How to check if column_ name is used by any procedure ,package ,function

Hello
Help Is greatly appreciated .
Kindly please let me know for the folllwoing:
How to check if column_ name is used by any procedure ,package ,function ,trigger or in any dataabse objects

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How to check if column_ name is used by any procedure ,package ,function ,trigger or in any dataabse objects
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In general you can't. Code can always exist outside the database and it is always possible that you have dynamic code and there is no way to find references like that if used by dynamic code. That dynamic code reference could be based on a query stored in a table.
And there is no way of knowing if external code (e.g. a Java app) references that column.
Another issue is that a column could exist in multiple schemas and in multiple objects of different types in those schemas. So a global DB search for 'MY_COLUMN' might turn up references in multiple schemas and you may only care about one schema.
Unfortunately a reference to 'MY_COLUMN' in code could refer to many different objects or to an object in different schemas so how would you resolve those? Especially if you take synonyms into account which can ponit about anywhere.
Why don't you tell us what it is you are really trying to do?
Are you trying to find the references to a particular column? Why? Are you planning on removing/renaming the column? If so then the simplest way is to remove/rename the column and see what objects become invalid. Those invalid objects will have become invalid because that column is no longer available.
As suggested you can use DBA_SOURCE for references in code that use the standard names. But for tables/views you need to use all_tab_columns. And for dynamic code or client code (e.g. a Java application) there is no way.

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