got it working - many thanks!
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Postgres - Duplicate key value violates unique constraint
Hi Experts,
I thought I fixed this - funny thing is - it was sort of fixed...
When doing INSERT statements, I use the following form with 'serial' columns (my customer_id column is a serial type)
INSERT INTO Customers (Customer_ID, Telephone) VALUES (DEFAULT, '123-456-7890')
I started with a fresh new database - I was able to do a couple of these inserts like so.
I start again withj a new database and import lots of records by running inserts with explicitly set values for Customer_ID. This works fine. But when I try to run the above INSERT (with DEFAULT instead of an explicitly set Customer_ID), I get the error, "duplicate key value violates unique constraint "custmoers_pkey".
I looked in pgAdmin III at the info associated with customers_pkey:
customers_pkey:
Name customers_pkey
OID 19027
Index OID 19026
Tablespace pg_default
Columns Customer_id
Unique? Yes
Primary? Yes
Clustered? Yes
Access method btree
Constraint
System index? Yes
Thanks for any help!
Mike
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by: ivanovnPosted on 2008-03-12 at 07:08:43ID: 21106073
Mike,
Similar to my answer in your other thread, the sequence is not smart enough to set itself to the latest value you explicitly inserted into the table. Without setting the sequence to the latest number using something like I posted in your other thread, I don't think you are able to achieve what you are trying to achieve. Once you run inserts without using the sequence explicitly, the sequence becomes useless until it's set to a proper value. I am guessing the best advice I can give you is to not use explicit inserts if you are to use sequence.
Good luck.
Reference thread: http://www.experts-exchang