Category Archives: database

How to write a program to connect to a PostgreSQL server ? (program may not be perfect )

#include <stdio.h> #include <stdlib.h> #include <postgresql/libpq-fe.h> int main(int argc, char **argv) { const char *conninfo; const char *serverversion; PGconn *conn; const char *paramtext = “server_version”; conninfo = “hostaddr = 127.0.0.1 dbname = test user = earl password = bigshot”; conn = PQconnectdb(conninfo); if ( PQstatus(conn) != CONNECTION_OK ) { printf(“Unable to establish connection: %s”,PQerrorMessage(conn)); return …

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