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  • From: Sebastien FLAESCH <sf AT 4js.com>
  • To: FreeTDS Development Group <freetds AT lists.ibiblio.org>
  • Subject: Re: [freetds] Status of UTF-8 support in 0.83 dev
  • Date: Tue, 12 Aug 2008 17:03:30 +0200

Sorry I mean SQL_WVARCHAR, not SQL_NVARCHAR...

I made a little UTF-8 test (see attachment *warning*: UTF-8 file!).

Simple SQL statements without SQL parameters seem to work... (CREATE TABLE,
INSERT).
But some characters are not converted properly (iconv issue?):
The 'abcéáô' and 'abcéîô' strings become 'abceao' and 'abceio' in the
database...

Further, I can't execute an INSERT with SQLBindParameter():

When using SQL_WVARCHAR, I get an error but diagnostic info shows unreadable
strings:

Error -1 at: SQLExecute StmtH
Diagnostic info:
SQL State: \uffff\uffffu
SQL code : 0
Message :

With SQL_VARCHAR, I get this:

Error -1 at: SQLExecute StmtH
Diagnostic info:
SQL State: 42000
SQL code : 4002
Message : [FreeTDS][SQL Server]The incoming tabular data stream (TDS)
protocol stream is incorrect. The stream ended unexpectedly.


Seb

Sebastien FLAESCH wrote:
Hi all,

I would like to start some tests using ODBC in a UTF-8 environment.

What is the current status of this project?

I found this in the TODO file:

. conversion from ucs2 to utf8, provide for 2+ bytes/character

I have set ClientCharset = UTF8 in the odbc.ini file...

What SQL_* types should I use to bind buffers with SQLBindParameter
or SQLBindCol, when using UTF8 charset?

For example, would this be ok?

char v_char[41]; /* Can hold up to 10 UTF-8 characters */

SQLBindParameter(m_hstmt1, 2, SQL_PARAM_INPUT,
SQL_C_CHAR,
SQL_NVARCHAR, 10, 0, v_char, 0,
&v_ind_char);

Assuming that I use a NVARCHAR(10) in the db?

Thanks!
Seb
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/* Test UTF-8 character set
* Author: Sebastien FLAESCH
*
* The ODBC config parameter ClientCharset must be set:
* ClientCharset = UTF8
*/

static const char * g_dbname = "freetds_msvtest2_cobra";
static const char * g_usernm = "msvuser";
static const char * g_passwd = "fourjs";

#ifdef _WIN32
#include <WINDOWS.H>
#endif
#include <stdio.h>
#include <sql.h>
#include <sqlext.h>

#define CHECK_RCODE(t,h,m) \
if ( rcode != SQL_NO_DATA \
&& rcode != SQL_SUCCESS \
&& rcode != SQL_SUCCESS_WITH_INFO \
&& rcode != SQL_NEED_DATA ) { \
fprintf(stderr,"Error %d at: %s\n",rcode,m); \
getErrorInfo(t,h); \
exit(1); \
}

static int v_key;
static SQLINTEGER v_ind_key;

static char v_char[41]; /* Can hold 10 UTF-8 chars */
static SQLINTEGER v_ind_char;

static char v_varchar[41]; /* Can hold 10 UTF-8 chars */
static SQLINTEGER v_ind_varchar;

static void getErrorInfo(SQLSMALLINT sqlhdltype, SQLHANDLE sqlhandle)
{
SQLRETURN rcode = 0;
SQLCHAR sqlstate[SQL_SQLSTATE_SIZE + 1];
SQLINTEGER naterror = 0;
SQLCHAR msgtext[SQL_MAX_MESSAGE_LENGTH + 1];
SQLSMALLINT msgtextl = 0;
int ifxerror = 0;
rcode = SQLGetDiagRec((SQLSMALLINT) sqlhdltype,
(SQLHANDLE) sqlhandle,
(SQLSMALLINT) 1,
(SQLCHAR *) sqlstate,
(SQLINTEGER *) & naterror,
(SQLCHAR *) msgtext,
(SQLSMALLINT) sizeof(msgtext),
(SQLSMALLINT *) & msgtextl);
fprintf(stderr, "Diagnostic info:\n");
fprintf(stderr, " SQL State: %s\n", (char *) sqlstate);
fprintf(stderr, " SQL code : %d\n", (int) naterror);
fprintf(stderr, " Message : %s\n", (char *) msgtext);
}

main(int argc,char **argv)
{
SQLRETURN rcode;
SQLHENV m_henv;
SQLHDBC m_hdbc;
SQLHSTMT m_hstmt1;
int i,j;
const char * dbname;
const char * usernm;
const char * passwd;

if (argc == 4) {
dbname = argv[1];
usernm = argv[2];
passwd = argv[3];
} else {
dbname = g_dbname;
usernm = g_usernm;
passwd = g_passwd;
}

m_henv = NULL;
rcode = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &m_henv);
CHECK_RCODE(SQL_HANDLE_ENV,NULL,"SQLAllocHandle EnvH");

rcode = SQLSetEnvAttr(m_henv, SQL_ATTR_ODBC_VERSION, (SQLPOINTER)
SQL_OV_ODBC3, SQL_IS_UINTEGER);
CHECK_RCODE(SQL_HANDLE_ENV,m_henv,"ODBC V3");

