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bcp aborts on first FK violation


bcp aborts on first FK violation

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bruce.malmat
bruce.malmat
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I want to use BCP to load data from a text file.
By default, constraints are turned off in bcp, so I use the CHECK_CONSTRAINTS hint.

bcp aborts if ANY of the rows contains a FK violation. No data get loaded.

So if I add the -b 1 batch size option, it loads all data UNTIL the first FK violation, but nothing after that.

I want to load EVERYTHING ... except for the violations. But bcp won't let me. Is there a way?
Luis Cazares
Luis Cazares
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I'm not sure if bcp would allow you to do that. However, you could load all data to a staging table and insert clean data into your final table to avoid PK violations.


Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?


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Jeff Moden
Jeff Moden
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bruce.malmat (9/26/2013)
I want to use BCP to load data from a text file.
By default, constraints are turned off in bcp, so I use the CHECK_CONSTRAINTS hint.

bcp aborts if ANY of the rows contains a FK violation. No data get loaded.

So if I add the -b 1 batch size option, it loads all data UNTIL the first FK violation, but nothing after that.

I want to load EVERYTHING ... except for the violations. But bcp won't let me. Is there a way?


Yes, there is. If you take a look in Books Online for the BCP command, you'll find that the -m parameter changes the number of allowable errors. You can also use the -e parameter to identify a file where the error rows can be stored for validation and rework. Set the batch size back to at least 50,000, set -m to a very large number (like 2 billion), and let 'er rip.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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