Utlirp.sql

Question

Hello,
When we run utlirp.sql it makes valid objects to invalid objects and it compiles them.But in what case do we need to make the valid objects invalid.Why dont we just compile the invalid objects directly it reduces the work rite?
Kindly tell me whats the reason and when will we go for it.
Thanks,
928714.

Answer 1

You could answer your own questions if you just took the time to read the comments at the beginning of the script.
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When we run utlirp.sql it makes valid objects to invalid objects and it compiles them.
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INCORRECT! Where did you get the idea that the script recompiles the objects?
Those comments will tell you that the script DOES NOT recompile all of the objects (only the DDL triggers).
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But in what case do we need to make the valid objects invalid.
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The comments will also tell you that the script MUST BE RUN when you need to regenerate the compiled code (e.g. when migrating a 32 bit database to 64 bit or vice versa.
The script would be used when upgrading the database and MUST BE run in UPGRADE mode.
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Why dont we just compile the invalid objects directly it reduces the work rite?
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That question is related to the utlrp.sql script which is the script that COMPILES the invalid objects.
You can, and should compile the invalid objects directly UNLESS you have system objects that are invalid and need to rebuild them. If you run the utlrp.sql script to do the compile there cannot be any other DDL going on in the database; that script is normally run when users are not allowed on the system.
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Kindly tell me whats the reason and when will we go for it.
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I believe I just did.