Here is a small sample program I wrote in PHP to help illustrates
problem I'm having. The data base is using DB2 V5R3M0. The client is
WinXP machine using the iSeries Client Access Driver ver 10.00.04.00 to
connect to the database.
The problem is that executing the exact same SQL select statement more
than twice int a row stops produces results. The first two instances
will always produce the correct results but after that it will simply
return with no results found. I've also wrote the exact same test case
with other various ODBC APIs with the same results.
I've examining the ODBC driver trace log and I am unable to find any
noticable differences between a SQL statement producing the correct
results and one that produces a no results found message. I've tried
three different ODBC driver versions and have the same results.
NOTE: This doesn't occur for EVERY select statement but it does occur
for different files with various WHERE clauses but I've been unable to
determine any relationship between working and non working repeating
select statements.
PHP SOURCE CODE:
<html> <body> <?php
$connect = odbc_connect ("AS400", "","",SQL_CUR_USE_ODBC);
if ($connect == false)
printf("Problem connecting to the database");
/* Already created
$query = "CREATE TABLE EJWLIB.BHEADW ( ";
$query .="BATCHNUM NUMERIC(5) NOT NULL, ";
$query .="COMPID CHAR(2) NOT NULL, ";
$query .="AMOUNT NUMERIC(9,2) NOT NULL, ";
$query .="BDATE DATE NOT NULL, ";
$query .="EDIREF CHAR(15), ";
$query .="FLAG CHAR(1) NOT NULL)";
$result=odbc_exec($connect,$qu*ery); */
$query = "DELETE FROM EJWLIB.BHEADW";
$result=odbc_exec($connect,$qu*ery);
$query = "INSERT INTO EJWLIB.BHEADW VALUES('1', 'FX', '361.94',
'04/22/2005', '305855545', 'O')";
$result=odbc_exec($connect,$qu*ery);
$i=0; $query="SELECT BATCHNUM FROM EJWLIB.BHEADW WHERE AMOUNT =
'361.94' AND COMPID = 'FX'";
while ($i < 5) {
$result=odbc_exec($connect,$qu*ery);
if (!$result)
echo("failed <br>");
$rows=odbc_result_all($result,*"border=1");
$i++;
}
odbc_close($connect);
?> </body> </html>
PROGRAM OUTPUT
<html>
<body>
<table border=1 ><tr><th>BATCHNUM</th></tr>
<tr><td>1</td></tr>
</table>
<table border=1 ><tr><th>BATCHNUM</th></tr>
<tr><td>1</td></tr>
</table>
<h2>No rows found</h2>
<h2>No rows found</h2>
<h2>No rows found</h2>
</body>
</html>
Strange inconsistences when repeating a query more than twice in a row 
