• Seq Scan on routing: Seq Scan = Sequential Scan. Combines TableScan and SelectScan. Read the table, and filter rows using a predicate.

  • cost=...: Estimated cost (unclear what the unit is).

  • rows=...: Estimated number of rows of output.

  • width=...: Estimated average row width, in bytes.

  • Filter: The predicate used to filter rows.