dasini.net – Diary of a MySQL expert

Efficiently loading CSV data into your MySQL environment is a crucial step for many analytical workloads, especially when dealing with the substantial datasets common in today’s data-driven world. Both MySQL Shell’s parallel import utility and HeatWave’s Auto Parallel Load feature offer robust and effective solutions, each catering to slightly different needs and environments.

MySQL Shell’s util.importTable provides a flexible and powerful way to import data from various sources, including local disks and OCI Object Storage, into your standard MySQL tables. It’s a developer-friendly tool that offers granular control over the import process.

For those leveraging the analytical power of MySQL HeatWave, the sys.heatwave_load stored procedure, particularly with its Auto Parallel Load capabilities, simplifies the often complex task of getting data into the in-memory columnar store.

In this article I will show you how to properly configure Apache Superset in order to take advantage of a high performance, in-memory query accelerator: MySQL HeatWave.

In MySQL 8.0.16 the optimizer has improved again!
Comparisons of columns of numeric types with constant values are checked and folded or removed for invalid or out-of-rage values.
The goal is to speed up query execution.

Since MySQL 5.7 one can put indexes on expressions, aka functional indexes, using generated columns. Basically you first need to use the generated column to define the functional expression, then indexed this column.

Quite useful when dealing with JSON functions, you can find an example here and the documentation there.

Starting with MySQL 8.0.13 we have now an easiest way to create functional indexes (or functional key parts as mentioned in the documentation) \o/

Let’s see how with a quick practical example.

MySQL Tech Day @Paris

We’re happy to announce you that MySQL Tech Day will take place in Paris on Oct 10, 2013 in Oracle main office. It’ll be a full day event giving you an occasion to listen directly from Oracle developers about most of the improvements made recently within MySQL 5.6 and 5.7 development.