>
>TODO updated:
>
> * %Make row-wise comparisons work per SQL spec
>
> Right now, '(a, b) < (1, 2)' is processed as 'a < 1 and b < 2', but
> the SQL standard requires it to be processed as a column-by-column
> comparison, so the proper comparison is '(a < 1) OR (a = 1 AND b < 2)'
>
>
Can we save current behave (with small modification) with other operator,
like <*
(1,1) <* (1,2) = true
(1,2) <* (2,1) is NULL
(2,3) <* (1,2) = false
it's usefull for multicriterial optimalisation
Regards
Pavel Stehule
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