Re: SQLGetData() returns TEXT length minus one on Solaris 64b with SQL Server 2005

Hi,
  where is SQL_DATA_AT_EXEC in your code?

Which DM are you using? Is possible that for some reason DM call some
additional function to do some checks. This could discovered enabling
FreeTDS dump.

Quire strange it works correctly on Linux but not on Solaris.
Does data contains no-ASCII characters?
How long are usually these TEXT fields?
Which TDS protocol version are you using?
There is a specific getdata test for this stuff and should work.

Regards,
  Frediano

2013/2/2 Sebastien FLAESCH <[email protected]>:
> Hi Frediano,
>
> FYI, we use a single-byte encoding (LANG=POSIX) ...
>
> Here is the code we use, nothing particular, this is the same code we
> use for different ODBC drivers...
>
> #define BLOB_BLOCK_SIZE 4096
> ....
> static SQLRETURN getBlobPieces(SqlStatement * st, SQLUSMALLINT fpos,
>                                 SQLSMALLINT ctype, MyLocator * loc,
>                                 FILE * out, SQLLEN * plen)
> {
>      SQLRETURN r = 0;
>      char buf[BLOB_BLOCK_SIZE];
>      SQLLEN len;
>      int i = 0;
>      while (1) {
>          r = SQLGetData(st->stmtHandle, fpos, ctype,
>                         (SQLPOINTER) buf, sizeof(buf), &len);
>          if (!SQL_SUCCEEDED(r) || len == 0 || len == SQL_NULL_DATA)
>              break;
>          if (len > (SQLLEN) sizeof(buf) || len == SQL_NO_TOTAL)
>              len = sizeof(buf);
>          /* Char data piece get \0, these must be removed! */
>          if (ctype == SQL_C_CHAR) {
>              if (buf[len - 1] == '\0') {
>                  len--;
>              }
>          }
>          fwrite(buf, 1, len, out);
>      }
>      *plen = len;
>      return r;
> }
>
> Am I missusing SQLGetData()? As you can see, I modify the len after
> Does this affect the next call to SQLGetData()?
>
> Anyway, the INITIAL len returned by SQLGetData() is for sure:
>
>     (total-bytes - 1)
>
> When using UTF-8, I get SQL_NO_TOTAL in the first call, but in ASCII,
> I get the (total size - 1)...
>
> Seb
>
> On 02/02/2013 08:52 AM, Frediano Ziglio wrote:
>> Il giorno 31/gen/2013, alle ore 14:28, Sebastien FLAESCH<[email protected]>  ha scritto:
>>
>>> Hi all,
>>>
>>> Context:
>>>
>>> $ uname -a
>>> SunOS s64x100 5.10 Generic_120012-14 i86pc i386 i86pc
>>>
>>> FreeTDS versions tested:
>>> - freetds-0.92.dev.20120312
>>> - freetds-dev.0.92.377
>>>
>>> When fetching a TEXT from the database (SQL Server 2005), using SQL_DATA_AT_EXEC,
>>> it appears that the SQLGetData() function returns the size of the text data,
>>> minus one...
>>>
>>> I have tested the same FreeTDS version on a Linux 32b, and SQLGetData() returns
>>> the correct length as expected...
>>>
>>
>> Strange! How do you read the length?
>>
>>> I will continue to investigate, but I wanted to ask if this is a know issue.
>>>
>>> When connecting to SQL Server 2008 R2, this does not occur, because SQLGetData()
>>> returns SQL_NO_TOTAL and we fetch text pieces in a different way...
>>>
>>
>> This is done to deal with different encodings.
>>
>>> Thanks
>>> Seb
>>
>> Frediano
>>
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