Heartbleed is a bit over one month old now. A bug significant enough to have its own Wikipedia page. Today, we're going to look into how wrong we have been in assuming that Open Source software is more secure than commercial software, because of our thinking that source code is open and that many developers … Continue reading Free as in Beer has caused Heartbleed (and Much More)
Java 8 Friday: API Designers, be Careful
At Data Geekery, we love Java. And as we're really into jOOQ's fluent API and query DSL, we're absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every Friday, we're showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and … Continue reading Java 8 Friday: API Designers, be Careful
SQL Server Trick: Circumvent Missing ORDER BY Clause
SQL Server is known to have a very strict interpretation of the SQL standard. For instance, the following expressions or statements are not possible in SQL Server: -- Get arbitrarily numbered row_numbers SELECT ROW_NUMBER() OVER () -- Skip arbitrary rows SELECT a FROM (VALUES (1), (2), (3), (4)) t(a) OFFSET 3 ROWS Strictly speaking, that … Continue reading SQL Server Trick: Circumvent Missing ORDER BY Clause
The Index You’ve Added is Useless. Why?
Recently, at the office: Bob: I've looked into that slow query you've told me about yesterday, Alice. I've added the indexes you wanted. Everything should be fine now Alice: Thanks Bob. I'll quickly check ... Nope Bob, still slow, it didn't seem to work Bob: You're right Alice! It looks like Oracle isn't picking up … Continue reading The Index You’ve Added is Useless. Why?
Java 8 Friday: Language Design is Subtle
At Data Geekery, we love Java. And as we're really into jOOQ's fluent API and query DSL, we're absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every Friday, we're showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and … Continue reading Java 8 Friday: Language Design is Subtle
How to Implement Sort Indirection in SQL
I've recently stumbled upon this interesting Stack Overflow question, where the user essentially wanted to ensure that resulting records are delivered in a well-defined order. They wrote SELECT name FROM product WHERE name IN ('CE367FAACDHCANPH-151556', 'CE367FAACEX9ANPH-153877', 'NI564FAACJSFANPH-162605', 'GE526OTACCD3ANPH-149839') They got CE367FAACDHCANPH-151556 CE367FAACEX9ANPH-153877 GE526OTACCD3ANPH-149839 NI564FAACJSFANPH-162605 They wanted CE367FAACDHCANPH-151556 CE367FAACEX9ANPH-153877 NI564FAACJSFANPH-162605 GE526OTACCD3ANPH-149839 Very often, according to your … Continue reading How to Implement Sort Indirection in SQL
Three-State Booleans in Java
Every now and then, I miss SQL's three-valued BOOLEAN semantics in Java. In SQL, we have: TRUE FALSE UNKNOWN (also known as NULL) Every now and then, I find myself in a situation where I wish I could also express this UNKNOWN or UNINITIALISED semantics in Java, when plain true and false aren't enough. Implementing … Continue reading Three-State Booleans in Java
Java 8 Friday: Let’s Deprecate Those Legacy Libs
At Data Geekery, we love Java. And as we're really into jOOQ's fluent API and query DSL, we're absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every Friday, we're showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and … Continue reading Java 8 Friday: Let’s Deprecate Those Legacy Libs
jOOQ Newsletter: April 30, 2014
Subscribe to this newsletter here Tweet of the Day Our customers, users, and followers are sharing their love for jOOQ to the world. Here are: Santiago M. Mola who appreciates jOOQ's affinity to SQL features and its correctness https://twitter.com/mola_io/status/456800912917270528 Vlad Mihalcea who's reading the jOOQ docs to learn about SQL https://twitter.com/vlad_mihalcea/status/457055965171687424 Thanks for the shouts, guys! It … Continue reading jOOQ Newsletter: April 30, 2014
NoSQL? No, SQL! – How to Calculate Running Totals
If anything at all, our jOOQ talks at various JUGs and conferences have revealed mostly one thing: Java developers don't know SQL. And it isn't even necessarily our fault. We're just not exposed to SQL nowadays. But consider this: We developers (or our customers) are paying millions of dollars every year to Oracle, Microsoft, IBM, … Continue reading NoSQL? No, SQL! – How to Calculate Running Totals