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ORA-02303: Cannot drop or replace a type with type or table dependents

What it means

An object type is used by tables or other types.

How to fix it

Use ALTER TYPE ... CASCADE or CREATE OR REPLACE TYPE ... FORCE (only if no table data depends on it).

Catch it before it runs

ORA Error Helper
Explains ORA-/PLS- codes inside JetBrains IDEs and DataGrip.
PL/SQL Lint
Flags risky PL/SQL patterns while you type.
Oracle Plan Reader
Reads execution plans and points at the slow step.
PL/SQL in Practice
Kindle book with practical PL/SQL for working developers.

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Updated 2026-11-12.