October 2017
Beginner to intermediate
316 pages
8h
English
Content preview from Learning Neo4j 3.x - Second Edition
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Calculating the price based on a full sweep of the tree
The first strategy that we will use to calculate the price of the product in our hierarchy will do a full sweep of the tree:
- It will start from the product at the top.
- Then, it will work its way down to every single cost component in the database.
- Then, it will return the sum of the all total prices, calculated as a product of the price of each cost component with the quantities on the relationships that connect the cost component to the product at the top.
The query for this approach is similar to the following:
match (n1:PRODUCT {id:1})<-[r1]-(:COST_GROUP)<-[r2]-(:COST_TYPE)<-[r3]-(:COST_SUBTYPE)<-[r4]-(:COST)<-[r5]-(n6:COST_COMPONENT) return sum(r1.quantity*r2.quantity*r3.quantity*r4.quantity*r5.quantity*n6.price) ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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