When using Oracle, the data dictionary provides us with tons of tables and views, allowing us to fetch information about pretty much anything within the database. We do have information like that in MySQL 5.0 (and up) in the
information_schema database, but it’s scattered through several different tables.
Sometimes a client asks us to change the datatype of a column, but forgets to mention the schema name, and sometimes even the table name. As you can imagine, having this kind of information is vital to locate the object and perform the requested action. This kind of behaviour must be related to Murphy’s Law.
In any case, I’d like to share with you a simple stored procedure that has helped us a lot in the past.
CREATE DATABASE IF NOT EXISTS dba; USE dba;[Read more...]