m_hdbc = NULL;
rcode = SQLAllocHandle(SQL_HANDLE_DBC, (SQLHANDLE) m_henv, (SQLHANDLE *)
&m_hdbc);
CHECK_RCODE(SQL_HANDLE_ENV,m_henv,"SQLAllocHandle DbcH");

rcode = SQLConnect((SQLHANDLE) m_hdbc,
(SQLCHAR *) dbname,
(SQLINTEGER) SQL_NTS,
(SQLCHAR *) usernm,
(SQLINTEGER) SQL_NTS,
(SQLCHAR *) passwd,
(SQLINTEGER) SQL_NTS);
CHECK_RCODE(SQL_HANDLE_DBC,m_hdbc,"SQLConnect");

rcode = SQLSetConnectAttr(m_hdbc,
SQL_ATTR_AUTOCOMMIT, (SQLPOINTER) SQL_AUTOCOMMIT_ON,
SQL_IS_UINTEGER);
CHECK_RCODE(SQL_HANDLE_ENV,m_henv,"SQLSetConnectAttr(autocommit)");

m_hstmt1 = NULL;
rcode = SQLAllocHandle(SQL_HANDLE_STMT, m_hdbc, &m_hstmt1);
CHECK_RCODE(SQL_HANDLE_DBC,m_hdbc,"SQLAllocHandle StmtH 1");

rcode = SQLExecDirect(m_hstmt1, (SQLCHAR *) "drop table mytab王鴻",
SQL_NTS);
rcode = SQLExecDirect(m_hstmt1, (SQLCHAR *) "create table mytab王鴻 (k
int, c nchar(10), vc nvarchar(10))", SQL_NTS);
CHECK_RCODE(SQL_HANDLE_STMT,m_hstmt1,"SQLExecDirect 1.1");

rcode = SQLExecDirect(m_hstmt1, (SQLCHAR *) "insert into mytab王鴻
values (1,'aaa','aaa')", SQL_NTS);
CHECK_RCODE(SQL_HANDLE_STMT,m_hstmt1,"SQLExecDirect 1.2");
rcode = SQLExecDirect(m_hstmt1, (SQLCHAR *) "insert into mytab王鴻
values (2,'abcéáô','abcéîô')", SQL_NTS);
CHECK_RCODE(SQL_HANDLE_STMT,m_hstmt1,"SQLExecDirect 1.3");
rcode = SQLExecDirect(m_hstmt1, (SQLCHAR *) "insert into mytab王鴻
values (3,'abc王鴻','abc王鴻傑王鴻傑')", SQL_NTS);
CHECK_RCODE(SQL_HANDLE_STMT,m_hstmt1,"SQLExecDirect 1.4");

/* Now with SQL parameters */
rcode = SQLPrepare(m_hstmt1, (SQLCHAR *) "insert into mytab王鴻 values
(?,?,?)", SQL_NTS);
CHECK_RCODE(SQL_HANDLE_STMT,m_hstmt1,"SQLPrepare 1");

SQLBindParameter(m_hstmt1, 1, SQL_PARAM_INPUT,
SQL_C_LONG,
SQL_INTEGER, 0, 0, &v_key, 0,
&v_ind_key);
CHECK_RCODE(SQL_HANDLE_STMT,m_hstmt1,"SQLBindParameter 1");

SQLBindParameter(m_hstmt1, 2, SQL_PARAM_INPUT,
SQL_C_CHAR,
SQL_WCHAR, 10, 0, v_char, 0,
&v_ind_char);
CHECK_RCODE(SQL_HANDLE_STMT,m_hstmt1,"SQLBindParameter 2");

SQLBindParameter(m_hstmt1, 3, SQL_PARAM_INPUT,
SQL_C_CHAR,
SQL_WVARCHAR, 10, 0, v_varchar, 0,
&v_ind_varchar);
CHECK_RCODE(SQL_HANDLE_STMT,m_hstmt1,"SQLBindParameter 3");

/* Assign UTF-8 values using SBCS functions, sorry */
strcpy(v_char, "abc王鴻" );
v_ind_char = strlen(v_char);
strcpy(v_varchar, "abc王鴻傑王鴻傑" );
v_ind_varchar = strlen(v_varchar);

rcode = SQLExecute(m_hstmt1);
CHECK_RCODE(SQL_HANDLE_STMT,m_hstmt1,"SQLExecute StmtH");

rcode = SQLFreeHandle(SQL_HANDLE_STMT, (SQLHANDLE) m_hstmt1);
CHECK_RCODE(SQL_HANDLE_STMT,m_hstmt1,"SQLFreeHandle StmtH 1");

rcode = SQLDisconnect(m_hdbc);
CHECK_RCODE(SQL_HANDLE_DBC,m_hdbc,"SQLDisconnect");

rcode = SQLFreeHandle(SQL_HANDLE_DBC, (SQLHANDLE) m_hdbc);
CHECK_RCODE(SQL_HANDLE_DBC,m_hdbc,"SQLFreeHandle DbcH");

rcode = SQLFreeHandle(SQL_HANDLE_ENV, (SQLHANDLE) m_henv);
CHECK_RCODE(SQL_HANDLE_ENV,m_henv,"SQLFreeHandle EnvH");

}




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