How to modify a tuple returned by SPI_copytuple?

[Mario Weilguni <mweilguni@xxxxxxxx>]

I checked the documentation, and still do not get it. I can use SPI_copytuple 
to return a modified version of a tuple, but how do I modify a structure of 
type HeapTuple.

In my case, I just want to modify a INT32 column for sorting.

Any ideas?

Regards,
	Mario Weilguni


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