[freetds] Are LOBs supported?

Sebastien FLAESCH sf at 4js.com
Tue Jan 8 11:01:21 EST 2008


Sebastien FLAESCH wrote:
>     SQLBindParameter(m_hstmt, 2, SQL_PARAM_INPUT,
>                      SQL_C_BINARY,
>                      SQL_LONGVARCHAR, 0x10000000, 0, buf2, 0,
>                      &vind1);
>     CHECK_RCODE(SQL_HANDLE_STMT,m_hstmt,"SQLBindParameter 2");

Note that we have to bind the blob params with a large size for SQL Server
drivers, otherwise you can't insert into the database...

-> get SQLSTATE 07002 "COUNT field incorrect or syntax error" ... no idea why.

Other APIs like DB2 CLI don't need to pass a size in such case.

Don't know if this matters when using SQL_DATA_AT_EXEC with FreeTDS, but
wanted to warn you about this strange thing.

Note also that we use column-wise binding to fetch rows with:

SQL_ATTR_ROW_BIND_TYPE, SQL_BIND_BY_COLUMN

The test does not use this but our driver does, so if you fix this problem
I can continue to test with our driver code.

Thanks!
Seb


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