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Learning NHibernate 4

You're reading from   Learning NHibernate 4 Explore the full potential of NHibernate to build robust data access code

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Product type Paperback
Published in Jul 2015
Publisher Packt
ISBN-13 9781784393564
Length 402 pages
Edition 1st Edition
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Author (1):
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Suhas H Chatekar Suhas H Chatekar
Author Profile Icon Suhas H Chatekar
Suhas H Chatekar
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Table of Contents (13) Chapters Close

Preface 1. Introduction to NHibernate FREE CHAPTER 2. Let's Build a Simple Application 3. Let's Tell NHibernate About Our Database 4. NHibernate Warm-up 5. Let's Store Some Data into the Database 6. Let's Retrieve Some Data from the Database 7. Optimizing the Data Access Layer 8. Using NHibernate in a Real-world Application 9. Advanced Data Access Patterns 10. Working with Legacy Database 11. A Whirlwind Tour of Other NHibernate Features Index

Order of operations


When you save an instance of a complex entity such as Employee which may have associations to several other entities, NHibernate has to do a lot of work to figure out how to insert/update/delete particular database records. It is important to not only generate correct set of SQL statements to get the work done, but it is even more important to fire these SQL statements in right order. With complex database table structures with lot of foreign key associations, it may be daunting to figure out right order of running a set of SQL statements. NHibernate makes the job easy for us by using the following order to ensure that SQL statements always go in right order:

  1. All entity insertions in the same order they were passed into the Save method of session.

  2. All entity updates.

  3. All collection deletions.

  4. All collection element deletions, updates, and insertions.

  5. All collection insertions.

  6. All entity deletions in the same order they were passed into the Delete method of session.

You do not...

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