In my previous post, I showed how you can add a fake hint to tag the origin of a duplicated statement and as a side-effect make it unique. What if you regret and can’t remember where it was. Or you want to review old hinted statements after an upgrade to a newer version of the database/optimizer.
Finding duplicate SQL statements using PL/Scope is easy. If you cannot merge them, how can you differentiate between which source is being run?
Can we use PL/Scope to find dead and potentially dead PL/SQL code? Yes! And it takes less than a second!
PL/Scope records declarations and usages of procedures and functions, so it should be easy to do a quick comparison of what’s declared and what’s actually used.
I’m currently working on a project that involves a system that is basically unknown to me. We also have to make changes (additions) to the system as part of our project. The system is a PL/SQL hard-shell application with all business logic and queries in the Oracle database and has about 1 million lines of code. Being a PL/SQL application, it has the great advantage that the source code is easily available for quick searches through views like all_source. We also know that all queries are in the database.
My requirement was to intercept and change the logic around the update of a specific column in a specific table. This means that I will have to find and examine all statements that inserts into or updates this table.Read More »