On 6/24/17 06:31, Dmitry Igrishin wrote:
> PQgetvalue returns a value of type char* (without const). But the
> documentation says:
> "The pointer returned by PQgetvalue points to storage that is part of
> the PGresult structure. /One should not modify the data it points to/"
> (my italics). Could someone tell me please, what wrong with modifing
> arbitrary character of the data pointed by PQgetvalue's returning value?
> Or why this restriction is documented? Thanks.

This is just how the API is defined.  It could be defined differently,
but it is not.

Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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