== Why is this an issue?

Calling the ``+``, ``++-++`` or ``++NOT++`` prefix operator twice does nothing: the second invocation undoes the first. Such mistakes are typically caused by accidentally double-tapping the key in question without noticing.


Either this is a bug, if the operator was actually meant to be called once, or misleading if done on purpose.

=== Noncompliant code example

[source,sql]
----
IF NOT ( NOT foo = 5 ) THEN  -- Noncompliant
  value := ++1;              -- Noncompliant
END IF;
----

=== Compliant solution

[source,sql]
----
IF foo = 5 THEN  -- Compliant
  value := +1;       -- Compliant
END IF;
----

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

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

include::../message.adoc[]

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

=== on 1 Feb 2019, 22:47:11 Alexandre Gigleux wrote:
https://www.periscopedata.com/blog/sql-symbol-cheatsheet

include::../comments-and-links.adoc[]

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