Re: [Fwd: Re: [PHP-DB] how to update a text BLOB in ODBC?]
Jeff Stern wrote: it turns out it is probably a bug -- firebird does not have this behavior, but interbase does. they do not think it is an easysoft issue. they think if we juse use firebird here we will be fine. but we cannot risk switching to firebird, here. my IP dept would never go for it. maybe an upgrade to ib 7 would fix it, i don't know.. i am still looking further into it. anyone have any contacts at interbase? I don't know anything about BLOBs under ODBC, but I could help you with direct Interbase connectivity, which I use extensively (but not for text fields - it makes it difficult and slow to search). Let me know if you need help with direct connection BLOB handling under Interbase. I am using Firebird, not that it should make any difference. Just to sum up the problem, Interbase 6 and 6.5 (not sure about 7, I will check) does not allow you to do a literal insert into a blob, ie insert into blob_table ( blob_column ) values( 'hello' ); The only way it can be done, is via a bound parameter, that allows the ODBC driver, to catch the fact its a blob, and to use the correct methods to create and insert the blob. I only discovered that firebird supported this, when I was about to demonstrate to someone here, how the problem happened, and to my suprise, it didn't. The only other way I could suggest would involve adding support in php_odbc for binding parameters, that wouldn't be that difficult, but as the last few changes I did to php_odbc have either been backed out or altered to fit different drivers, I don't know what the developers want to do. --- Nick Gorham Easysoft Limited -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[Fwd: Re: [PHP-DB] how to update a text BLOB in ODBC?]
hi, david, thanks for responding.. David Russell wrote: Hi Jeff, Just a question - why are you using ODBC instead of PHP's native Interbase connectivity? ODBC is definitely slower. good question.. i think it pretty much boils down to the following reasons: 1) my IP dept has voiced the possibility of switching away from IB at some point because of the lack of support and common user base. i want the php code to use unified drivers so that i don't have to re-write everything at that time. 2) the php-ib api is not automatically compiled in to the php distribution which comes from redhat. while i'm not normally averse to a separate compile, it is extra effort, esp. in the case of php, where there are many compile-time flags to mimick correctly from the redhat compile. not getting these right could potentially give us even more problems down the road with more quirky "undocumented" behavior which is owed solely to my own compilation and a flag i didn't set right. i'd rather not get into it. 3) on linux (where our apache/php sits), the odbc drivers use the same shared libraries that odbc does (the odbc easysoft drivers) since as i understand it, in the later versions of ib, borland decided that the only way to connect to a remote ib server was with the unixodbc/easysoft drivers anyway, and removed the ib-specific connection libraries (something like that). 4) while much less important than the first 3, i do see a Unified ODBC interface as advantageous to us all. the various db api's are all different. thus, when i read books about PHP, and look in the sections on databasing, i see the MySQL api referred to. this doesn't do me any good because i'm an interbase user. if we all used the same api, odbc, then, even though it may be pie in the sky, we'd all -- authors, users, etc etc -- benefit from a common knowledge base, not to mention a robust and dependable api. 5) i wanted something simple: read a blob into a string (currently works) in a select statement, and write the BLOB back out from a string via update (currently does not work with ib but apparently does with firebird and others). the php-odbc api promises this ease of use, and the php-ib api does not. :( this just in: the easysoft guys wrote back to me btw, just today. it turns out it is probably a bug -- firebird does not have this behavior, but interbase does. they do not think it is an easysoft issue. they think if we juse use firebird here we will be fine. but we cannot risk switching to firebird, here. my IP dept would never go for it. maybe an upgrade to ib 7 would fix it, i don't know.. i am still looking further into it. anyone have any contacts at interbase? I don't know anything about BLOBs under ODBC, but I could help you with direct Interbase connectivity, which I use extensively (but not for text fields - it makes it difficult and slow to search). Let me know if you need help with direct connection BLOB handling under Interbase. I am using Firebird, not that it should make any difference. thank you for the offer. i will take you up on it if i do in fact end up going the php-ib api route, or in the unprobably event we switch to firebird (which the easysoft guys say works right with php-odbc api anyway).. i do appreciate your taking the time out of your day to respond, david. that was kind of you, and thank you very much. -- Jeff Stern 949-824-2326 [EMAIL PROTECTED] Social Sciences Computing Services University of California, Irvine 3151 Social Science Plz Irvine CA 92697-5100 -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP-DB] how to update a text BLOB in ODBC?
