HHH-13077 - Optimize query plan call count

hibernate-core/src/main/java/org/hibernate/internal/AbstractSharedSessionContract.java

@@ -638,11 +638,11 @@ public QueryImplementor getNamedQuery(String name) {
 		throw getExceptionConverter().convert( new IllegalArgumentException( "No query defined for that name [" + name + "]" ) );
 	}
 
-	protected QueryImplementor createQuery(NamedQueryDefinition queryDefinition) {
+	protected QueryImpl createQuery(NamedQueryDefinition queryDefinition) {
 		String queryString = queryDefinition.getQueryString();
 		final QueryImpl query = new QueryImpl(
 				this,
-				getQueryPlan( queryString, false ).getParameterMetadata(),
+				getQueryPlan( queryString, false ),
 				queryString
 		);
 		applyQuerySettingsAndHints( query );
@@ -714,7 +714,7 @@ protected void initQueryFromNamedDefinition(Query query, NamedQueryDefinition nq
 	}
 
 	@Override
-	public QueryImplementor createQuery(String queryString) {
+	public QueryImpl createQuery(String queryString) {
 		checkOpen();
 		pulseTransactionCoordinator();
 		delayedAfterCompletion();
@@ -722,7 +722,7 @@ public QueryImplementor createQuery(String queryString) {
 		try {
 			final QueryImpl query = new QueryImpl(
 					this,
-					getQueryPlan( queryString, false ).getParameterMetadata(),
+					getQueryPlan( queryString, false ),
 					queryString
 			);
 			applyQuerySettingsAndHints( query );
@@ -822,7 +822,7 @@ public <T> QueryImplementor<T> createQuery(String queryString, Class<T> resultCl
 
 		try {
 			// do the translation
-			final QueryImplementor<T> query = createQuery( queryString );
+			final QueryImpl<T> query = createQuery( queryString );
 			resultClassChecking( resultClass, query );
 			return query;
 		}
@@ -832,13 +832,10 @@ public <T> QueryImplementor<T> createQuery(String queryString, Class<T> resultCl
 	}
 
 	@SuppressWarnings({"unchecked", "WeakerAccess", "StatementWithEmptyBody"})
-	protected void resultClassChecking(Class resultClass, org.hibernate.Query hqlQuery) {
+	protected void resultClassChecking(Class resultClass, QueryImpl hqlQuery) {
 		// make sure the query is a select -> HHH-7192
-		final HQLQueryPlan queryPlan = getFactory().getQueryPlanCache().getHQLQueryPlan(
+		HQLQueryPlan queryPlan = hqlQuery.getQueryPlan();
-				hqlQuery.getQueryString(),
+
-				false,
-				getLoadQueryInfluencers().getEnabledFilters()
-		);
 		if ( queryPlan.getTranslators()[0].isManipulationStatement() ) {
 			throw new IllegalArgumentException( "Update/delete queries cannot be typed" );
 		}
@@ -914,7 +911,7 @@ protected  <T> QueryImplementor<T> buildQueryFromName(String name, Class<T> resu
 
 	@SuppressWarnings({"WeakerAccess", "unchecked"})
 	protected <T> QueryImplementor<T> createQuery(NamedQueryDefinition namedQueryDefinition, Class<T> resultType) {
-		final QueryImplementor query = createQuery( namedQueryDefinition );
+		final QueryImpl query = createQuery( namedQueryDefinition );
 		if ( resultType != null ) {
 			resultClassChecking( resultType, query );
 		}

hibernate-core/src/main/java/org/hibernate/internal/SessionImpl.java

@@ -1523,7 +1523,7 @@ public Iterator iterate(String query, QueryParameters queryParameters) throws Hi
 		queryParameters.validateParameters();
 
 		HQLQueryPlan plan = queryParameters.getQueryPlan();
-		if ( plan == null ) {
+		if ( plan == null || !plan.isShallow() ) {
 			plan = getQueryPlan( query, true );
 		}
 

hibernate-core/src/main/java/org/hibernate/query/Query.java

@@ -67,7 +67,7 @@
  * @author Steve Ebersole
  * @author Gavin King
  */
-@SuppressWarnings("UnusedDeclaration")
+@SuppressWarnings("UnusedDeclaratiqon")
 public interface Query<R> extends TypedQuery<R>, org.hibernate.Query<R>, CommonQueryContract {
 	/**
 	 * Get the QueryProducer this Query originates from.

hibernate-core/src/main/java/org/hibernate/query/internal/AbstractProducedQuery.java

