Re: Separating data sets in a table

On Mon, 2002-08-26 at 07:26, Andreas Tille wrote:
> Well for sure this might be an option but as I said I receive the data
> in the dump format apropriate to use "COPY <tablemane> FROM <file>".  Would
> you really like to suggest me to split those data sets into single lines?
> Moreover I'm not sure about how to catch the error messages of failed
> COPY statements.

How about this approach:      Create a temporary table (no constraints)          CREATE TEMP TABLE temptable AS
(SELECT* FROM tablename LIMIT 1);       DELETE FROM temptable;      Copy all data into the temporary table
COPYtemptable FROM 'filepath';      Select from the temporary table all items that satisfy the   constraints, insert
theminto the real table and delete them from   the temporary table:              BEGIN;       INSERT INTO tablename
(SELECT* FROM temptable WHERE ...);       DELETE FROM temptable WHERE ...;       COMMIT;      All good data should now
bein place.  The temporary table should   now contain only those items that do not satisfy the constraints for   the
realtable.
 

-- 
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight, UK                            
http://www.lfix.co.uk/oliver
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