rspec/rules/S2527/tsql/rule.adoc
Fred Tingaud 51369b610e
Make sure that includes are always surrounded by empty lines (#2270)
When an include is not surrounded by empty lines, its content is inlined
on the same line as the adjacent content. That can lead to broken tags
and other display issues.
This PR fixes all such includes and introduces a validation step that
forbids introducing the same problem again.
2023-06-22 10:38:01 +02:00

41 lines
875 B
Plaintext

== Why is this an issue?
In a Zen-like manner, "NULL" is never equal to anything, even itself. Therefore comparisons using equality operators will always return ``++False++``, even when the value actually ``++IS NULL++``.
For that reason, comparison operators should never be used to make comparisons with ``++NULL++``; ``++IS NULL++`` and ``++IS NOT NULL++`` should be used instead.
=== Noncompliant code example
[source,sql]
----
UPDATE books
SET title = 'unknown'
WHERE title = NULL -- Noncompliant
----
=== Compliant solution
[source,sql]
----
UPDATE books
SET title = 'unknown'
WHERE title IS NULL
----
ifdef::env-github,rspecator-view[]
'''
== Implementation Specification
(visible only on this page)
include::../message.adoc[]
'''
== Comments And Links
(visible only on this page)
include::../comments-and-links.adoc[]
endif::env-github,rspecator-view[]