ODBC functions SQLExecDirectW and SQLExecute functions return error:"DIAG [22001] [Microsoft][SQL Server Native Client 10.0]String data, right truncation (0) "

Question

Problem Description:
ODBC functions SQLExecDirectW and SQLExecute functions return error:”DIAG [22001] [Microsoft][SQL Server Native Client 10.0]String data, right
truncation (0) “. When we enable tracing in the ODBC administrator, in the SQL.log we see that values for the arguments: ColumnSize, BufferLength, and StrLen_or_IndPtr of ODBC function SQLBindParameter are not being displayed.
Environment Used:
OS: Microsoft Windows Server 2003 R2 Standard x64 Edition.
Complier: Microsoft Visual Studio 2008 SP1 for x64.
Database: Microsoft SQL Server 2008
MDAC: Microsoft Data Access Components SDK 2.8
Note: This problem is seen only in our 64bit application. However, in 32bit
SQLExecDirectW and SQLExecute functions return successfully.
As we could not find the values of 6^th, 9^th and 10^th arguments(ColumnSize,
BufferLength, and StrLen_or_IndPtr) passed to
SQLBindParameter in the ODBC traces for 64bit, we are not sure whether the values for the above mentioned arguments are received correctly by SQLBindParameter or not. This information would help us to debug further. So, could you please let us know why
these values are not displayed.
1)Here is the extract of the SQL.log file for 32bit where the values for SQLULEN , SQLLEN and SQLLEN* are displayed properly:
PR0CNFG 1028-15f0 ENTER SQLBindParameter
HSTMT 0x006FBDD8
UWORD 1
SWORD 1 <SQL_PARAM_INPUT>
SWORD -8 <SQL_C_WCHAR>
SWORD -9 <SQL_WVARCHAR>
SQLULEN 23
SWORD 0
PTR 0x0595EBBA
SQLLEN 46
SQLLEN * 0x05A5FB00
2)Here is the extract of the SQL.log file for 64bit where the values for SQLULEN , SQLLEN are not displayed properly and
SQLExecDirectW function return error:”DIAG
[22001] [Microsoft][SQL Server Native Client 10.0]String data, right truncation (0) “. :
PR0CNFG a78-fe4 ENTER SQLBindParameter
HSTMT 000000000431D2F0
UWORD 1
SWORD 1 <SQL_PARAM_INPUT>
SWORD -8 <SQL_C_WCHAR>
SWORD -9 <SQL_WVARCHAR>
SQLULEN SQLULEN SWORD 0
PTR 0x0000000005364EFA
SQLLEN SQLLEN
SQLLEN * SQLLEN *
PR0CNFG a78-fe4 EXIT SQLBindParameter with return code 0 (SQL_SUCCESS)
HSTMT 000000000431D2F0
UWORD 1
SWORD 1 <SQL_PARAM_INPUT>
SWORD -8 <SQL_C_WCHAR>
SWORD -9 <SQL_WVARCHAR>
SQLULEN SQLULEN SWORD 0
PTR 0x0000000005364EFA
SQLLEN SQLLEN SQLLEN *

Answer 1

Hi Nalsr,
From my research, I found:
"[Microsoft][ODBC SQL Server Driver]String
data right truncation" error may be returned from a call to
SQLBindParameter if the size of the string parameter being used is greater than the size of the column being compared to. In other words if the
string size of the <expression> to the left of the <comparison_operator> is less than the
string size of the <expression> to the
right, ODBC may return this error.
The resolution is to make the string size of the <expression> to the
right of the <comparison_operator> less than or equal to the
string size of the <expression> on the left.
It is difficult to track down this type of problem when third party development applications are being used. ODBC Trace can be used to help determine if this problem is occuring.
Here is an example where the customer has submitted a query "select count(*) from type1 where type1 = ?", type1 is varchar(5) and the
data type being passed by the application is char[9].
Here is the relevant portion of the trace. The following information from the "exit" of SQLDescribeParam
SWORD * 0x0095e898 (12)
UDWORD * 0x0095e880 (5)
Maps to the following with the actual value in parenthesis - SQL_VARCHAR Size 5:
SQLSMALLINT *DataTypePtr
SQLUINTEGER *ParameterSizePtr
The "exit" value from SQLBindParameter provides the following
information:
SWORD 1 <SQL_PARAM_INPUT>
SWORD 1 <SQL_C_CHAR>
SQL Data Type SWORD 12 <SQL_VARCHAR>
Parameter Size UDWORD 5
SWORD 0
Value PTR 0x0181c188
Value Buffer Size SDWORD 5
String Length SDWORD * 0x0181c103 (9)
The string length parameter is the length of the
string being bound to the parameter, in this instance there is a size mismatch which results in the SQLError and the SQLErrorW with the message "[Microsoft][ODBC SQL Server
Driver]String data
right truncation" .
Hope this could be helpful.
Best regards,
Halin Huang