Обсуждение: TOO MANY CONNECTIONS (53300)

Hey all,

I have three questions about libpq.
Is there a way to get TOO MANY CONNECTIONS error code from libpq
immediately after calling PQconnect* () ? Or how to determine such error
not parsing PQerrorMessage() ?
It seams, that all of the error codes may be obtained by calling PQresultErrorField() ?
But this function works only with results. So in what situations
TOO MANY CONNECTIONS error may be thrown after successfully connection ? :)
In case of dblink?
The same situation with SQLSERVER REJECTED ESTABLISHMENT OF SQLCONNECTION
what does this error means?

Regards,
Dmitriy