Cause: The PL/SQL compiler could not find package STANDARD in the
current Oracle database. To compile a program, PL/SQL needs package
STANDARD.
Action: Make sure that package STANDARD is available in the current Oracle
database, then retry the operation.
----------------------------
A package named STANDARD defines the PL/SQL environment. The package spec
globally declares types, exceptions, and subprograms, which are available
automatically to PL/SQL programs.