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Setting PostgreSQL psql Variable Based Upon Query Result

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When using PostgreSQL‘s psql command-line tool to interact with a PostgreSQL database via operator interaction or script, it is not uncommon to want to set psql variables based on the results of a particular query. While PostgreSQL’s procedural language PL/pgSQL supports approaches such as SELECT INTO and assignment (:=) to set PL/pgSQL variables based on a query result, these approaches ...

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Using Docker to Build Debian Packages

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Building Debian packages isn’t always fun. If you’ve ever tried to turn some software into a .deb package, chances are you were either overwhelmed by the sheer number of available build tools and file formats or you messed up your system in an attempt to satisfy all of the package’s dependencies. There are many things that can, and initially will, ...

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Parameterized integration tests with Spring JUnit Rules

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Spring 4.2 comes with brand new JUnit rules: SpringClassRule and SpringMethodRule. The main advantage of using JUnit rules is to let developers get rid of SpringJUnit4ClassRunner and utilize different JUnit runners in Spring integration tests. I think the biggest opportunity with Spring JUnit Rules is the ease of creating parameterized integration tests. The code to be tested For the purpose ...

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Building A Chat App With Codename One Part 5

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The chat UI is what we’ve been working at and in todays post we are going to build exactly that! Even better…​ We’ll integrate with Pubnub to make the app almost fully functional as a rudimentary chat app, which is pretty spectacular. In this section we’ll cover UI, storage (externalization), Pubnub & its JSON API…​ We’ll also use InteractionDialog to ...

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On programming in the summer

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In the summer my training and consulting business gets quiet. That allows me to take some holiday and to pursue some stuff I don’t get much time for otherwise. This summer I’ve picked up a programming idea I started last summer, worked on over Christmas and still haven’t finished. This means I’m programming! It is getting close to 10 years ...

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How to Use Continuous Planning

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If you’ve read Reasons for Continuous Planning, you might be wondering, “How can we do this?” Here are some ideas. You have a couple of preconditions: The teams get to done on features often. I like small stories that the team can finish in a day or so. The teams continuously integrate their features. Frequent features with continuous integration creates an ...

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Procedure-Like Functions in PostgreSQL PL/pgSQL

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PostgreSQL does not support stored procedures in the sense that a database such as Oracle does, but it does support stored functions. In this post, I look at a few tactics that can make the use of a stored function in PostgreSQL (stored function and its calling code both written in PL/pgSQL) feel like using a stored procedure. These simple ...

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