38 lines
846 B
Plaintext
38 lines
846 B
Plaintext
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++``.
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For that reason, comparison operators should never be used to make comparisons with ``++NULL++``; ``++IS NULL++`` and ``++IS NOT NULL++`` should be used instead.
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== Noncompliant Code Example
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[source,sql]
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----
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UPDATE books
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SET title = 'unknown'
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WHERE title = NULL -- Noncompliant
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----
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== Compliant Solution
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[source,sql]
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----
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UPDATE books
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SET title = 'unknown'
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WHERE title IS NULL
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----
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ifdef::env-github,rspecator-view[]
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'''
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== Implementation Specification
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(visible only on this page)
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include::../message.adoc[]
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'''
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== Comments And Links
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(visible only on this page)
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include::../comments-and-links.adoc[]
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endif::env-github,rspecator-view[]
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