@@ -1434,8 +1434,8 @@ protected QueryParameters makeQueryParametersForExecution(String hql) {
 			);
 		}
 
-	QueryParameters queryParameters = new QueryParameters(
+		QueryParameters queryParameters = new QueryParameters(
-			getQueryParameterBindings(),
+				getQueryParameterBindings(),
 				getLockOptions(),
 				queryOptions,
 				true,
@@ -1450,13 +1450,24 @@ protected QueryParameters makeQueryParametersForExecution(String hql) {
 				optionalId,
 				resultTransformer
 		);
-		queryParameters.setQueryPlan( entityGraphHintedQueryPlan );
+
+		appendQueryPlanToQueryParameters( hql, queryParameters, entityGraphHintedQueryPlan );
+
 		if ( passDistinctThrough != null ) {
 			queryParameters.setPassDistinctThrough( passDistinctThrough );
 		}
 		return queryParameters;
 	}
 
+	protected void appendQueryPlanToQueryParameters(
+			String hql,
+			QueryParameters queryParameters,
+			HQLQueryPlan queryPlan) {
+		if ( queryPlan != null ) {
+			queryParameters.setQueryPlan( queryPlan );
+		}
+	}
+
 	public QueryParameters getQueryParameters() {
 		final String expandedQuery = getQueryParameterBindings().expandListValuedParameters( getQueryString(), getProducer() );
 		return makeQueryParametersForExecution( expandedQuery );
@@ -1732,7 +1743,7 @@ public Type determineProperBooleanType(int position, Object value, Type defaultT
 				: defaultType;
 	}
 
-	private boolean isSelect() {
+	protected boolean isSelect() {
 		return getProducer().getFactory().getQueryPlanCache()
 				.getHQLQueryPlan( getQueryString(), false, Collections.<String, Filter>emptyMap() )
 				.isSelect();

hibernate-core/src/main/java/org/hibernate/query/internal/QueryImpl.java

@@ -6,8 +6,10 @@
  */
 package org.hibernate.query.internal;
 
+import org.hibernate.engine.query.spi.HQLQueryPlan;
+import org.hibernate.engine.query.spi.ReturnMetadata;
+import org.hibernate.engine.spi.QueryParameters;
 import org.hibernate.engine.spi.SharedSessionContractImplementor;
-import org.hibernate.query.ParameterMetadata;
 import org.hibernate.query.Query;
 import org.hibernate.query.spi.QueryParameterBindings;
 import org.hibernate.type.Type;
@@ -18,16 +20,19 @@
 public class QueryImpl<R> extends AbstractProducedQuery<R> implements Query<R> {
 	private final String queryString;
 
+	private final HQLQueryPlan hqlQueryPlan;
+
 	private final QueryParameterBindingsImpl queryParameterBindings;
 
 	public QueryImpl(
 			SharedSessionContractImplementor producer,
-			ParameterMetadata parameterMetadata,
+			HQLQueryPlan hqlQueryPlan,
 			String queryString) {
-		super( producer, parameterMetadata );
+		super( producer, hqlQueryPlan.getParameterMetadata() );
+		this.hqlQueryPlan = hqlQueryPlan;
 		this.queryString = queryString;
 		this.queryParameterBindings = QueryParameterBindingsImpl.from(
-				parameterMetadata,
+				hqlQueryPlan.getParameterMetadata(),
 				producer.getFactory(),
 				producer.isQueryParametersValidationEnabled()
 		);
@@ -43,6 +48,10 @@ public String getQueryString() {
 		return queryString;
 	}
 
+	public HQLQueryPlan getQueryPlan() {
+		return hqlQueryPlan;
+	}
+
 	@Override
 	protected boolean isNativeQuery() {
 		return false;
@@ -50,12 +59,14 @@ protected boolean isNativeQuery() {
 
 	@Override
 	public Type[] getReturnTypes() {
-		return getProducer().getFactory().getReturnTypes( queryString );
+		final ReturnMetadata metadata = hqlQueryPlan.getReturnMetadata();
+		return metadata == null ? null : metadata.getReturnTypes();
 	}
 
 	@Override
 	public String[] getReturnAliases() {
-		return getProducer().getFactory().getReturnAliases( queryString );
+		final ReturnMetadata metadata = hqlQueryPlan.getReturnMetadata();
+		return metadata == null ? null : metadata.getReturnAliases();
 	}
 
