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Tips for Importing Data

I’m currently importing a large amount of spatial data into a PostgreSQL/PostGIS database and realized others could learn from my experience. Most of the advice is not specific to ...
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Signing Digital Certificates with OpenSSL Library

While working on the pgopenssltypes extension I realized that I haven’t discussed how to sign digital certificates using the OpenSSL library. (At least I don’t recall doing so – ...
postgresql-logo

Adding OpenSSL User-Defined Types to PostgreSQL

PostgreSQL supports user-defined types (UDT). These types can be used to provide type-safety on user-defined functions when we would otherwise be forced to use simple BLOB objects. This ...
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Database Threat Models

I finally have a breather and can start working through my backlog of ideas. I start with some background that will make the motivation for subsequent posts clearer. What are the threat ...
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Using rlimit (And Why You Should)

I’ve been going through some old notes and came across a reminder of setrlimit(2). This is a C system call that allows an application to specify resource limitations on a number of ...
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Getting A List of Available Cryptographic Algorithms

How do you learn what cryptographic algorithms are available to you? The Java spec names several required ciphers, digests, etc., but a provider often offers more than that. Fortunately ...
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Getting an Infinite List of Primes in Java

A common problem is to determine the prime factorization of a number. The brute force approach is trial division (Wikipedia, Khan Academy) but that requires a lot of wasted effort if ...
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Fibonacci and Lucas Sequences

This posts touches on three of my favorite topics – math, transferring knowledge through experience (tutorial unit tests) and the importance of research. Most developers are aware ...
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Do You Have Tutorial Unit Tests?

I haven’t posted much recently because I’ve been busy with my new job. This brings up an interesting question – you are busy with a new job a lot when you’ve been doing 6- and ...
java-interview-questions-answers

Creating Maven Source and Javadoc Artifacts

Many people are aware of maven source and javadoc artifacts but don’t know why they would want to create them. I was definitely in this camp – I can see why people want this information ...
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