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postgresql c++

From: <ing_enriquebarrios(at)argentina(dot)com>
To: pgsql-es-ayuda(at)postgresql(dot)org
Cc: pedromateoa(at)gmail(dot)com
Subject: postgresql c++
Date: 2006-11-30 15:01:37
Message-ID: 20061130150634.B4D356445F1@ns-2.net (view raw or flat)
Thread:
Lists: pgsql-es-ayuda
<html>

<P>con este script te podes conectar, esto es básico, vos le agregas el nivel de complejidad que necesitas.</P>
<P>saludos</P>
<P><BR>
#include &lt;stdio.h&gt;<BR>
#include &lt;libpq-fe.h&gt;<BR>
#include &lt;iostream&gt;<BR>
#include &lt;fstream&gt;</P>
<P>static void<BR>
salir(PGconn *psql)<BR>
{<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PQfinish(psql);<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; exit(1);<BR>
}</P>
<P>int<BR>
main()<BR>
{</P>
<P>PGconn *psql;<BR>
PGresult *result;</P>
<P>int&nbsp; nFields;<BR>
int&nbsp; i,j;</P>
<P><BR>
psql = PQconnectdb("hostaddr = '10.20.182.13' port = '5432' dbname = 'apl_calden2' user = 'postgres' password = 'manager' conn<BR>
ect_timeout = '10'");<BR>
</P>
<P>if (PQstatus(psql) != CONNECTION_OK)<BR>
{<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; fprintf(stderr, "libpq error: PQstatus(psql) != CONNECTION_OK\n\n");<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; salir(psql);<BR>
}</P>
<P>result = PQexec(psql,"select * from empresa;");</P>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; nFields = PQnfields(result);</P>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (nFields != 0){<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for (i = 0; i &lt; nFields; i++)<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; printf("%-15s", PQfname(result, i));<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; printf("\n\n");</P>
<P><BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for (i = 0; i &lt; PQntuples(result); i++)<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for (j = 0; j &lt; nFields; j++)<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; printf("%-15s", PQgetvalue(result, i, j));<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; printf("\n");<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</P>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PQclear(result);<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</P>
<P>salir(psql);</P>
<P><BR>
}</P>
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