No resultset with ocibindbyname

Hi guys,

sorry for spamming your mailing list.

I have a strange problem with ocibindbyname():
I use this simple code to start an SQL query:

$sql = "Select * from projekte_generisch where pid=:data";
$conn = oci_connect("secret", "secret", "secret");
$cur = oci_parse($conn, $sql);
my_dump($conn, $cur, $sql);

$pid = "einepid";
my_dump(ocibindbyname($cur, ":data", $pid));
my_dump(oci_execute($cur));

print '<table border="1">';
while ($row = oci_fetch_array($cur, OCI_RETURN_NULLS)) {
print '<tr>';
foreach ($row as $item) {
print '<td>'.($item?htmlentities($item):' ').'</td>';
}
print '</tr>';
}
print '</table>';

But this query doesn't give me any data record (no error; empty resultset).

When I use
$sql = "Select * from projekte_generisch where pid='einepid'";
php returns the data record I'm searching for.

What could be the reason? Is there any bug in ocibindbyname or am I
using it the wrong way.

When I use adodb (http://adodb.sf.net) I get the same error:
Using :variable in my query doesn't work but putting the string directly
into the query string it works fine.

What the f*** am I doing wrong?
Any hints are appreciated.

Cheers,
Manuel

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manuel.schoelling [ So, 24 Februar 2008 20:40 ] [ ID #1925535 ]

Re: No resultset with ocibindbyname

Manuel Schölling wrote:
> Hi guys,
>
> sorry for spamming your mailing list.
>
> I have a strange problem with ocibindbyname():
> I use this simple code to start an SQL query:

> But this query doesn't give me any data record (no error; empty resultset).

I couldn't reproduce your problem. What does your table look like?
What version of PHP & OCI8? What version of Oracle?

I tried this script:

<?php

$conn = oci_connect('hr', 'hrpwd', '//localhost/XE');

$stmtarray = array(
"drop table projekte_generisch",
"create table projekte_generisch (pid varchar2(40))",
"insert into projekte_generisch (pid) values ('einepid')"
);

foreach ($stmtarray as $stmt) {
$s = oci_parse($conn, $stmt);
[at] oci_execute($s);
}

$sql = "Select * from projekte_generisch where pid=:data";
$cur = oci_parse($conn, $sql);
var_dump($conn, $cur, $sql);

$pid = "einepid";
var_dump(ocibindbyname($cur, ":data", $pid));
var_dump(oci_execute($cur));

print '<table border="1">';
while ($row = oci_fetch_array($cur, OCI_RETURN_NULLS)) {
print '<tr>';
foreach ($row as $item) {
print '<td>'.($item?htmlentities($item):' ').'</td>';
}
print '</tr>';
}
print '</table>'

?>

The output is:

$ ~/php/bin/php t1.php
resource(5) of type (oci8 connection)
resource(9) of type (oci8 statement)
string(48) "Select * from projekte_generisch where pid=:data"
bool(true)
bool(true)
<table border="1"><tr><td>einepid</td><td>einepid</td></tr></table>

(The value is repeated because the array contains numerically and
associatively indexed values.)

Chris

--
Christopher Jones, Oracle
Email: christopher.jones [at] oracle.com Tel: +1 650 506 8630
Blog: http://blogs.oracle.com/opal/ Free PHP Book: http://tinyurl.com/f8jad

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Christopher Jones [ Mo, 25 Februar 2008 19:56 ] [ ID #1925737 ]

Re: No resultset with ocibindbyname

Hi Christopher,

thanks for caring about my problem. ;)

> I couldn't reproduce your problem. What does your table look like?
> What version of PHP & OCI8? What version of Oracle?
I using PHP 5.2.5 on a Linux 2.6.9 machine. The version of OCI8 is 1.2.4
(Revision 1.269.2.16.2.38, Oracle Instant Client Version 10.2).

The output of "select * from v$version" is:
Oracle8i Enterprise Edition Release 8.1.7.0.0 - Production
PL/SQL Release 8.1.7.0.0 - Production
CORE 8.1.7.0.0 Production
TNS for IBM/AIX RISC System/6000: Version 8.1.7.0.0 - Developmen
NLSRTL Version 3.4.1.0.0 - Production

And here is the output of "desc projekte_generisch":
Name Null? Type
PID NOT NULL CHAR(8)
ANFANG NOT NULL VARCHAR2(8)
ENDE VARCHAR2(8)
LAENGE NOT NULL NUMBER

And of course the data record I am searching for.

select * FROM projekte_generisch where pid='u0test'
PID ANFANG ENDE LAENGE
u0test utest 8

Hope this helps diagnosting the error.

