.2 was released a few weeks ago (You can download it from OTN here: Oracle 12.1.0.2 Download). While technically a minor point release, it contains a couple of major features that would normally be rolled out in a more substantial version change like 12cR2 or perhaps V13. Of course the most highly anticipated feature is a new option (Oracle In-Memory Option) that provides a column (more...)

Sqlnet tracing during nightly hours…

A TNS error at night…

Sometime ago my data warehouse colleague came to me with a TNS error. At night times he runs his batch jobs in order to update his data warehouse. That night one of his jobs did not run properly and generated an ORA-12592 error. He had to restart this job during daytime.

It turned out it was not the only occurrence of this TNS error. A couple of days later he (more...)

%sql: To Pandas and Back

A Pandas DataFrame has a nice to_sql(table_name, sqlalchemy_engine) method that saves itself to a database.

The only trouble is that coming up with the SQLAlchemy Engine object is a little bit of a pain, and if you're using the IPython %sql magic, your %sql session already has an SQLAlchemy engine anyway. So I created a bogus PERSIST pseudo-SQL command that simply calls to_sql with the open database connection:

%sql PERSIST mydataframe

The result is (more...)

Renaming an Oracle Apache Target in EM12c

When installing Enterprise Manager 12c, the host value can come from a number of places for different applications/tiers.  For most, it comes from the environment variable $ORACLE_HOSTNAME, (for Windows Servers, %ORACLE_HOSTNAME%).

The OHS1 target, aka Oracle Apache in the middle tier of the EM12c environment pulls it’s value from the etc/hosts file, (for Unix as well as Windows) and so it is vulnerable with a virtual host name or host name change occurs.  (more...)

Dealing with Wi-Fi Problems the DBA Kevlar Way

As much as KSCOPE 14 fixed any and all Low-T levels, it couldn’t do anything for our the WiFi problems we were experiencing back in May. I’ve been a telecommuter for almost 4 straight years now and was quite frustrated when our WiFi service became dismal back then.

We called Comcast service and worked through trouble-shooting with their support multiple times, only afterward, still unable to download files or watch Netflix into the first three (more...)

Integrated Application Heartbeat for Oracle GoldenGate

Over the last two weeks I’ve been working on a heartbeat monitoring solution for a client.  This is not the normal heartbeat solution provided by Oracle as described in note 1299679.1; yet very similar.  The approach that I configured is similar to a traditional heartbeat setup but uses the same extract and replicats already being used by the database/application.  For simplicity reasons, I like to call this approach an Integrated Application Heartbeat.

In order (more...)

Autoformat ANY amount item, anywhere

If you’re building a “finance-ey” application you probably have plenty of fields that should show and accept monetary amounts – and quite possibly these items may be implemented in a variety of ways – ordinary apex number items, edit fields in tabular reports, or even dynamically generated items using APEX_ITEM.text.

In my case I had all three, scattered throughout the application. Our users routinely deal with multi-million dollar amounts and they had trouble checking the amounts visually, (more...)

In-memory Aggregation

The title of this piece is the name given to a new feature in 12.1.0.2, and since I’ve recently blogged about a limitation of the in-memory option I thought I’d pick this feature as the next obvious thing to blog about. This is a bit of a non sequitur, though, as the feature seems to have nothing whatsoever to do with the in-memory option; instead it’s a cunning mechanism combining aspects of the star-transformation (but without the bitmap indexes), (more...)

Mobile Apps for Oracle E-Business Suite

First-rate announcement from Oracle through Steven Chan Blog for Mobile Apps strategy on Oracle eBusiness Suite.  With the rapid advent of social media and our behavior to see everything on smart phones. We as users of Oracle eBusiness suite started feeling old fashioned with the release of Oracle Fusion Applications where everything was coming for [...]

The post Mobile Apps for Oracle E-Business Suite appeared first on ORAERP.COM - Blogs.

★ How BIG is Oracle OpenWorld?

Oracle OpenWorld

Here is how big it was in 2013. Compare it to its size in 2012. It is safe to assume that it will be bigger in 2014!

