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Message Posted: Mon, 03 Jun 2002 @ 18:55:56 GMT

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Actually, this behavior IS documented for the special-case COALESCE and NULLIF forms; it's NOT documented for general CASE expressions, but the same rule does in fact apply.

For example, from SQL Reference Volume 5:

Modifying COALESCE With A Scalar Expression
Whenever you modify a COALESCE function with a scalar expression, you must enclose the entire function and its operands with parentheses.

Note that this applies to ALL scalar functions, not just concatenation; that includes arithmetic functions, CAST, SUBSTRING, ...

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