[freetds] dblib bcp & freebcp
Lowden, James K
LowdenJK at bernstein.com
Wed Jun 2 12:52:22 EDT 2004
> From: freetds-bounces at lists.ibiblio.org
> [mailto:freetds-bounces at lists.ibiblio.org]On Behalf Of
> Thompson, Bill D
> Sent: June 2, 2004 12:05 PM
> I'm just finishing up my reworking of the dblibrary bcp api,
> the improvements to the processing that I put into the ct-lib
> blk library.
Loading some files recently, we noticed that Microsoft's and Sybase's bcp libraries both trim trailing blanks from char & varchar character data. You can stuff 16 characters into a char(8) if the last 8 characters are consistently blanks.
I had fixed bcp.c to handle the varchar case some time back; I added char last week.
> the -E flag (as supported by Microsoft's version) which allows you to
> control the behaviour with respect to identity columns.
> the handling of timestamp columns, as documented in
> Microsoft's version
These will both be welcome, especially timestamp.
> the "queryout" method, as supported by Microsoft's version,
> which allows you
> to specify a query (or I guess the exec of a stored
> procedure) as the source
> of a "bcp out" operation
Very nice. (Yes, "exec <proc>" should work.)
> the specification of "stdout" or "stdin" as the output/input
> file (that's an enhancement on both Sybase & MS's version)
Yay! How did you work around the fseek() in "measuring" delimited character files?
> before I submit my patch, is there anything else anyone is
> desperate for ?
bcp_moretext()? ;-) Of course, it's the only missing bcp function. I don't know what the protocol implications are; I don't know if this out-of-order data handling is only a db-lib feature, or if the server can somehow accept text data after the rest of the row data.
Looking forward to you patch, Bill. Thanks for working on this.
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