In 95% of the cases, cartesian products originate from accidental cross join operations and cause unnecessary high load on a database. Maybe the results aren't even wrong, as someone may have applied a UNION or a DISTINCT keyword, to remove unwanted duplicates. But there are those 5% of SQL queries, where the cartesian product is … Continue reading CROSS JOIN, a nice example for a rarely used operation
Tag: example
jOOQ in the wild
The first open source projects start to appear on the web with public dependencies on jOOQ. One of them is a small backup tool called blizzys-backup by Maik Schreiber. It uses jOOQ to handle a small H2 database with 3-4 relations describing scheduled backups and backup-file meta data. Interestingly, Maik seems to prefer lazy fetching … Continue reading jOOQ in the wild