@Override
    protected Optional<Object> getDefaultValue(Column column, String defaultValue) {
        return defaultValueConverter.parseDefaultValue(column, defaultValue);
    }
Returns information about the PG server to which this instance is connected.

@return a {@link ServerInfo} instance, never {@code null}
@throws SQLException if anything fails
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/postgres-cdc/src/main/java/io/debezium/connector/postgresql/connection/PostgresConnection.java