#27083 [Fbk->Opn]: binding blobs to procedure params corrupts them

[ceco at noxis dot net]

 ID:               27083
 User updated by:  ceco at noxis dot net
 Reported By:      ceco at noxis dot net
-Status:           Feedback
+Status:           Open
 Bug Type:         OCI8 related
 Operating System: windows 2000 server
 PHP Version:      4.3.4
 New Comment:

in examle 2 on
http://www.php.net/manual/en/function.ocinewdescriptor.php

it is used exactly like that, only it is clob

I cannot use php 5, I made workaround converting blob to hex, sending
it as clob and then reconverting it to binary ;-))
a little strange and cpu intensive but works and since it is not very
often used I'll have to leave it that way


Previous Comments:
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[2004-01-29 09:21:23] [EMAIL PROTECTED]

Don't use writeTemporary, it's not intended for writing persistent
LOB's.
You should use save() or you can upgrade to PHP5 and use $lob->write()
method.

------------------------------------------------------------------------

[2004-01-29 06:29:33] ceco at noxis dot net

Description:
------------
first of all I should say that it may be documentation problem, because
didn't find good documentation of the LOB object 

i have a oracle procedure, which accepts BLOB

(see the code below)

it inputs the data in the blob but when i extract (with the oracle
tools or with other php script) it is corrupted it is exactly 2 times
larger
when everything is changed to clob (of course the data is text not
jpg), this function work ok

also it is workig for me if I use insert into (the_blob) values
(empty_blob()) returning the_blob into :the_blob

and then bind $lob and use $lob->save

but i don't want to have this

I think $lob->WriteTemporary mangles the data somehow and corrupts it

Reproduce code:
---------------
        include_once 'config/environment.inc.php';

        $fd = fopen('Sample.jpg', 'r');
        $data = fread($fd, filesize('Sample.jpg'));
        fclose($fd);

        $conn = ocilogon($CFG_DB['username'], $CFG_DB['password'],
$CFG_DB['db']);
        $lob = OCINewDescriptor($conn, OCI_D_LOB);

        $stmt = OCIParse($conn,"begin TEST_PROC(:the_blob); end;");
        OCIBindByName($stmt, ':the_blob', &$lob, -1, OCI_B_BLOB);
        $lob->WriteTemporary($data);
        OCIExecute($stmt, OCI_DEFAULT);
        $lob->close();
        $lob->free();
        OCICommit($conn);


create procedure TEST_PROC(the_blob blob) is
begin
insert into test_table values (the_blob);
end;

create table test_table (the_blob blob);



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Edit this bug report at http://bugs.php.net/?id=27083&edit=1