INSERT INTO #{to_table} (id, latitude, longitude, user_id, visible, tags, timestamp, tile)
SELECT id, ROUND(latitude * 10000000), ROUND(longitude * 10000000),
user_id, visible, tags, timestamp,
tile_for_point(CAST(ROUND(latitude * 10000000) AS INTEGER),
CAST(ROUND(longitude * 10000000) AS INTEGER))
FROM #{from_table}
INSERT INTO #{to_table} (id, latitude, longitude, user_id, visible, tags, timestamp, tile)
SELECT id, ROUND(latitude * 10000000), ROUND(longitude * 10000000),
user_id, visible, tags, timestamp,
tile_for_point(CAST(ROUND(latitude * 10000000) AS INTEGER),
CAST(ROUND(longitude * 10000000) AS INTEGER))
FROM #{from_table}