About Lukas Eder

Lukas is a Java and SQL enthusiast developer. He created the Data Geekery GmbH. He is the creator of jOOQ, a comprehensive SQL library for Java, and he is blogging mostly about these three topics: Java, SQL and jOOQ.

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Does Java 8 Still Need LINQ? Or is it Better than LINQ?

LINQ was one of the best things that happened to the .NET software engineering ecosystem in a long time. With its introduction of lambda expressions and monads in Visual Studio 2008, ...
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Why Staying in Control of Your SQL is so Important

Lots of blog posts and research papers are written about the topics of scaling up and scaling out. This interesting blog post, for instance, sheds some light on the two strategies with ...
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Top 5 Useful Hidden Eclipse Features

Eclipse is a beast. A device whose mystery is only exceeded by its power. Some would call it a continuum transfunctioner. Others would call it a transmogrifier. Yes, it is so huge, ...
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Add Some Entropy to Your JVM

Being able to generate true random numbers depends on the entropy in your system. Some claim, that this can be guaranteed by fair dice roll. Others think that replacing the OpenJDK’s ...
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SQL Trick: row_number() is to SELECT what dense_rank() is to SELECT DISTINCT

The SQL:2003 standard ranking functions are awesome companions and useful tools every now and then. The ones that are supported in almost all databases are:ROW_NUMBER(): This one ...
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Java Auto-Unboxing Gotcha. Beware!

What do you think that the following code snippet will print?                     Object o = true ? new Integer(1) : new Double(2.0); System.out.println(o); Yes! ...
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The 10 Most Popular DB Engines (SQL and NoSQL)

How to objectively measure the popularity of a DB engine? Good question! And there’s an Austrian company (Solid IT) who claims to have the answer. The company focuses on “Big Data ...
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The Premature Return to SQL

In online communities, the NoSQL topic (much like the ORM topic) is a guarantee to stir emotions. Many emotions are stirred by evangelists on either side for ideological or marketing ...
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How to Speed Up Apache Xalan’s XPath Processor by Factor 10x

There has been a bit of an awkward bug in Apache Xalan for a while now, and that bug is XALANJ-2540. The effect of this bug is that an internal SPI configuration file is loaded by Xalan thousands ...
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Why PostgreSQL is so Awesome

Just recently, I’ve blogged about PostgreSQL 9.3 having been released, which is awesome enough as PostgreSQL finally supports materialised views and updatable views. I have then blogged ...
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