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POUnable to criteria search for matching map column (MapKeyColumn) in Oracle
 

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  1. POUnable to criteria search for matching map column (MapKeyColumn) in Oracle
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    <p>I have this entity and want to find any entities with the same property set.</p> <pre><code>@Entity public class PropertyResource { @ElementCollection @MapKeyColumn(name = "property_key") @Column(name = "property_value") @CollectionTable(name = "resource_properties") private Map&lt;String, String&gt; properties = Maps.newHashMap(); ... } </code></pre> <p>This is my implementation using criteria builder:</p> <pre><code>public List&lt;PropertyResource&gt; findDuplicateProperties(PropertyResource resource) { CriteriaBuilder builder = em.getCriteriaBuilder(); CriteriaQuery&lt;PropertyResource&gt; query = builder.createQuery(PropertyResource.class); Root&lt;PropertyResource&gt; resourceRoot = query.from(PropertyResource.class); List&lt;Predicate&gt; clauses = Lists.newArrayList(); for (Entry&lt;String, String&gt; entry : resource.getProperties().entrySet()) { MapJoin&lt;PropertyResource, String, String&gt; properties = resourceRoot.joinMap("properties", JoinType.INNER); clauses.add(builder.and(builder.equal(properties.key(), entry.getKey()), builder.equal(properties.value(), entry.getValue()))); } if (!resource.isNew()) { clauses.add(builder.notEqual(resourceRoot.get("id"), resource.getID())); } clauses.add(builder.equal(resourceRoot.get("type"), resource.getType())); return em.createQuery(query.where(clauses.toArray(new Predicate[clauses.size()]))).getResultList(); } </code></pre> <p>I am doing an extra join per property. There are not many properties and resources with same type have the same property keys. This works great in h2 which produces this:</p> <pre><code>select ... from resource_table propertyre0_ inner join resource_properties properties1_ on propertyre0_.entid=properties1_.PropertyResource_entid inner join resource_properties properties2_ on propertyre0_.entid=properties2_.PropertyResource_entid where properties1_.property_key=? and properties1_.property_value=? and properties2_.property_key=? and properties2_.property_value=? and propertyre0_.entid&lt;&gt;4 and propertyre0_.resource_type=? </code></pre> <p>For Oracle however I get this:</p> <pre><code>select ... from resource_table propertyre0_ where propertyre0_.entid&lt;&gt;230 and propertyre0_.resource_type=? </code></pre> <p>Is there anything wrong in my query?</p> <p>OBS: Almost forgot. Hibernate version is 4.1.9.Final.</p>
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    1. This table or related slice is empty.
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