How do I do this in SQLPLUS

A new index is created on an existing table i.e
CREATE INDEX MENUINDX##EXECMODE ON MENUINDX(U##EXECMODE, PROGRESS_RECID);
I need a mechanism to query back preferably all new indexes created or all indexes on Tables owned by user A. And then issue a command similar to
update menuindex
set U##EXECMODE=upper EXECMODE;

So that all U## fields have a value which is the uppercase equivalant to fields with similar name i.e Execmode = will hold lowercase value and U##Execmode will hold uppercase value.

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Have you tried:

update menuindex
set U##EXECMODE=upper(EXECMODE);

???
:rolleyes:

I think you have to recreate the indexes of the user. The best way is to export in user mode and import with indexfile= to extract index creation scripts, modify these as per your requirement and replace the old indexes.