I will attend this year’s event by invitation from the Oracle ACE Program. Prior to the start of the conference, I will be attending a two day product briefing with product teams at Oracle HQ. It’s like a mini OpenWorld but only for Oracle ACE Directors.

During the (more...)

Remote DML with DBMS_PARALLEL_EXECUTE

A comparison of sucking data into a table over a db link using DBMS_PARALLEL_EXECUTE.

This particular example is based on something I needed to do in the real world, copying data from one database into another over a db link. Datapump is not available to me. Tables in question happen to be partitioned by a date-like number (boo!) hence some of the specific actions in the detail.

I think it’s a good example of (more...)

Adapt – Learn New Things

Nothing lasts forever.  Sand-piles crumble.  Companies rise and fall.  Relationships change.  Markets come and go.  It’s just the nature of things.  Adapt or die.  Personally, I like this feature of life…can’t imagine anything worse than stagnation.  There’s nothing better to me than exploring and learning new things.

As Oracle continues their push into cloud-based enterprise applications, we’re seeing some of that fundamental change play out in the (more...)

die Seilerwerks 2014-08-21 13:35:00

Fresh off the heels of my earlier composite partitioning post, I just ran into this confusing issue:

SQL> alter table p_objects
  2          add partition p201410
  3                  values less than (to_date('2014/11/01','yyyy/mm/dd'))
  4          (
  5                  subpartition p201410_spdts values ('DTS')
  6                 (more...)

Adding New Partitions with Custom Subpartition Definition (Range-List)

As part of a project for work I wanted to create a script that would create a new range partition but also pre-create all the list subpartitions. By default the subpartitions would be created based on the subpartition template. However for various reasons which I won't get into we don't update or use the subpartition template. I wanted to define the subpartition list as part of the ALTER TABLE ... ADD PARTITION statement. I assumed it (more...)

Quiz night

Here’s a script to create a table, with index, and collect stats on it. Once I’ve collected stats I’ve checked the execution plan to discover that a hint has been ignored (for a well-known reason):

create table t2
as
select
        mod(rownum,200)         n1,
        mod(rownum,200)         n2,
        rpad(rownum,180)        v1
from
        all_objects
where
        rownum <= 3000
;

create index t2_i1 on t2(n1);

begin
        dbms_stats.gather_table_stats(
                user,
                't2',
                method_opt => 'for all columns size 1'
        );
end;
/


explain plan for
 (more...)

Book Review: Predictive Analytics Using Oracle Data Miner

My friend and colleague, ACE Director Brendan Tierney, has recently published the reference book Predictive Analytics Using Oracle Data Miner. It is the first comprehensive book on the subject matter. The book is primarily aimed at the Oracle Data Scientist/Data Miner. The other target audience are Oracle developers who implement the data mining models created by the Data Scientists in their applications, e.g. OBIEE. Some of the areas covered are also relevant for Oracle (more...)

Wrapping SQL*Plus

One annoying thing from installing Oracle Database 11g on Fedora, was that the up arrows for command history didn’t work. I decided to fix that today after seeing Lutz Hartmann’s article on rlwrap. Unfortunately, the epel (Extra Packages for Enterprise Linux) package he recommended doesn’t run on Fedora 20. You can read my tale of woe, or skip to the .bashrc function that fixed it when I installed only rlwrap.

Attempting it on yum, (more...)

Time to resurrect blogging!

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...)

Viewing ASM trace files in VIM: Which Way Do You Use?

cafepress_womens_cap_sleeve_tshirt

A couple of people have asked me recently about a classic problem that most DBAs know: how to view ASM trace files in the VIM editor when the filenames start with a + character. To my surprise, there are actually quite a few different ways of doing it. Since it’s come up, I thought I’d list a few of them here… If you have another one to add, feel free to comment. I know that (more...)

OTech Magazine – Summer 2014

OTech Magazine – Summer 2014

OTech magazineThe fourth issue of OTech Magazine, the independent magazine for Oracle professionals, is available. For the summer 2014 issue there are some more personal articles included. Titles vary from The Spiritual Programmer to The Next Generation: Oracle SOA Suite 12c and back via How to protect your sensitive data using Oracle Data Vault.

Download OTech Magazine – Summer 2014 here.

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