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Graph Data Processing with Cypher

Graph Data Processing with Cypher

By : Ravindranatha Anthapu
4.7 (10)
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Graph Data Processing with Cypher

Graph Data Processing with Cypher

4.7 (10)
By: Ravindranatha Anthapu

Overview of this book

While it is easy to learn and understand the Cypher declarative language for querying graph databases, it can be very difficult to master it. As graph databases are becoming more mainstream, there is a dearth of content and guidance for developers to leverage database capabilities fully. This book fills the information gap by describing graph traversal patterns in a simple and readable way. This book provides a guided tour of Cypher from understanding the syntax, building a graph data model, and loading the data into graphs to building queries and profiling the queries for best performance. It introduces APOC utilities that can augment Cypher queries to build complex queries. You’ll also be introduced to visualization tools such as Bloom to get the most out of the graph when presenting the results to the end users. After having worked through this book, you’ll have become a seasoned Cypher query developer with a good understanding of the query language and how to use it for the best performance.
Table of Contents (18 chapters)
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1
Part 1: Cypher Introduction
4
Part 2: Working with Cypher
9
Part 3: Advanced Cypher Concepts

Loading data with LOAD CSV using batching

When you have a large amount of data, then you should try to commit the data in batches so that you do not need a large heap to process the data.

There are two options to process the data in batches.

  • USING PERIODIC COMMIT
  • CALL IN TRANSACTIONS

Let’s now go through these two options next.

USING PERIODIC COMMIT

This is an older syntax and is deprecated from Neo4j 4.4 version onward, but if you are using Neo4j software prior to this version, then you must use this option to commit data in batches:

:auto USING PERIODIC COMMIT 1
LOAD CSV WITH HEADERS from "file:///data.csv" AS row
WITH row
MERGE (p:Person {id:row.id})
SET p.firstName = row.firstName,
    p.lastName = row.lastName

This command will execute a commit after processing one row at a time.

CALL IN TRANSACTIONS

This is the newer syntax and is available from Neo4j 4.4 onward:

:auto LOAD CSV WITH HEADERS from ...

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