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fix: align all serial sequences after SQLite import #29

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fix: align all serial sequences after SQLite import #29

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30 changes: 24 additions & 6 deletions scripts/migrate_lib.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -294,12 +294,30 @@ migrate_sqlite_to_pg() {

echo ""
echo "Updating sequences..."
psql -q -c "
SELECT setval(pg_get_serial_sequence('$schema.metadata_items', 'id'), COALESCE((SELECT MAX(id) FROM $schema.metadata_items), 1));
SELECT setval(pg_get_serial_sequence('$schema.media_items', 'id'), COALESCE((SELECT MAX(id) FROM $schema.media_items), 1));
SELECT setval(pg_get_serial_sequence('$schema.media_parts', 'id'), COALESCE((SELECT MAX(id) FROM $schema.media_parts), 1));
SELECT setval(pg_get_serial_sequence('$schema.tags', 'id'), COALESCE((SELECT MAX(id) FROM $schema.tags), 1));
" >/dev/null 2>&1 || true
# Plex writes to many imported tables during startup, including devices.
# Align every owned serial sequence, not just the four common media tables.
# An empty table must leave its next sequence value at 1.
psql -v ON_ERROR_STOP=1 -q -c "
DO \$do\$
DECLARE
rec record;
max_id bigint;
BEGIN
FOR rec IN
SELECT table_schema, table_name, column_name,
pg_get_serial_sequence(format('%I.%I', table_schema, table_name), column_name) AS sequence_name
FROM information_schema.columns
WHERE table_schema = '$schema' AND column_default LIKE 'nextval%'
LOOP
IF rec.sequence_name IS NULL THEN
RAISE EXCEPTION 'No owned sequence for %.%', rec.table_name, rec.column_name;
END IF;
EXECUTE format('SELECT max(%I) FROM %I.%I', rec.column_name, rec.table_schema, rec.table_name) INTO max_id;
PERFORM setval(rec.sequence_name, coalesce(max_id, 1), max_id IS NOT NULL);
END LOOP;
END
\$do\$;
" >/dev/null || return 1

echo ""
echo "Migration summary:"
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