PQprepare question

According to the docs parameters are referenced as $1, $2, and so. Is
there a reason not to use "?" as placeholder? It seems to be quite
common to use "?" and of course a simple counting gives the same
information.

ECPG used to accept "?" notation. Now I started to switch from PQexec to
PQexecParams and at the same time add PQprepare. However, I'd like to
still be able to accept old sources using "?". The question now is, do I
replace the "?"s on the clien side in ecpglib or libpq, or is it
possible to add this in the backend for more general use?

Michael
--
Michael Meskes
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