8000 docs: improve CREATE FUNCTION docs about language case and quoting · postgres/postgres@de4b655 · GitHub
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docs: improve CREATE FUNCTION docs about language case and quoting
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‎doc/src/sgml/ref/create_function.sgml

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@@ -252,10 +252,10 @@ CREATE [ OR REPLACE ] FUNCTION
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<listitem>
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<para>
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The name of the language that the function is implemented in.
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Can be <literal>SQL</literal>, <literal>C</literal>,
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It can be <literal>sql</literal>, <literal>c</literal>,
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<literal>internal</literal>, or the name of a user-defined
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procedural language. For backward compatibility,
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the name can be enclosed by single quotes.
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procedural language, e.g. <literal>plpgsql</literal>. Enclosing the
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name in single quotes is deprecated and requires matching case.
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</para>
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</listitem>
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</varlistentry>

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