In MySQL and Oracle, you set a session variable quite differently. That means you should expect there differences between setting a session variable in Postgres. This blog post lets you see how to set them in all three databases. I’m always curious what people think but I’m willing to bet that MySQL is the simplest approach. Postgres is a bit more complex because you must use a function call, but Oracle is the most complex.
The difference between MySQL and Postgres is an “@”
symbol versus a current_setting() function call.
Oracle is more complex because it involves the mechanics in
Oracle’s sqlplus shell, SQL dialect, and PL/SQL
language (required to assign a value to a variable).
MySQL
MySQL lets you declare a session variable in one step and use it one way in a SQL statement or stored procedure.
- You set a session variable on a single line with the following …