rspec/rules/S3923/tsql/rule.adoc

== Why is this an issue?

Having all branches in a ``++CASE++``, ``++IF++`` or ``++IIF++`` chain with the same implementation is an error. Either a copy-paste error was made and something different should be executed, or there shouldn't be a ``++CASE++``/``++IF++``/``++IIF++`` chain at all.

=== Noncompliant code example

[source,sql]
----
IF @x < 25 -- Noncompliant
  PRINT 'A'
ELSE IF @x < 10
  PRINT 'A'
ELSE
  PRINT 'A'

SELECT
  CASE col1 -- Noncompliant
    WHEN 1 THEN 'A'
    WHEN 2 THEN 'A'
    ELSE        'A'
  END,
  IIF(col1 < 25, 'A', 'A') -- Noncompliant
 FROM table1
----

=== Exceptions

This rule does not apply to ``++IF++``/``++CASE++`` chains without ``++ELSE++`` clauses.


[source,sql]
----
IF @x < 25 -- no issue, this could have been done on purpose to make the code more readable
  PRINT 'A'
ELSE IF @x > 10
  PRINT 'A'
----

ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

include::../message.adoc[]

include::../highlighting.adoc[]

'''
== Comments And Links
(visible only on this page)

include::../comments-and-links.adoc[]
endif::env-github,rspecator-view[]