Oracle OCI: Problem in Query with Date field

Question

Client compiled with OCI: 10.2.0.4.0
Server: Oracle9i Enterprise Edition Release 9.2.0.4.0
The problematic query is:
SELECT CODIGO FROM LOG WHERE TEL = :telnumber AND DATE_PROC = '05-JUL-08'Table description:
SQL>describe LOG;
TEL NOT NULL VARCHAR2(15)
CODIGO NOT NULL VARCHAR2(20)
DATE_PROC NOT NULL DATEAs simple as it might look, when executed directly on the server with SQLPlus, it returns a result, but when executed from the app that uses OCI, this query returns OCI_NO_DATA always. In the beginning, the date value was also a placeholder, but I found out that even giving a literal like '05-JUL-08' didn't work. I have tried the following:
<ul>
<li>I've tried the basics: querying the DB from the client does work. It's this one that gives me trouble</li>
<li>The query: SELECT CODIGO FROM LOG WHERE TEL = :telnumber does work</li>
<li>Executing: ALTER SESSION SET NLS_DATE_FORMAT="DD-MM-YYYY"; before the query in both the server and the client. Same result: server returns data, client OCI_NO_DATA</li>
<li>Tried changing DATE_PROC format, combining this with the use of TO_DATE(). Same result.</li>
<li>Searched, searched, searched. No answer</li>
</ul>
I'm a bit desperate to find an answer, would appreciate any help and can provide as many further details as needed. Thanks.
Edited by: user12455729 on Jan 15, 2010 5:59 AM. -Formatting-

Answer 1

Hi,
I've recreated your table and populated with your data.
I've run your select using OCILIB on a 10gR2 (client and server) and the codes runs fine and give expected results.
So the problem must resides in your code.... (i don't think it can be a OCI bug)
Here is the ocilib code :
#include "ocilib.h"
int main(void)
    OCI_Connection *cn;
    OCI_Statement *st;
    OCI_Resultset *rs;
    char msisdn[100] = "11223344";
    char datetime[100] = "";
    if (!OCI_Initialize(err_handler, NULL, OCI_ENV_DEFAULT))
        return EXIT_FAILURE;
    cn = OCI_ConnectionCreate("db", "usr", "pwd", OCI_SESSION_DEFAULT);
    st = OCI_StatementCreate(cn);
    OCI_Prepare(st, "SELECT "
                    "  CODIGO_BANCO "
                    "FROM "
                    "  VTA_LOG "
                    "WHERE "
                    "  TELEFONO = :msisdn AND "
                    "  FECHA_PROCESO = TO_DATE(:datetime, 'YYYYMMDDHH24MISS')");
    OCI_BindString(st, "msisdn", msisdn, sizeof(msisdn)-1);
    OCI_BindString(st, "datetime", datetime, sizeof(datetime)-1);
    strcpy(datetime, "20080705162918");
    OCI_Execute(st); 
    rs = OCI_GetResultset(st);
    OCI_FetchNext(rs);
    printf("%s\n", OCI_GetString(rs, 1));
    strcpy(datetime, "20080705062918");
    OCI_Execute(st); 
    rs = OCI_GetResultset(st);
    OCI_FetchNext(rs);
    printf("%s\n", OCI_GetString(rs, 1));
    OCI_Cleanup();
    return EXIT_SUCCESS;
}Output is :
BancoOne
BancoTwoi recreated your data with
create table VTA_LOG
     TELEFONO          VARCHAR2(15) NOT NULL ,
     CODIGO_BANCO     VARCHAR2(20) NOT NULL ,
     FECHA_PROCESO     DATE NOT NULL
insert into VTA_LOG values ('11223344', 'BancoOne',  to_date('20080705162918', 'YYYYMMDDHH24MISS'));
insert into VTA_LOG values ('11223344', 'BancoTwo', to_date('20080705062918', 'YYYYMMDDHH24MISS'));
commit;Regards,
Vincent