Sometimes certain bits of code may only work on a certain database and/or version. While we try to avoid such code as much as possible sometimes it is necessary to add database (version) specific behaviour.
To facilitate this we have the following methods that you can use:
trueif PostgreSQL is being used
trueif MySQL is being used
Gitlab::Database.version: returns the PostgreSQL version number as a string in the format
X.Y.Z. This method does not work for MySQL
This allows you to write code such as:
if Gitlab::Database.postgresql? if Gitlab::Database.version.to_f >= 9.6 run_really_fast_query else run_fast_query end else run_query end