Select statement error !!!!

Hello,

I am doing a simple program with PostgreSql wherein i am giving a select
statement as an argument to PQexec like this

char query[1024];
strcpy(query,"Select * from Udp_Table");

res = PQexec(conn,query);

if(!res || PQresultStatus(res)! = PGRES_COMMAND_OK)
{
fprintf(stderr,"Select Failed.\n");
PQclear(res);
exit(1);
}
now if i try to execute the above statement it is giving me always teh
select failed message. I dont know where the problem is? But when i try to
store some other query in array like update statement or insert statement or
any other statement it is working and giving the results i want to see. But
i dont know what is wrong with the select statement i think it should work
isn't it? Can anybody out there please help me to solve this problem.

Thank You,

Goutham.V
MSIT.

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