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differnt behaviour of NULL in an aggregate and with an operator - Mailing list pgsql-general

From Willy-Bas Loos
Subject differnt behaviour of NULL in an aggregate and with an operator
Date
Msg-id 1dd6057e0808120129s6b1d33cdo952ce05d2eb91780@mail.gmail.com
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Responses Re: differnt behaviour of NULL in an aggregate and with an operator
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Hi,

Why is it that
  SELECT 1+null
evaluates to NULL, but
  SELECT sum(foo) FROM (VALUES(1), (NULL)) AS v(foo)
evaluates to 1 ?

WBL

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