16f6c0aecf
Inline adoc files when they are included exactly once. Also fix language tags because this inlining gives us better information on what language the code is written in.
91 lines
1.5 KiB
Plaintext
91 lines
1.5 KiB
Plaintext
== Why is this an issue?
|
|
|
|
Having functions and procedures which take too many parameters decreases the code's readability and usability. It is likely that such a function/procedure is not modular enough, and should be split into several smaller ones.
|
|
|
|
=== Noncompliant code example
|
|
|
|
With the default threshold of 10:
|
|
|
|
[source,sql]
|
|
----
|
|
SET SERVEROUTPUT ON
|
|
|
|
CREATE FUNCTION sumWithTooManyParameters( -- Noncompliant, too many parameters
|
|
a1 PLS_INTEGER,
|
|
a2 PLS_INTEGER,
|
|
a3 PLS_INTEGER,
|
|
a4 PLS_INTEGER,
|
|
a5 PLS_INTEGER,
|
|
a6 PLS_INTEGER,
|
|
a7 PLS_INTEGER,
|
|
a8 PLS_INTEGER,
|
|
a9 PLS_INTEGER,
|
|
a10 PLS_INTEGER,
|
|
a11 PLS_INTEGER
|
|
)
|
|
RETURN PLS_INTEGER AS
|
|
BEGIN
|
|
RETURN a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 + a9 + a10 + a11;
|
|
END;
|
|
/
|
|
|
|
BEGIN
|
|
DBMS_OUTPUT.PUT_LINE('Sum is ' || sumWithTooManyParameters(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11));
|
|
END;
|
|
/
|
|
|
|
DROP FUNCTION sumWithTooManyParameters;
|
|
----
|
|
|
|
=== Compliant solution
|
|
|
|
[source,sql]
|
|
----
|
|
SET SERVEROUTPUT ON
|
|
|
|
CREATE FUNCTION sumCorrected(n PLS_INTEGER) RETURN PLS_INTEGER AS -- Compliant
|
|
BEGIN
|
|
RETURN (1 + n)*(n / 2);
|
|
END;
|
|
/
|
|
|
|
BEGIN
|
|
DBMS_OUTPUT.PUT_LINE('Sum is ' || sumCorrected(11));
|
|
END;
|
|
/
|
|
|
|
DROP FUNCTION sumCorrected;
|
|
----
|
|
|
|
[source,sql]
|
|
----
|
|
----
|
|
|
|
ifdef::env-github,rspecator-view[]
|
|
|
|
'''
|
|
== Implementation Specification
|
|
(visible only on this page)
|
|
|
|
include::../message.adoc[]
|
|
|
|
=== Parameters
|
|
|
|
.parameters
|
|
****
|
|
|
|
----
|
|
10
|
|
----
|
|
|
|
The maximum number of function and procedure parameters allowed.
|
|
****
|
|
|
|
|
|
'''
|
|
== Comments And Links
|
|
(visible only on this page)
|
|
|
|
include::../comments-and-links.adoc[]
|
|
endif::env-github,rspecator-view[]
|