artist_aggregated_rankings_order_direction_mapping = dict(
    asc='asc',
    ASC='asc',
    desc='desc',
    DESC='desc',
)
artist_aggregated_rankings_order_by_mapping = dict(
    CHANGE='change',
    CHART_COUNTRYCODE='dc.country',
    CHART_NAME='dc.name',
    CHART_PLATFORM='dc.platform',
    DAYS_ON_CHART='days_on_chart',
    EXIT_TIMESTAMP='exit_timestamp',
    FIRST_POSITION='first_position',
    FIRST_TIMESTAMP='first_timestamp',
    MOST_RECENT_POSITION='most_recent_position',
    MOST_RECENT_TIMESTAMP='most_recent_timestamp',
    PEAK_POSITION='peak_position',
    PEAK_TIMESTAMP='peak_timestamp',
    POSITION='position',
    PREVIOUS_POSITION='previous_position',
    PREVIOUS_TIMESTAMP='previous_timestamp',
    SOUND_RECORDING_NAME='sound_recording_name',
)