function given current output-row

Is there a function that returns the number of the current outputline
?

ie.: select value,function from table;
value  |  function
-------+-----------
val1   |  1
val2   |  2
val3   |  3
...


I need this for a complex weighted sortingalgorithm.

thnx,
peter

--
mag. peter pilsl

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fax  : +43 676 3546512
email: pilsl@goldfisch.at
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