Hi Jeff,
Just a question - why are you using ODBC instead of PHP's native
Interbase connectivity? ODBC is definitely slower.
I don't know anything about BLOBs under ODBC, but I could help you with
direct Interbase connectivity, which I use extensively (but not for text
fields - it makes it difficult and slow to search).
Let me know if you need help with direct connection BLOB handling under
Interbase. I am using Firebird, not that it should make any difference.
HTH
David Russell
IT Support Manager
Barloworld Optimus (Pty) Ltd
Tel: +2711 444-7250
Fax: +2711 444-7256
e-mail: [EMAIL PROTECTED]
web: www.BarloworldOptimus.com
-Original Message-
From: Jeff Stern [mailto:[EMAIL PROTECTED]]
Sent: 20 November 2002 08:24 AM
To: Miles Thompson; Martin Allan Jensen
Cc: [EMAIL PROTECTED]
Subject: Re: [PHP-DB] how to update a text BLOB in ODBC?
thanks for the correction, miles and martin.. just an email typo.
i still have the problem though. :(
--
Jeff Stern 949-824-2326 [EMAIL PROTECTED]
Social Sciences Computing Services
University of California, Irvine
3151 Social Science Plz
Irvine CA 92697-5100
On Tue, 19 Nov 2002, Miles Thompson wrote:
> Jeff,
>
> Check your SQL. Shouldn't
> $sql = "insert into note_tbl
> (note) values ('${note}')
> where pkey = '45'";
>
> be UPDATE where pkey = '45' ?
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Description: application/pkcs7-signature
Re: [PHP-DB] how to update a text BLOB in ODBC?
Quoting Jeff Stern <[EMAIL PROTECTED]>:
> thanks for the correction, miles and martin.. just an email typo.
>
> i still have the problem though. :(
>
>
> On Tue, 19 Nov 2002, Miles Thompson wrote:
>
> > Jeff,
> >
> > Check your SQL. Shouldn't
> > $sql = "insert into note_tbl
> > (note) values ('${note}')
> > where pkey = '45'";
> >
> > be UPDATE where pkey = '45' ?
With MSSQL the blobs (text/image) can be handled with READ_IMAGE/READ_TEXT and
WRITE_IMAGE/WRITE_TEXT. This writes/reads from the paged resource directly,
bypassing the transaction log etc etc. I don't know if your DB possibly has a
similiar method?
Aside: Insert and Update work normally as well... but are fully logged.
--
Ryan T. Gallagher
[EMAIL PROTECTED]
International Studies Abroad
http://www.studiesabroad.com
(512)480-8522
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Re: [PHP-DB] how to update a text BLOB in ODBC?
thanks for the correction, miles and martin.. just an email typo.
i still have the problem though. :(
--
Jeff Stern 949-824-2326 [EMAIL PROTECTED]
Social Sciences Computing Services
University of California, Irvine
3151 Social Science Plz
Irvine CA 92697-5100
On Tue, 19 Nov 2002, Miles Thompson wrote:
> Jeff,
>
> Check your SQL. Shouldn't
> $sql = "insert into note_tbl
> (note) values ('${note}')
> where pkey = '45'";
>
> be UPDATE where pkey = '45' ?
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Re: [PHP-DB] how to update a text BLOB in ODBC?
Jeff,
Check your SQL. Shouldn't
$sql = "insert into note_tbl
(note) values ('${note}')
where pkey = '45'";
be UPDATE where pkey = '45' ?
