Library List is not being used in remote PHP DB2 connection to IBM i

问题

I've successfully connected to a remote IBM i DB2 database (AS400) from my local Windows PC via PHP. I'm using the IBM Data Server Client in conjunction with the db2_* functions in PHP. The problem I'm having is that despite my library list being set properly, it is not being used for unqualified table names. Instead it uses the current user name as the library. However, when I qualify the table names everything works like a charm.

I've confirmed that my library list is actually changing when I create the connection by querying QSYS2.LIBRARY_LIST_INFO.

$database = '<database name>';
$user = '<user name>';
$password = '<password';
$port = <port>;

$options['i5_naming'] = DB2_I5_NAMING_ON;
$options['autocommit'] = DB2_AUTOCOMMIT_OFF;
$options['i5_libl'] = 'MYLIB YOURLIB ANYLIB';

$conn = db2_connect($database, $user, $password, $options);

if ($conn) {
    echo "Connection succeeded."; //It succeeds

}
else {
    echo db2_conn_error()." | ".db2_conn_errormsg()."<br />";
    echo "Connection failed.";
}

$sql = "SELECT * FROM QSYS2.LIBRARY_LIST_INFO"; 
//Works and proves my library list reflects 
//what I passed in when creating the connection.

//$sql = "SELECT * FROM LIBRARY_LIST_INFO";
//Generates: "42S02 : [IBM][CLI Driver][AS] SQL0204N "<user name>.LIBRARY_LIST_INFO" is an undefined name. SQLSTATE=42704 SQLCODE=-204"
//where <user name> is the username used to connect to the DB.
//It should be using the library list specified when creating the connection though.  
//This holds true for any table from any library including those specified 
//when creating the connection (which includes QSYS2).

$stmt = db2_prepare($conn, $sql);
$result = db2_execute($stmt);
if($result){
    while($row = db2_fetch_assoc($stmt)){
        echo "<pre>";
        var_dump($row);  //In addition to entries for QSYS, QSYS2, QUSRSYS and QHLPSYS I get entries for MYLIB, YOURLIB and ANYLIB.
        echo "</pre>";
    }
}else{
    echo "failed<br />";
    echo db2_stmt_error()." : ".db2_stmt_errormsg()."<br />";
}

Has anyone ever run into this while enabling i5_naming when connecting to a remote DB2 server? I'm not really sure why it wouldn't be using my library list as the PHP manual states "Unqualified files are resolved using the library list for the job." when enabled. http://php.net/manual/en/function.db2-connect.php

回答1:

I finally solved this after opening a PMR with IBM. All I had to do was apply the latest Fix Pack for DB2 Connect Personal Edition.

Suggested Fix Packs for DB2 Connect:

http://www-01.ibm.com/support/docview.wss?rs=71&uid=swg21321001

Basically the DB2 Connect version I had was released prior to 2013. It was in 2013 IBM added two tier support by adding the i5_naming option. So my DB2 Connect setup was effectively ignoring the option I was passing. So that explains why the other options still went through. On the DB side, since it didn't receive a value for i5_naming - it remained as the default.

来源：https://stackoverflow.com/questions/42518809/library-list-is-not-being-used-in-remote-php-db2-connection-to-ibm-i

标签

php

db2

ibm-midrange

db2-400