My database table sequencing has gone off sync, I’m getting PK violation errors on inserts. I’ve tried restarting the sequnce it but rolls back to the erroneous sequence. Please help.
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Hi there,
You could give the following a try:
- Take a backup of your database so that you could revert to it in case anything goes wrong!
- Login to psql and run the following
- Get the max value from your table:
SELECT MAX(id) FROM your_table;
- Then run the following, which 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.
Make sure to run a quick
pg_dumpfirst!
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;
Remember to be very careful when manipulating sequences and other database objects, as mistakes can lead to data corruption or loss.
Let me know how it goes!
Best,
Bobby
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