Or, do a delete where pkey = '45' followed by an insert. In that case check
the synatx of your insert 'cause it doesn't look correct.
HTH - Miles Thompson
At 04:42 PM 11/19/2002 -0800, Jeff Stern wrote:
hi, i am having the devil of a time with this. have been researching it
for 3 weeks. have posted to php.faqts.com (no answer), looked a million
times on php.net, and www.borland.com/interbase, written people email (no
response!) and even tried to get the people at easysoft to answer (they
are working on it)..
but it's been 3 weeks now and i cannot seem to get this question answered,
and our project is waiting..
the question simply is: how to write a BLOB (sub-typwith ODBC in PHP?
fyi, it shouldn't make a difference, but i am using interbase 6.0 as the
back end, and the blob is SUB-TYPE 1 (text).
*reading* the blob is trivial with php Unified ODBC. I just use a normal
SQL select statement:
==
$sql = "select note from note_tbl where pkey = '45'";
# get result
$result = @odbc_exec($conn, $sql);
# assign values
if ( @odbc_fetch_into($result, $row)) {
$note = $row[0];
}
==
(where notes is the BLOB field). pretty simple.
however, when i try to *write* it back:
==
$sql = "insert into note_tbl
(note) values ('${note}')
where pkey = '45'";
$result = odbc_exec($conn, $sql);
==
i get an error message:
==
Invalid modify request. Conversion error from string "BLOB"
==
.. so apparently i cannot simply write the string back out to the BLOB.
(tho' IMHO if i can read in a SUB-TYPE 1 (text) BLOB that easily, then i
should be able to write it back out that easily).
apparently this is not just at the PHP Unified ODBC level.. if i run
easysoft's isql program at the command prompt and try to run the same
commands, while i don't get as specific an error message, it does return
an error:
==
SQL> update notes_tbl set note = 'hello there' where pkey = '16784'
[ISQL]ERROR: Could not SQLExecute
SQL> _
==
does anyone have some example code for how to do this (in PHP)?
i'd be most grateful..
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[PHP-DB] how to update a text BLOB in ODBC?
hi, i am having the devil of a time with this. have been researching it
for 3 weeks. have posted to php.faqts.com (no answer), looked a million
times on php.net, and www.borland.com/interbase, written people email
(no response!) and even tried to get the people at easysoft to answer
(they are working on it)..
but it's been 3 weeks now and i cannot seem to get this question
answered, and our project is waiting..
the question simply is: how to write a BLOB (sub-typwith ODBC in PHP?
fyi, it shouldn't make a difference, but i am using interbase 6.0 as the
back end, and the blob is SUB-TYPE 1 (text).
*reading* the blob is trivial with php Unified ODBC. I just use a normal
SQL select statement:
==
$sql = "select note from note_tbl where pkey = '45'";
# get result
$result = @odbc_exec($conn, $sql);
# assign values
if ( @odbc_fetch_into($result, $row)) {
$note = $row[0];
}
==
(where notes is the BLOB field). pretty simple.
however, when i try to *write* it back:
==
$sql = "insert into note_tbl
(note) values ('${note}')
where pkey = '45'";
$result = odbc_exec($conn, $sql);
==
i get an error message:
==
Invalid modify request. Conversion error from string "BLOB"
==
.. so apparently i cannot simply write the string back out to the BLOB.
(tho' IMHO if i can read in a SUB-TYPE 1 (text) BLOB that easily, then i
should be able to write it back out that easily).
apparently this is not just at the PHP Unified ODBC level.. if i run
easysoft's isql program at the command prompt and try to run the same
commands, while i don't get as specific an error message, it does return
an error:
==
SQL> update notes_tbl set note = 'hello there' where pkey = '16784'
[ISQL]ERROR: Could not SQLExecute
SQL> _
==
does anyone have some example code for how to do this (in PHP)?
i'd be most grateful..
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