Hi, <br /><br />Following code fails at PQExec. I am using PQerrorMessage() function to print error message but no
output.Error code is 2. What could be the problem with select query? I tried with "drop table" it worked.<br /><br
/>[root@hqsrc]# ./1<br />PQExec failed(2):<br /><br />1.c<br />#include <stdio.h><br />#include
<stdlib.h><br/>#include <string.h><br />#include <errno.h><br />#include <sys/time.h><br
/>#include<libpq-fe.h><br /><br />int main()<br />{<br /> char *conninfo;<br /> PGconn
*conn;<br/> PGresult *res;<br /><br /> /* Prepare connection info */<br /> conninfo = (char *)
malloc(64);<br/> if (conninfo == NULL) {<br /> fprintf(stderr, "malloc error: %s\n",
strerror(errno));<br/> return -1;<br /> }<br /><br /> memset(conninfo, 0, 64);<br
/> strncpy(conninfo, "dbname=llist user=yyy password=xxx", 63);<br /><br /> /* Make a connection to the
database*/<br /> conn = PQconnectdb(conninfo);<br /><br /> /* Check to see that the backend connection
wassuccessfully made */<br /> if (PQstatus(conn) != CONNECTION_OK)<br /> {<br />
fprintf(stderr,"Connection to database failed: %s", PQerrorMessage(conn));<br /> return -1;<br />
}<br/><br /> res = PQexec(conn, "select * from lists;");<br /> if (PQresultStatus(res) !=
PGRES_COMMAND_OK)<br/> {<br /> fprintf(stderr, "PQExec failed(%d): %s\n", PQresultStatus(res),
PQerrorMessage(conn));<br/> PQclear(res);<br /> return -1;<br /> }<br /><br
/> PQclear(res);<br /><br /> PQfinish(conn);<br /><br /> return 0;<br />}<br /><br /><p><hr
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