[sc34wg3] TMQL: function-invocation and parameters

[Lars Heuer]

[...]
> does not reference "tuple-expression". If my suspicion is not correct
> and the reference to "tuple-expression" is not a cheap trick ;) I like
> to know why a tuple expression is needed.

... and if it is known that tuple-expression is also defined as

    tuple-expression ::= 'null'

which means that the following is a valid function invocation (without
'(' and ')'):

      function null

which is according to the grammar equivalent to:

      function()

      
Best regards,
Lars
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