Build 64bit OCILIB Libraries for CodeBlocks

I tend to compile with gcc, in a bash session, on Windows 7. I use Code::Blocks as my IDE of choice and one of my projects, well, quite a few, use the excellent OCILIB library for accessing Oracle databases, by Vincent Rogier. I can’t recommend this library highly enough.

However, it comes with a Code::Blocks project file to build 32 bit libraries, but I need 64 bits. Here’s how I do it.

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Generate Entity Relationship Diagrams from a SQL Script.

Sometimes, just occasionally, you find yourself as a DBA on a site where, for some strange and unknown reason, you don’t have an Entity Relationship Diagram (ERD) for the database that you are working on. You could use a tool such as Toad, or SQL*Plus (or even, SQL Developer – if you must) to generate a list of referential integrity constraints. There has to be a better way. Continue reading Generate Entity Relationship Diagrams from a SQL Script.

Snorkelling in the Oracle Listener Logs.

(Snorkelling is not quite as in depth as a “deep dive”!)

Attempting to parse a listener.log will probably bend your brain, but I needed to do it recently to determine which unique servers and/or desktops and/or application servers were still connecting to a database prior to that database going down for maintenance. This was an exercise in confirming that the documentation we have, is correct.

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Dropping Temporary Tables (With Bonus, Broken Check Constraints!)

I found a broken check constraint, one that simply wouldn’t work, on a database. It was created as:

... CHECK(COLUMN_NAME IN ('Y','N',NULL)) ;

Try it yourself, it doesn’t work! Anyway, I needed to find if there were any other check constraints broken in this manner, so I did the following:

Continue reading Dropping Temporary Tables (With Bonus, Broken Check Constraints!)