 	@Override
@@ -67,4 +78,22 @@ public Query setEntity(int position, Object val) {
 	public Query setEntity(String name, Object val) {
 		return setParameter( name, val, getProducer().getFactory().getTypeHelper().entity( resolveEntityName( val ) ) );
 	}
+
+	@Override
+	protected boolean isSelect() {
+		return hqlQueryPlan.isSelect();
+	}
+
+	@Override
+	protected void appendQueryPlanToQueryParameters(
+			String hql,
+			QueryParameters queryParameters,
+			HQLQueryPlan queryPlan) {
+		if ( queryPlan != null ) {
+			queryParameters.setQueryPlan( queryPlan );
+		}
+		else if ( hql.equals( getQueryString() ) ) {
+			queryParameters.setQueryPlan( getQueryPlan() );
+		}
+	}
 }

hibernate-core/src/test/java/org/hibernate/stat/internal/QueryPlanCacheStatisticsTest.java

@@ -6,22 +6,28 @@
  */
 package org.hibernate.stat.internal;
 
+import java.util.List;
 import java.util.Map;
+
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
+import javax.persistence.LockModeType;
+import javax.persistence.NamedQuery;
+import javax.persistence.Tuple;
+import javax.persistence.TypedQuery;
 
 import org.hibernate.SessionFactory;
 import org.hibernate.cfg.Environment;
 import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
 import org.hibernate.stat.QueryStatistics;
 import org.hibernate.stat.Statistics;
-
 import org.hibernate.testing.TestForIssue;
 import org.junit.Test;
 
 import static org.hibernate.testing.transaction.TransactionUtil.doInJPA;
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
 /**
@@ -39,6 +45,7 @@ public Class[] getAnnotatedClasses() {
 		};
 	}
 
+	@Override
 	protected void addConfigOptions(Map options) {
 		options.put( Environment.GENERATE_STATISTICS, "true" );
 	}
@@ -63,6 +70,7 @@ protected void afterEntityManagerFactoryBuilt() {
 	@Test
 	public void test() {
 
+		statistics.clear();
 		assertEquals( 0, statistics.getQueryPlanCacheHitCount() );
 		assertEquals( 0, statistics.getQueryPlanCacheMissCount() );
 
