Month: July 2016

Working with IDENTITY columns in HP Vertica

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HP Vertica has 2 different types of columns that incremented automatically by the database. They are AUTO_INCREMENT and IDENTITY. The key difference is in the level of control the user has. The AUTO_INCREMENT column always starts with 1 and increments by 1. Those values are hardcoded and can not be changed. IDENTITY provides more control. Read More …

Using Database Designer to Build Projections with Optimal Sort Order in HP Vertica

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The performance level of your queries in Vertica depend on the design of your projections. In the projection definitions you specify how your data will be segmented and how your data will be sorted. If you are going to make the right choices your queries will perform really well. I covered projection segmentation in my Read More …