# dynamicUpdate

## Purpose

Whether to dynamically build `UPDATE` queries

## Examples

    class Book {
    	static mapping = {
    		dynamicUpdate true
    	}
    }

## Description

Usage: `dynamicUpdate(boolean)`

By default Hibernate will build all queries at start-up time and cache them, which represents a significant performance gain as queries don't have to be dynamically generated at runtime. However, there are certain circumstances where dynamic queries are useful.

For example if you were using custom `UserType` to hash passwords, every time an UPDATE occurred, the password would get re-hashed. The `dynamicUpdate` method allows you to turn of the dynamic creation of queries that uses only the properties that are needed to perform the update.