Category: Blog posts

Scripts to populate the date dimension in a PostgreSQL data warehouse

Anybody who’s worked on a data warehouse knows the date dimension is key. Designing it is complex and filling it might be tricky and time consuming. In this article I simply share SQL scripts I came up with to fill the date dimension in a PostgreSQL data warehouse.  Continue reading Scripts to populate the date dimension in a PostgreSQL data warehouse

Bass Transcription of Magdalene – Lenny Kravitz

Magdalene is my all-time favourite song from Kravitz. It was released in 1995 on the album Circus. When I started playing bass, I could not find the transcription anywhere. A few years later, it became one of the first songs I transcribed.

Lenny Kravitz in 1995. Simon Ritter/Redferns/Getty.

Continue reading Bass Transcription of Magdalene – Lenny Kravitz

Dealing with non-primitive types with Talend tPostgresqlOuput component

Batch entry 0 INSERT INTO "public"."log" ("source","logged") VALUES ('123.45.56.78','2017-06-21 13:52:23') was aborted. Call getNextException to see the cause.

Ever bump into this kind of exception? This issue drove me crazy, and it took me a good few hours to figure out how to deal with it. The solution is actually very simple… once you know it!

Continue reading Dealing with non-primitive types with Talend tPostgresqlOuput component

Using Talend tRowGenerator to populate tables with foreign key constraints

Many tutorials show how to use the tGeneratorRow component, but most of them (if not all of them) consider ad-hoc examples. Therefore, they’re often hard to apply in real-world situations. In this post I’m going to explain how to populate a table referencing another table.

Continue reading Using Talend tRowGenerator to populate tables with foreign key constraints