How to get product related retail promotions/discounts

static void testGetAvailableDiscountsByItem2(Args _args)
{
    ItemId                                  itemId          = '0006';
    InventTable                             inventTable     = InventTable::find(itemId);
    RetailPricingDataManager                retailPricingDataManager = RetailPricingDataManager::construct(5637145360);
    Container                               promotions,
                                            priceGroups;

    MCRChannelUser                          channelUser = MCRChannelUser::find();
    RetailChannelPriceGroup                 retailChannelPriceGroup;

    while select RecId, PriceGroup from retailChannelPriceGroup
        where retailChannelPriceGroup.RetailChannel == channelUser.Channel
    {
        priceGroups += retailChannelPriceGroup.PriceGroup;
    }
    

    promotions = retailPricingDataManager.getPeriodicDiscounts(
            inventTable.Product,
            0,
            priceGroups,
            'USD',
            DateTimeUtil::getSystemDateTime()
        );
}

static void testGetAvailableDiscountsByItem(Args _args)
{
    ItemId                                  itemId = '0006';
    InventTable                             inventTable     = InventTable::find(itemId);
    RetailAllProductCategories              retailAllProductCategories;
    RetailGroupMemberLine                   retailGroupMemberLine;
    RetailPeriodicDiscountLine              retailPeriodicDiscountLine;
    RetailPeriodicDiscount                  retailPeriodicDiscount;

    // Discounts assigned to product directly
    while select retailGroupMemberLine
        where retailGroupMemberLine.Product == inventTable.Product
        join retailPeriodicDiscountLine
            where retailPeriodicDiscountLine.RetailGroupMemberLine == retailGroupMemberLine.RecId
        join retailPeriodicDiscount
            where retailPeriodicDiscount.OfferId == retailPeriodicDiscountLine.OfferId
    {
        abs(1);
    }

    // Discounts assigned to category
    while select retailGroupMemberLine
        where retailGroupMemberLine.Product == 0
        join retailAllProductCategories
            where retailAllProductCategories.Category   == retailGroupMemberLine.Category
                &&retailAllProductCategories.Product    == inventTable.Product
        join retailPeriodicDiscountLine
            where retailPeriodicDiscountLine.RetailGroupMemberLine == retailGroupMemberLine.RecId
        join retailPeriodicDiscount
            where retailPeriodicDiscount.OfferId == retailPeriodicDiscountLine.OfferId
    {
        abs(1);
    }

}

But method \Classes\RetailPricingDataManager\getPeriodicDiscounts should be slightly changed.
We need to change

    while select
            OfferId, ValidFrom, ValidTo, ConcurrencyMode, DateValidationType, ValidationPeriodId, PriceDiscGroup, Name, PeriodicDiscountType, IsDiscountCodeRequired, DiscountPercentValue

To:

    while select
            OfferId, ValidFrom, ValidTo, ConcurrencyMode, DateValidationType, ValidationPeriodId, PriceDiscGroup, Name, PeriodicDiscountType, IsDiscountCodeRequired, DiscountPercentValue, CurrencyCode

In other words just add CurrencyCode to selected fields. Otherwise it will fail in method \Classes\RetailPricingDataManager\buildRetailDiscountContainer as CurrencyCode has never been selected.

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