[postgis-users] Is that possible a function to behave differently inside and outside another main function code?

[rodrigosperb]

Not really... It is very unlikely that this situation would happen...

The functions are defined are monotonous and always grow (though eventual
steps my occur, this shouldn't be really a problem...)

Rodrigo Sperb


Kevin Neufeld wrote:
> 
> 
> rodrigosperb wrote:
> ...
>> Well, I'm quite sure that the input have at least 2 points. Because they
>> are
>> "bigger" functions (implemented as LINESTRING) that I cut a part (and my
>> RAISE NOTICEs during the code seem to indicate that this cutting performs
>> correctly), so they will have at least 2-points, start and end of the X
>> interval in which I cut the function to give as input.
>> 
> 
> Ah OK.  Is it possible your cutting would yield a vertical 2-point line? 
> Cuz such a line would have only 1 distinct X 
> value, right?  That's what I meant by erroneous input data.  If I
> understand correctly, based on your query logic, a 
> vertical line input into your function would result in a single POINT
> geometry which you try to turn into a LINESTRING.
> 
> -- Kevin
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