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.
38 lines
1.2 KiB
Plaintext
38 lines
1.2 KiB
Plaintext
== Why is this an issue?
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``++CAST(... AS CHAR/VARCHAR)++`` can be a source of incompatibilities between database versions: the behavior of ``++CAST++`` may not be the same depending on the version of the database system. Such incompatibilities can cause unexpected output from applications that ``++CAST++`` decimal data to ``++CHAR++`` or ``++VARCHAR++``, it's therefore best to avoid using ``++CAST(... AS CHAR/VARCHAR)++``.
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=== Noncompliant code example
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[source,cobol]
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----
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DELETE product
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WHERE CAST(status_code AS CHAR(2)) = '42' -- Noncompliant
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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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=== Message
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Avoid using 'CAST(... AS CHAR/VARCHAR)'
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'''
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== Comments And Links
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(visible only on this page)
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=== on 25 Oct 2016, 11:36:16 Nicolas Bontoux wrote:
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+References+:
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* http://www.ibm.com/support/knowledgecenter/SSEPEK_11.0.0/sqlref/src/tpc/db2z_castspecification.html[CAST specification]
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* http://www.ibm.com/support/knowledgecenter/SSEPEK_10.0.0/apsg/src/tpc/db2z_relincompatapplsqlfromv9.html[IBM note on SQL release incompatibilities] (see section _Changes to string formatting of decimal data_)
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endif::env-github,rspecator-view[]
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