Resetting a Sequence

gistfile1.txt

-- What is the result?
SELECT MAX(id) FROM your_table;

-- Then run...
-- This should be higher than the last result.
SELECT nextval('your_table_id_seq');

-- If it's not higher... run this set the sequence last to your highest id. 
-- (wise to run a quick pg_dump first...)

BEGIN;
-- protect against concurrent inserts while you update the counter
LOCK TABLE your_table IN EXCLUSIVE MODE;
-- Update the sequence
SELECT setval('your_table_id_seq', COALESCE((SELECT MAX(id)+1 FROM your_table), 1), false);
COMMIT;



SELECT MAX(id) FROM unittrust.um_counties;

SELECT nextval('unittrust.um_counties_id_seq');

SELECT setval('unittrust.um_counties_id_seq', 
COALESCE((SELECT MAX(id)+1 FROM unittrust.um_counties), 1), false);