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.

Software Development
Lukas EderDecember 21st, 2015
0 54
How to Fill Sparse Data With the Previous Non-Empty Value in SQL
The following is a very common problem in all data related technologies and we’re going to look into two very…
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Core Java
Lukas EderDecember 16th, 2015
0 34
jOOQ Tuesdays: Rafael Winterhalter is Wrestling Byte Code with Byte Buddy
Welcome to the jOOQ Tuesdays series. In this series, we’ll publish an article on the third Tuesday every other month…
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Software Development
Lukas EderDecember 16th, 2015
0 37
SQL GROUP BY and Functional Dependencies: A Very Useful Feature
Relational databases define the term “Functional Dependency” as such (from Wikipedia): In relational database theory, a functional dependency is a…
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Core Java
Lukas EderDecember 13th, 2015
4 57
3 Reasons why You Shouldn’t Replace Your for-loops by Stream forEach
Awesome! We’re migrating our code base to Java 8. We’ll replace everything by functions. Throw out design patterns. Remove object…
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Core Java
Lukas EderDecember 6th, 2015
0 14
A Subtle AutoCloseable Contract Change Between Java 7 and Java 8
A nice feature of the Java 7 try-with-resources statement and the AutoCloseable type that was introduced to work with this…
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Core Java
Lukas EderNovember 10th, 2015
0 49
Beware of Functional Programming in Java!
This isn’t going to be a rant about functional programming, which is awesome. This is a warning about some practices…
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Software Development
Lukas EderNovember 8th, 2015
0 44
How to Find the Longest Consecutive Series of Events in SQL
A very interesting problem that can be solved very easily with SQL is to find consecutive series of events in…
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Software Development
Lukas EderOctober 27th, 2015
0 44
How to Find the Closest Subset Sum with SQL
I’ve stumbled upon this very interesting question on Stack Overflow, recently. Its title is: [How to] compare a number with…
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Core Java
Lukas EderOctober 23rd, 2015
1 68
The Danger of Subtype Polymorphism Applied to Tuples
Java 8 has lambdas and streams, but no tuples, which is a shame. This is why we have implemented tuples…
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