Bug #80874 [Asn->Fbk]: odbc_fetch_array() will not fetch a row containing a UTF-8 currency code symbol

From: Date: Thu, 18 Mar 2021 13:03:49 +0000
Subject: Bug #80874 [Asn->Fbk]: odbc_fetch_array() will not fetch a row containing a UTF-8 currency code symbol
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=80874&edit=1

 ID:                 80874
 Updated by:         cmb@php.net
 Reported by:        tony at tonymarston dot net
 Summary:            odbc_fetch_array() will not fetch a row containing a
                     UTF-8 currency code symbol
-Status:             Assigned
+Status:             Feedback
 Type:               Bug
 Package:            ODBC related
 Operating System:   Windows 10
 PHP Version:        7.4.16
 Assigned To:        cmb
 Block user comment: N
 Private report:     N

 New Comment:

>> Doesn't it also raise a warning?
> How do I detect that? There is no ODBC function to retrieve
> warnings.

I was referring to the general PHP error reporting mechanisms.

Anyway, the ODBC trace shows whats going on:

| General error;-10427 Conversion of parameter/column (3) from
| data type NVARCHAR to ASCII failed (-10427)

Conversion to ASCII can't succeed, but PHP does not enforce that,
but rather requests binding to SQL_C_CHAR.  Is there a respective
setting to convert to UTF-8 in the driver options?

With SQL Server (ODBC Driver 17 for SQL Server) all currency
symbols are properly retrieved and displayed for me.  Watch out
for font issues (call bin2hex() to see the byte values).


Previous Comments:
------------------------------------------------------------------------
[2021-03-17 18:27:28] tony at tonymarston dot net

> Doesn't it also raise a warning?
How do I detect that? There is no ODBC function to retrieve warnings.

The trace log can be downloaded from http://www.tonymarston.net/odbc.log

I have also tried running the same test on my SQL Server database, but while it does return all 9
rows the currency_symbol column for 'THB' and 'YUAN' are being returned as
'?' instead of the expected UTF-8 symbol.

------------------------------------------------------------------------
[2021-03-17 16:02:18] cmb@php.net

> […] but the call to odbc_fetch_array() only returns the first 2
> rows and returns FALSE for the 3rd row.

Doesn't it also raise a warning?

Anyhow, I cannot reproduce this (I haven't a SAP HANA DB
available, though), so please provide an ODBC trace so we can see
what's actually happening.  If possible, put it somewhere on the
Web (e.g. gist.github.com, pastebin.com) and only post a link to
the trace here.

------------------------------------------------------------------------
[2021-03-16 18:11:38] tony at tonymarston dot net

Description:
------------
I have a database table in a SAP HANA database which contains currency codes and their symbols, but
when I try to read them in my PHP program the rows containing symbols are not returned in the result
set.

Test script:
---------------
CREATE TABLE currency (
  currency_code nvarchar(16) NOT NULL,
  currency_name nvarchar(255) NOT NULL,
  currency_symbol nvarchar(4) DEFAULT NULL,
  PRIMARY KEY (currency_code)
);

INSERT INTO currency (currency_code, currency_name, currency_symbol) VALUES ('AUD',
'Australian Dollars', NULL);
INSERT INTO currency (currency_code, currency_name, currency_symbol) VALUES ('CAD',
'Canadian Dollars', NULL);
INSERT INTO currency (currency_code, currency_name, currency_symbol) VALUES ('EUR',
'Euros', '€');
INSERT INTO currency (currency_code, currency_name, currency_symbol) VALUES ('GBP',
'UK Pounds', '£');
INSERT INTO currency (currency_code, currency_name, currency_symbol) VALUES ('JPY',
'Japanese Yen', 'Â¥');
INSERT INTO currency (currency_code, currency_name, currency_symbol) VALUES ('SGD',
'Singapore Dollar', '$');
INSERT INTO currency (currency_code, currency_name, currency_symbol) VALUES ('THB',
'Thai Baht', '฿');
INSERT INTO currency (currency_code, currency_name, currency_symbol) VALUES ('USD',
'US Dollars', '$');
INSERT INTO currency (currency_code, currency_name, currency_symbol) VALUES ('YUAN',
'Chinese Yuan Renminbi', '元');

<?php
$driver = 'HDBODBC';
$server = 'hxehost:39015';
$user   = '****';
$pswd   = '****';
$conn = odbc_connect("Driver=$driver;ServerNode=$server",$user,$pswd) OR
die('Connection to DB via ODBC failed');
$query = "SELECT * FROM test.currency ORDER BY currency_code";
if (!$result = odbc_exec($conn, $query)) {
    die("ERRORNO=".odbc_error().", ERRORMSG=".odbc_errormsg());
};
$numrows = odbc_num_rows($result);
while ($row = odbc_fetch_array($result)) {
    $array[] = array_change_key_case($row, CASE_LOWER);
    echo "<p>id={$row['CURRENCY_CODE']},
name={$row['CURRENCY_NAME']},
symbol={$row['CURRENCY_SYMBOL']}</p>\n";
} // while
odbc_free_result($result);
?>

Expected result:
----------------
The call to odbc_num_rows() returns '9' which is correct, but the call to
odbc_fetch_array() only returns the first 2 rows and returns FALSE for the 3rd row.



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



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