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Doc Bug #68537 oci_bind_by_name() should provide unity length description
Submitted: 2014-12-02 08:32 UTC Modified: 2017-01-28 12:48 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: ikonta at yandex dot ru Assigned: sixd (profile)
Status: Assigned Package: OCI8 related
PHP Version: 5.4.35 OS: Gentoo GNU/Linux
Private report: No CVE-ID: None
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From: ikonta at yandex dot ru
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 [2014-12-02 08:32 UTC] ikonta at yandex dot ru
Description:
------------
After migrating to UTF8, database provides two-way semantics for text data types: byte (for single byte encodings is a synonim of char) and char.
http://docs.oracle.com/cd/B28359_01/server.111/b28318/datatype.htm#CNCPT012

Length field in oci_bind_by_name() function forcely expect byte data size.
For now we should update documentation noting it.
For future development, ma be it is reasonable to add a modifier to switch between char and byte semantics.

SQL> CREATE TABLE EXAMPLE (
	MESSAGE		VARCHAR2(16 CHAR) NOT NULL
);

Oracle's client locale is:
NLS_LANG=RUSSIAN_RUSSIA.AL32UTF8

Test script:
---------------
<?php
  require_once("../inc/conn.inc");
  $conn = conn("UPO");
  $var = "тест-тест";

  $stid = oci_parse($conn, 'INSERT INTO EXAMPLE VALUES (:bv)');
  oci_bind_by_name($stid, ':bv', $var, 9);
  if (oci_execute($stid)) {
    echo ("insert OK");
    oci_free_statement($stid);
    oci_close($conn);
  }
  else
    echo ("insert failed");

?>

Expected result:
----------------
If client's locale is NLS_LANG=RUSSIAN_CIS.CL8ISO8859P5 properly encoded (translated from UTF8 back to ISO-8859-5) script works fine.

I expect the same for modern UTF8 locale.

Or at least proper description of issued function: what and how should be corrected.

Actual result:
--------------
If client is configured to use UTF8 locale, quoted script failes with ORA-01461 (can bind a LONG value only for insert into a LONG column) error.
Originally it was find for binding output variables for call of PL/SQL procedure.
In that case the error message was ORA-06525: Length Mismatch for CHAR or RAW data

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 [2014-12-02 22:25 UTC] sixd@php.net
-Assigned To: +Assigned To: sixd
 [2014-12-02 22:25 UTC] sixd@php.net
The PHP OCI8 bind lengths are bytes, as you noted.  The underlying Oracle OCI C library documents this appropriately "This size is always expected to be the size in bytes". (http://docs.oracle.com/database/121/LNOCI/oci16rel003.htm#LNOCI17140)

The PHP OCI8 doc needs to have similar wording. There are no plans to allow PHP OCI8 specify the size in characters.
 [2014-12-04 10:12 UTC] ikonta at yandex dot ru
> The PHP OCI8 bind lengths are bytes, as you noted.  The underlying
> Oracle OCI C library documents this appropriately "This size is
> always expected to be the size in bytes".
> (http://docs.oracle.com/database/121/LNOCI/oci16rel003.htm#LNOCI17140)

Not always.
Depending on NLS settings I can reproduce another result.
At least for currently used =dev-db/oracle-instantclient-basic-11.2.0.4 (and the same server).
Although, documentation may describe as it _should_ work, but not as it really works. Or it wasn't properly updated to correctly describe UTF8 handling in Oracle 11g yet.

If web-server is started in default locale, with also UTF8 charset:
NLS_LANG=AMERICAN_AMERICA.UTF8
the quoted test script succeed.
I.e. 9 chars, eight of which are two-byte length, are binded into variable with length limit 9 (unit, which should mean "byte").
 [2017-01-28 12:48 UTC] cmb@php.net
-Package: Documentation problem +Package: OCI8 related
 
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