Close StoredProcedureQuery if it implements AutoCloseable.

If the JPA provider's implementation of StoredProcedureQuery implements AutoCloseable, invoke the close method when completed.

Resolves #2915.
Original pull request: #2938

Author: gregturn

src/main/java/org/springframework/data/jpa/repository/query/JpaQueryExecution.java

@@ -315,24 +315,36 @@ protected Object doExecute(AbstractJpaQuery jpaQuery, JpaParametersParameterAcce
 			Assert.isInstanceOf(StoredProcedureJpaQuery.class, jpaQuery);
 
 			StoredProcedureJpaQuery storedProcedureJpaQuery = (StoredProcedureJpaQuery) jpaQuery;
+
 			StoredProcedureQuery storedProcedure = storedProcedureJpaQuery.createQuery(accessor);
 
-			boolean returnsResultSet = storedProcedure.execute();
+			try {
+
+				boolean returnsResultSet = storedProcedure.execute();
+
+				if (returnsResultSet) {
 
-			if (returnsResultSet) {
+					if (!SurroundingTransactionDetectorMethodInterceptor.INSTANCE.isSurroundingTransactionActive()) {
+						throw new InvalidDataAccessApiUsageException(NO_SURROUNDING_TRANSACTION);
+					}
 
-				if (!SurroundingTransactionDetectorMethodInterceptor.INSTANCE.isSurroundingTransactionActive()) {
-					throw new InvalidDataAccessApiUsageException(NO_SURROUNDING_TRANSACTION);
+					if (storedProcedureJpaQuery.getQueryMethod().isCollectionQuery()) {
+						return storedProcedure.getResultList();
+					} else {
+						return storedProcedure.getSingleResult();
+					}
 				}
 
-				if (storedProcedureJpaQuery.getQueryMethod().isCollectionQuery()) {
-					return storedProcedure.getResultList();
-				} else {
-					return storedProcedure.getSingleResult();
+				return storedProcedureJpaQuery.extractOutputValue(storedProcedure);
+
+			} finally {
+
+				if (storedProcedure instanceof AutoCloseable autoCloseable) {
+					try {
+						autoCloseable.close();
+					} catch (Exception ignored) {}
 				}
 			}
-
-			return storedProcedureJpaQuery.extractOutputValue(storedProcedure);
 		}
 	}