Thursday, February 28, 2013

The LedgerSMB Service Locator for UDF's: How it Works

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One of the questions I got from a post last week was how the LedgerSMB service locator works.  In the past I have covered the database desi...
Monday, February 18, 2013

A look back on something I wrote 9 years ago

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I recently came across a comment I wrote in 2004 on Slashdot.  I read it and was surprised actually both where my approach had changed and w...
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Friday, February 15, 2013

Building SOLID Databases: Dependency Inversion and Robust DB Interfaces

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Dependency inversion is the idea that interfaces should depend on abstractions not on specifics.  According to Wikipedia, the principle stat...
Tuesday, February 12, 2013

Building SOLID Databases: Interface Segregation, or Keep Stored Procedures Simple

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As far as interfaces go, we are talking specifically about functional interfaces (UDF's, or "User Defined Functions", and stor...
Friday, February 8, 2013

Building SOLID Databases: Liskov Substitution Weirdness

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If the Open/Closed principle starts looking a little strange as applied to object-relational design, the Liskov Substitution Principle appli...
Wednesday, January 30, 2013

Building SOLID Databases: Open/Closed Principle

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Introduction Like the Single Responsibility Principle, the Open/Closed Principle is pretty easy to apply to object-relational design in P...
Wednesday, January 23, 2013

Building SOLID Databases: Single Responsibility and Normalization

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Introduction This instalment will cover the single responsibility principle in object-relational design, and its relationship both to dat...
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