Cheers,
Manuel

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manuel.schoelling [ Di, 26 Februar 2008 00:03 ] [ ID #1925738 ]

Re: No resultset with ocibindbyname

Manuel Schölling wrote:
> Hi Christopher,
>
> thanks for caring about my problem. ;)
>
>> I couldn't reproduce your problem. What does your table look like?
>> What version of PHP & OCI8? What version of Oracle?
> I using PHP 5.2.5 on a Linux 2.6.9 machine. The version of OCI8 is 1.2.4
> (Revision 1.269.2.16.2.38, Oracle Instant Client Version 10.2).
>
> The output of "select * from v$version" is:
> Oracle8i Enterprise Edition Release 8.1.7.0.0 - Production
> PL/SQL Release 8.1.7.0.0 - Production
> CORE 8.1.7.0.0 Production
> TNS for IBM/AIX RISC System/6000: Version 8.1.7.0.0 - Developmen
> NLSRTL Version 3.4.1.0.0 - Production
>
> And here is the output of "desc projekte_generisch":
> Name Null? Type
> PID NOT NULL CHAR(8)
> ANFANG NOT NULL VARCHAR2(8)
> ENDE VARCHAR2(8)
> LAENGE NOT NULL NUMBER
>
> And of course the data record I am searching for.
>
> select * FROM projekte_generisch where pid='u0test'
> PID ANFANG ENDE LAENGE
> u0test utest 8
>
> Hope this helps diagnosting the error.

Do other queries with binds work? Is PHP using the correct
NLS language configuration?

Chris


--
Christopher Jones, Oracle
Email: christopher.jones [at] oracle.com Tel: +1 650 506 8630
Blog: http://blogs.oracle.com/opal/ Free PHP Book: http://tinyurl.com/f8jad

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Christopher Jones [ Mi, 27 Februar 2008 03:03 ] [ ID #1926344 ]

Re: No resultset with ocibindbyname

> And here is the output of "desc projekte_generisch":
> Name Null? Type
> PID NOT NULL CHAR(8)
> ANFANG NOT NULL VARCHAR2(8)
> ENDE VARCHAR2(8)
> LAENGE NOT NULL NUMBER

I believe the problem has to do with your field type for PID. When you run:

select * FROM projekte_generisch where pid='u0test'

Oracle either autotrims or autopads (I'm not sure which) so that
'u0test' matches PID even though PID has a fixed 8-character length. But
when you use bind variables, this doesn't happen. So you'll need to use:

select * FROM projekte_generisch where trim(pid)=:pid

Or you can change the field definition on PID to varchar2.

I tested this on one of our tables which has a char(4) primary key to
verify all this:

select count(*) from subject_area where subject_area = 'EE';

returns 1. But using a bind variable:

declare
v_sa varchar2(10);
v_count number;
begin
v_sa := 'EE';
select count(*) into v_count
from subject_area where subject_area = v_sa;
dbms_output.put_line(v_count);
end;

returns a 0.

-Roberto

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Roberto Mansfield [ Mi, 27 Februar 2008 16:22 ] [ ID #1926353 ]

Re: No resultset with ocibindbyname

Hi,

> select * FROM projekte_generisch where trim(pid)=:pid
Thanks Roberto!
This solution with trim() works like a charm!

Cheers,
Manuel

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manuel.schoelling [ Mi, 27 Februar 2008 18:30 ] [ ID #1926354 ]

Re: No resultset with ocibindbyname

Roberto Mansfield wrote:

>> PID NOT NULL CHAR(8)

> I believe the problem has to do with your field type for PID. When you run:
>
> select * FROM projekte_generisch where pid='u0test'
>
> Oracle either autotrims or autopads (I'm not sure which) so that
> 'u0test' matches PID even though PID has a fixed 8-character length. But
> when you use bind variables, this doesn't happen. So you'll need to use:

Hi Roberto,

Well spotted!

I can see a minor inconsistency between oci_bind_array_by_name() and
the much older oci_bind_by_name() call. You can pass SQLT_AFC (i.e
the CHAR type) to the former but not the latter.

If anyone volunteers to write some test cases I can merge a patch to
OCI8 to allow:

oci_bind_by_name($s, ':bv', $bv, -1, SQLT_AFC);

Chris

--
Christopher Jones, Oracle
Email: christopher.jones [at] oracle.com Tel: +1 650 506 8630
Blog: http://blogs.oracle.com/opal/ Free PHP Book: http://tinyurl.com/f8jad

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Christopher Jones [ Mi, 27 Februar 2008 20:37 ] [ ID #1926355 ]
PHP » gmane.comp.php.database » No resultset with ocibindbyname

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