Oracle Database Express Edition (XE)

     Hi All,

All of sudden we have many db objects become invalid and our DBA have to recompile them to avoid consequences.

Can we know what are all conditions can cause the DB objects invalid.

We were not applying or applied any patch  or we have not modified any code.

There is no configuration updates and there is no data fixes running at the time of issue occurrence.

We are trying to identify  what caused the DB objects Invalid.

Any guidance or help is much appreciated.

Thanks,

Asaraf.