Re: How to apply Bulk Copy hints when using ctlib ?

Hello again,

You wrote:

> As long as blkdesc->bcpinfo.hint points to a valid string

I'm using 0.82 of FreeTDS and my BLKDESC structure boils down to this,
in ctlib.h:

struct _cs_blkdesc
{
	CS_CONNECTION *con;
	CS_CHAR *tablename;
	CS_CHAR *insert_stmt;
	CS_INT direction;
	CS_INT identity_insert_on;
	CS_INT bind_count;
	CS_INT xfer_init;
	CS_INT var_cols;
	TDSRESULTINFO *bindinfo;
};

I don't have a bcpinfo member.
Please can you tell me if you are referring to a newer version of
FreeTDS, or perhaps I have misunderstood your suggestion?

Many thanks,
Mark.

On 3 March 2011 17:03,  <[email protected]> wrote:
> On Thu, Mar 03, 2011 at 01:21:53PM +0200, Mark Songhurst wrote:
>> I'm using FreeTDS 0.82 on Linux RedHat Enterprise 4.0 x64. My database
>> is MS SQL Server 2008 Standard Edition.
>> I'm programming in C and using the ctlib API of FreeTDS.
> ...
>> I need the constraint active during the bulk copy to ensure bad data
>> is rejected (it's ok for the whole bulk copy to fail if only one data
>> item is bad).
> ...
>> Please can you suggest how I can keep constraints enabled during a
>> bulk copy using the ctlib API?
>
> To do that, you'll need to modify ct-lib.  Hard, but not too hard.
>
> In db-lib, we extended the possible values of bcp_options to include hints, and
> allowed hints to be passed as literal strings.  See
> src/dblib/bcp.c::bcp_options().
>
> You can extend blk_props in the same way.  As long as blkdesc->bcpinfo.hint
> points to a valid string e.g. "CHECK_CONSTRAINTS", the tds library will send it
> to the server before sending the first row.
>
> It should work!  :-)
>
> HTH.
>
> --jkl
>
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-- 
Thanks,
Mark