Re: parameter limit

On 4/23/20 7:33 AM, Scott Ribe wrote:

In libpq, PQexecParams has nParams as type int. So on any reasonable platform, that's at least 4 bytes. My question then is: when I see documented limits of 65535 params in various drivers and libraries, that is NOT a restriction of libpq nor of the protocol, but rather an arbitrary limit of the driver/library, correct?

No.

From:

src/interfaces/libpq/fe-exec.c

if (nParams < 0 || nParams > 65535)
        {
                printfPQExpBuffer(&conn->errorMessage,
                                                  libpq_gettext("number of parameters must be between 0 and 65535\n"));
                return 0;
        }

The number of parameter values that follow

David J.