Syncing Postgres Sequences for All Tables

01_sync_postgres_sequences.sql

-- https://wiki.postgresql.org/wiki/Fixing_Sequences
SELECT 'SELECT SETVAL(' ||
       quote_literal(quote_ident(PGT.schemaname) || '.' || quote_ident(S.relname)) ||
       ', COALESCE(MAX(' ||quote_ident(C.attname)|| '), 1) ) FROM ' ||
       quote_ident(PGT.schemaname)|| '.'||quote_ident(T.relname)|| ';'
FROM pg_class AS S,
     pg_depend AS D,
     pg_class AS T,
     pg_attribute AS C,
     pg_tables AS PGT
WHERE S.relkind = 'S'
    AND S.oid = D.objid
    AND D.refobjid = T.oid
    AND D.refobjid = C.attrelid
    AND D.refobjsubid = C.attnum
    AND T.relname = PGT.tablename
ORDER BY S.relname;

02_commands.sh

# this script will generate a bunch of SQL queries to fix your sequences on each table
psql -Atq -h $database_host -U $database_user -d $database_name -p 5432 -f sequence_reset.sql -o temp

# this will consume the temp file generated by the previous command
psql -h $database_host -U $database_user -d $database_name  -p 5432 -f temp