Foreign Key Error thrown

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Foreign Key Error thrown

doc_sewell

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April 20, 2011 at 1:30 pm

#235027

I have a SQL job (T-SQL) that inserts data from a proxy table to an audit table that foreign keys to a transactional table. The job runs fine processing the proxy table records but then throws the error: "The INSERT statement conflicted with the FOREIGN KEY constraint... "
This job ran fine but the audit table is now 336 million rows and 32GB in size. The indexing is 21GB with 4GB just for the FK index. So, what do I do? Drop and recreate the FK and/or FK index?

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GSquared SSC Guru Points: 260824 More actions · Answer 1

I'd have to see details before I could recommend anything. Table structures, et al, will be needed in order to recommend anything sensible.

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Johan Bijnens SSC Guru Points: 135369 More actions · Answer 2

Certainly there has been something wrong with a foreign key value for the inserted batch.

I would query the source table using a where not exists correlated query using the foreign key constraint primary key table.

select * /* (yes * is ok for this purpose) */

from mysource S

where not exists ( select * from FK_ParentTable PK where PK.primarykeycol(s) = S.FK_COL(s)

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doc_sewell SSC Eights! Points: 850 More actions · Answer 3

No, it returns zero. The FK appears to be working. Remember the process is like this:

ParentTable ChildTable ProxyTable

PKCol (int) FKCol (int) Receives New Records to Process

Transactions occur and changes to existing accounts become new records in the ProxyTable. A SQL job runs every minute and processes those records, which includes an INSERT into the ChildTable. This INSERT works fine, but the job returns an INSERT error about violating the Foreign key between the Child and Parent.

Johan Bijnens SSC Guru Points: 135369 More actions · Answer 4

It doesn't accept invalid FK values.

Please post ddl (the actual please) of your involved tables as well as the sqljob giving the error as well as the actual error message.

(you can script it all including the system constraint names)