src/main/java/com/conveyal/gtfs/loader/JdbcTableWriter.java
public int normalizeStopTimesForPattern (int id, int beginWithSequence) throws SQLException {
        try {
            JDBCTableReader<PatternStop> patternStops = new JDBCTableReader(
                Table.PATTERN_STOP,
                dataSource,
                tablePrefix + ".",
                EntityPopulator.PATTERN_STOP
            );
            String patternId = getValueForId(id, "pattern_id", tablePrefix, Table.PATTERNS, connection);
            List<PatternStop> patternStopsToNormalize = new ArrayList<>();
            for (PatternStop patternStop : patternStops.getOrdered(patternId)) {
                // Update stop times for any pattern stop with matching stop sequence (or for all pattern stops if the list
                // is null).
                if (patternStop.stop_sequence >= beginWithSequence) {
                    patternStopsToNormalize.add(patternStop);
                }
            }
            int stopTimesUpdated = updateStopTimesForPatternStops(patternStopsToNormalize);
            connection.commit();
            return stopTimesUpdated;
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        } finally {
            DbUtils.closeQuietly(connection);
        }
    }
public int normalizeStopTimesForPattern (int id, int beginWithSequence) throws SQLException {
        try {
            JDBCTableReader<PatternStop> patternStops = new JDBCTableReader(
                Table.PATTERN_STOP,
                dataSource,
                tablePrefix + ".",
                EntityPopulator.PATTERN_STOP
            );
            String patternId = getValueForId(id, "pattern_id", tablePrefix, Table.PATTERNS, connection);
            List<PatternStop> patternStopsToNormalize = new ArrayList<>();
            for (PatternStop patternStop : patternStops.getOrdered(patternId)) {
                // Update stop times for any pattern stop with matching stop sequence (or for all pattern stops if the list
                // is null).
                if (patternStop.stop_sequence >= beginWithSequence) {
                    patternStopsToNormalize.add(patternStop);
                }
            }
            int stopTimesUpdated = updateStopTimesForPatternStops(patternStopsToNormalize);
            connection.commit();
            return stopTimesUpdated;
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        } finally {
            DbUtils.closeQuietly(connection);
        }
    }
For a given pattern id and starting stop sequence (inclusive), normalize all stop times to match the pattern
stops' travel times.
@return number of stop times updated