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Message Posted: Mon, 03 Jun 2002 @ 14:02:08 GMT

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Can anyone explain why in certain circumstances the Teradata parser requires parens around a function call? I have a suspicion that there's an implicit conversion taking place but I don't see why.

For example:

select coalesce(null, '123')
returns '123'

select coalesce(null, '123') || 'foo'
fails 3706 syntax error

select (coalesce(null, '123')) || 'foo'
returns '123foo'

Ah, the parens make all the difference.

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