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G-2340: Always define your VARCHAR2 variables using CHAR SEMANTIC (if not defined anchored).

Blocker

Reliability

Reason

Changes to the nls_length_semantic will only be picked up by your code after a recompilation.

In a multibyte environment a varchar2(10) definition may not necessarily hold 10 characters when multibyte characters are part of the value that should be stored, unless the definition was done using the char semantic.

Example (bad)

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create or replace package types_up is
   subtype description_type is varchar2(200);
end types_up;
/

Example (good)

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create or replace package types_up is
   subtype description_type is varchar2(200 char);
end types_up;
/