I have to study and modify a big and poorly documented codebase written in pl/sql. I use Oracle SQL Developer to navigate through it, but it become tedious because there is not a "go to declaration" nor "find usages" option so I have to go manually to the referred package to find the function or procedure I want to understand, or grep an offline copy to find the usages.
I have tried to setup vim+ctags, but exuberant ctags gets confused by case insensitiviness.
So the question is, which tools allow to easily navigate through PL/SQL code?