sql - Oracle user_constraints view not showing all constraints -

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i need info oracle metadata objects (such constraints, indices , on). when browsing database pl/sql developer, able view and/or edit objects of such kind. objective data programmatically desktop application.
and here, issue comes:
when executing query user_constraints of constraints, not of them (i still can see them in pl/sql developer though). , same situation occurs when try data all_constraints (i don't have access dba_constraints).
can help?

p.s. problem solved
tried filtering user_constraints view constraints' names (and strangely didn't find them), able see them once filtered names of tables own them.
anyway, help!


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