@@ -115,6 +123,165 @@ public void test() {
 		} );
 	}
 
+	@Test
+	@TestForIssue( jiraKey = "HHH-13077" )
+	public void testCreateQueryHitCount() {
+		statistics.clear();
+
+		doInJPA( this::entityManagerFactory, entityManager -> {
+
+			List<Employee> employees = entityManager.createQuery(
+				"select e from Employee e", Employee.class )
+			.getResultList();
+
+			assertEquals( 5, employees.size() );
+
+			//First time, we get a cache miss, so the query is compiled
+			assertEquals( 1, statistics.getQueryPlanCacheMissCount() );
+			//The hit count should be 0 as we don't need to go to the cache after we already compiled the query
+			assertEquals( 0, statistics.getQueryPlanCacheHitCount() );
+		} );
+
+		doInJPA( this::entityManagerFactory, entityManager -> {
+
+			List<Employee> employees = entityManager.createQuery(
+				"select e from Employee e", Employee.class )
+			.getResultList();
+
+			assertEquals( 5, employees.size() );
+
+			//The miss count is still 1, as no we got the query plan from the cache
+			assertEquals( 1, statistics.getQueryPlanCacheMissCount() );
+			//And the cache hit count increases.
+			assertEquals( 1, statistics.getQueryPlanCacheHitCount() );
+		} );
+
+		doInJPA( this::entityManagerFactory, entityManager -> {
+
+			List<Employee> employees = entityManager.createQuery(
+				"select e from Employee e", Employee.class )
+			.getResultList();
+
+			assertEquals( 5, employees.size() );
+
+			//The miss count is still 1, as no we got the query plan from the cache
+			assertEquals( 1, statistics.getQueryPlanCacheMissCount() );
+			//And the cache hit count increases.
+			assertEquals( 2, statistics.getQueryPlanCacheHitCount() );
+		} );
+	}
+
+	@Test
+	@TestForIssue( jiraKey = "HHH-13077" )
+	public void testCreateNamedQueryHitCount() {
+		//This is for the NamedQuery that gets compiled
+		assertEquals( 1, statistics.getQueryPlanCacheMissCount() );
+		statistics.clear();
+
+		doInJPA( this::entityManagerFactory, entityManager -> {
+
+			Employee employees = entityManager.createNamedQuery(
+				"find_employee_by_name", Employee.class )
+			.setParameter( "name", "Employee: 1" )
+			.getSingleResult();
+
+			//The miss count is 0 because the plan was compiled when the EMF was built, and we cleared the Statistics
+			assertEquals( 0, statistics.getQueryPlanCacheMissCount() );
+			//The hit count is 1 since we got the plan from the cache
+			assertEquals( 1, statistics.getQueryPlanCacheHitCount() );
+		} );
+
+		doInJPA( this::entityManagerFactory, entityManager -> {
+
+			Employee employees = entityManager.createNamedQuery(
+				"find_employee_by_name", Employee.class )
+			.setParameter( "name", "Employee: 1" )
+			.getSingleResult();
+
+			//The miss count is still 0 because the plan was compiled when the EMF was built, and we cleared the Statistics
+			assertEquals( 0, statistics.getQueryPlanCacheMissCount() );
+			//The hit count is 2 since we got the plan from the cache twice
+			assertEquals( 2, statistics.getQueryPlanCacheHitCount() );
+		} );
+	}
+
+	@Test
+	@TestForIssue( jiraKey = "HHH-13077" )
+	public void testCreateQueryTupleHitCount() {
+		statistics.clear();
+
+		doInJPA( this::entityManagerFactory, entityManager -> {
+
+			List<Tuple> employees = entityManager.createQuery(
+				"select e.id, e.name from Employee e", Tuple.class )
+			.getResultList();
+
+			assertEquals( 5, employees.size() );
+
+			//First time, we get a cache miss, so the query is compiled
+			assertEquals( 1, statistics.getQueryPlanCacheMissCount() );
+			//The hit count should be 0 as we don't need to go to the cache after we already compiled the query
+			assertEquals( 0, statistics.getQueryPlanCacheHitCount() );
+		} );
+
+		doInJPA( this::entityManagerFactory, entityManager -> {
+
+			List<Tuple> employees = entityManager.createQuery(
+				"select e.id, e.name from Employee e", Tuple.class )
+			.getResultList();
+
+			assertEquals( 5, employees.size() );
+
+			//The miss count is still 1, as no we got the query plan from the cache
+			assertEquals( 1, statistics.getQueryPlanCacheMissCount() );
+			//And the cache hit count increases.
+			assertEquals( 1, statistics.getQueryPlanCacheHitCount() );
+		} );
+
+		doInJPA( this::entityManagerFactory, entityManager -> {
+
+			List<Tuple> employees = entityManager.createQuery(
+				"select e.id, e.name from Employee e", Tuple.class )
+			.getResultList();
+
+			assertEquals( 5, employees.size() );
+
+			//The miss count is still 1, as no we got the query plan from the cache
+			assertEquals( 1, statistics.getQueryPlanCacheMissCount() );
+			//And the cache hit count increases.
+			assertEquals( 2, statistics.getQueryPlanCacheHitCount() );
+		} );
+	}
+
+	@Test
+	@TestForIssue(jiraKey = "HHH-13077")
+	public void testLockModeHitCount() {
+		statistics.clear();
+
+		doInJPA( this::entityManagerFactory, entityManager -> {
+			TypedQuery<Employee> typedQuery = entityManager.createQuery( "select e from Employee e", Employee.class );
+
+			List<Employee> employees = typedQuery.getResultList();
+
+			assertEquals( 5, employees.size() );
+
+			//First time, we get a cache miss, so the query is compiled
+			assertEquals( 1, statistics.getQueryPlanCacheMissCount() );
+			//The hit count should be 0 as we don't need to go to the cache after we already compiled the query
+			assertEquals( 0, statistics.getQueryPlanCacheHitCount() );
+
+			typedQuery.setLockMode( LockModeType.READ );
+
+			//The hit count should still be 0 as setLockMode() shouldn't trigger a cache hit
+			assertEquals( 0, statistics.getQueryPlanCacheHitCount() );
+
+			assertNotNull( typedQuery.getLockMode() );
+
+			//The hit count should still be 0 as getLockMode() shouldn't trigger a cache hit
+			assertEquals( 0, statistics.getQueryPlanCacheHitCount() );
+		} );
+	}
+
 	private void assertQueryStatistics(String hql, int hitCount) {
 		QueryStatistics queryStatistics = statistics.getQueryStatistics( hql );
 
@@ -125,6 +292,10 @@ private void assertQueryStatistics(String hql, int hitCount) {
 	}
 
 	@Entity(name = "Employee")
+	@NamedQuery(
+		name = "find_employee_by_name",
+		query = "select e from Employee e where e.name = :name"
+	)
 	public static class Employee {
 
 		@Id