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How can I avoid n+1 SQL SELECT queries when running a Hibernate query?

April 26, 2017avoid hibernate queries query running select sql

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How can I avoid n+1 SQL SELECT queries when running a Hibernate query?

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Follow the best practices guide! Ensure that all and mappings specify lazy=”true” in Hibernate2 (this is the new default in Hibernate3). Use HQL LEFT JOIN FETCH to specify which associations you need to be retrieved in the initial SQL SELECT. A second way to avoid the n+1 selects problem is to use fetch=”subselect” in Hibernate3. If you are still unsure, refer to the Hibernate documentation and Hibernate in Action.