Invalidating package

To get a callback after a computation has been recomputed, you can call This property is a convenience to support the common pattern where a computation has logic specific to the first run.

A Dependency represents an atomic unit of reactive data that a computation might depend on.

Each time a computation runs, it may access various reactive data sources that serve as inputs to the computation, which are called its dependencies.

Callbacks registered with True if we are computing a computation now, either first time or recompute.

When DB admin drops then create a table, some packages became invalid. But how to know exactly what is the table(dependant object) that is the cause that a package to became invalid?

select * from user_errors where name = 'P1'; NAME TYPE SEQUENCE LINE POSITION TEXT ATTRIBUTE MESSAGE_NUMBER ---- --------- ---------- ---------- ---------- ----------------------------------------------- --------- -------------- P1 PROCEDURE 1 4 33 PL/SQL: ORA-00942: table or view does not exist ERROR 0 P1 PROCEDURE 2 4 3 PL/SQL: SQL Statement ignored ERROR 0 Did you try to use the dba_dependencies view to identify the related objects: SELECT * FROM dba_dependencies where name='package name'; That will give a you a list of objects which your package has references to.

A flush will occur automatically as soon as the system is idle if there are invalidated computations.

You can also use , then when the outer call stops or reruns, the inner call will stop automatically.

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