rspec/rules/S3921/plsql/rule.adoc

== Why is this an issue?

Trying to assign a large character value to a smaller variable or column will raise an error.

=== Noncompliant code example

[source,sql]
----
create table persons (id number, name varchar2(4));

insert into persons (id, name) values (1, 'Alice'); -- Noncompliant, raises ORA-12899

create or replace procedure sp1
is 
  foo varchar2(2);
begin
  select name into foo from persons where id = 1; -- Noncompliant, may raise ORA-06502
end;
----

=== Compliant solution

[source,sql]
----
create table persons (id number, name varchar2(8));

insert into persons (id, name) values (1, 'Alice');

create or replace procedure sp1
is 
  foo varchar2(8);
begin
  select name into foo from persons where id = 1;
end;
----

== Resources

* CWE - https://cwe.mitre.org/data/definitions/704[CWE-704 - Incorrect Type Conversion or Cast]


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== Implementation Specification
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include::../parameters.adoc[]

include::../highlighting.adoc[]

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== Comments And Links
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include::../comments-and-links.adoc[]

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