如何使用 Spring Data JPA 执行 H2 存储过程

Question

我想使用Spring Data JPA和Hibernate执行一个简单的H2数据库存储过程。

存储过程类：

public class H2StoredProcedures {
    public static String stringIn(final String inValue) {
        log.info("stringIn: '{}'", inValue);
        return inValue + "_result";
    }
}

存储过程别名：

DROP ALIAS IF EXISTS STRING_IN;
CREATE ALIAS STRING_IN FOR "H2StoredProcedures.stringIn";

在H2控制台中执行，工作正常：

CALL STRING_IN('fooIn');
PUBLIC.STRING_IN('fooIn')  
fooIn_result
(1 row, 1 ms)

Spring数据JPA存储库类：

@Procedure("STRING_IN")
String stringIn(@Param("inValue") final String inValue);

储存库测试:

@Test
public void testStringIn() throws Exception {
    assertEquals("fooIn_result", this.testRepository.stringIn("fooIn"));
}

产生以下输出：

2015-08-31 14:52:38,117 WARN  [main]: HHH000456: Named parameters are used for a callable statement, but database metadata indicates named parameters are not supported. [logger=org.hibernate.procedure.internal.ProcedureCallImpl, mdc={}]
Hibernate: {call STRING_IN(?,?)}
2015-08-31 14:52:38,119 INFO  [main]: AtomikosNonXADataSourceBean 'adminDataSource1': getConnection ( null )... [logger=com.atomikos.jdbc.nonxa.AtomikosNonXADataSourceBean, mdc={}]
2015-08-31 14:52:38,128 WARN  [main]: Error delegating 'prepareCall' call [logger=com.atomikos.jdbc.JdbcConnectionProxyHelper, mdc={}]
org.h2.jdbc.JdbcSQLException: Method "STRING_IN (H2StoredProcedures, parameter count: 2)" not found; SQL statement:
 call STRING_IN(?,?)  [90087-187]
    at org.h2.message.DbException.getJdbcSQLException(DbException.java:345)
    at org.h2.message.DbException.get(DbException.java:179)
    at org.h2.message.DbException.get(DbException.java:155)
    at org.h2.engine.FunctionAlias.findJavaMethod(FunctionAlias.java:272)
    at org.h2.expression.JavaFunction.<init>(JavaFunction.java:32)
    at org.h2.command.Parser.readJavaFunction(Parser.java:2364)
    [...]
    at org.h2.server.TcpServerThread.run(TcpServerThread.java:159)
    at java.lang.Thread.run(Thread.java:745)

    at org.h2.engine.SessionRemote.done(SessionRemote.java:622)
    at org.h2.command.CommandRemote.prepare(CommandRemote.java:68)
    at org.h2.command.CommandRemote.<init>(CommandRemote.java:45)
    at org.h2.engine.SessionRemote.prepareCommand(SessionRemote.java:492)
    at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1189)
    at org.h2.jdbc.JdbcPreparedStatement.<init>(JdbcPreparedStatement.java:72)
    at org.h2.jdbc.JdbcCallableStatement.<init>(JdbcCallableStatement.java:52)
    at org.h2.jdbc.JdbcConnection.prepareCall(JdbcConnection.java:899)
    [...]
    at com.sun.proxy.$Proxy72.prepareCall(Unknown Source)
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$1.doPrepare(StatementPreparerImpl.java:103)
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:186)
    at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareStatement(StatementPreparerImpl.java:96)
    at org.hibernate.procedure.internal.ProcedureCallImpl.buildOutputs(ProcedureCallImpl.java:407)
    at org.hibernate.procedure.internal.ProcedureCallImpl.getOutputs(ProcedureCallImpl.java:378)
    at org.hibernate.jpa.internal.StoredProcedureQueryImpl.outputs(StoredProcedureQueryImpl.java:251)
    at org.hibernate.jpa.internal.StoredProcedureQueryImpl.execute(StoredProcedureQueryImpl.java:234)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution$ProcedureExecution.doExecute(JpaQueryExecution.java:299)
    [...]
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodIntercceptor.invoke(CrudMethodMetadataPostProcessor.java:122)
    [...]
    at com.sun.proxy.$Proxy71.stringIn(Unknown Source)
    at TestRepositoryTest.testStringIn(TestRepositoryTest.java:227)
    [...]
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
2015-08-31 14:52:38,131 WARN  [main]: SQL Error: 90087, SQLState: 90087 [logger=org.hibernate.engine.jdbc.spi.SqlExceptionHelper, mdc={}]
2015-08-31 14:52:38,131 ERROR [main]: Method "STRING_IN (H2StoredProcedures, parameter count: 2)" not found; SQL statement:
 call STRING_IN(?,?)  [90087-187] [logger=org.hibernate.engine.jdbc.spi.SqlExceptionHelper, mdc={}]

具有以下存储过程的MS SQL Server数据库的相同代码按预期工作:

CREATE PROCEDURE STRING_IN
    @InValue SYSNAME,
    @OutValue NVARCHAR(255) OUTPUT
AS 
BEGIN
    SET NOCOUNT ON;
    SET @OutValue = @InValue + '_result';
    RETURN;
END;

似乎在org . spring framework . data . JPA . repository . query . storedprocedurejpaquery # createStoredProcedure()或更有可能是Hibernates org . hibernate . JPA . internal . storedprocedurequeryimpl # registerStoredProcedureParameter(String，Class，ParameterMode)中有一个错误，它们应该知道方言。

我尝试使用@NamedStoredProcedureQuery和基本上每种注释组合，但在没有找到具有2个参数的过程时，我得到了基本相同的错误。

我还尝试将带有in/out参数的版本添加到H2StoredProcess中：

public static void stringInOut(final String inValue, String outValue) {
    log.info("stringInOut: '{}'", inValue);
    outValue = inValue + "_result";
}

如果我使用 String 返回类型设置了 in/out 存储库方法：

@Procedure(procedureName = "STRING_IN_OUT")
String stringInOut(@Param("inValue") final String inValue, @Param("outValue") String outValue);

我没有得到第三个参数未找到：

2015-08-31 15:19:15,517 ERROR [main]: Method "STRING_IN_OUT (H2StoredProcedures, parameter count: 3)" not found; SQL statement:
 call STRING_IN_OUT(?,?,?)  [90087-187] [logger=org.hibernate.engine.jdbc.spi.SqlExceptionHelper, mdc={}]

如果我设置了带有 void 返回类型的 in/out 存储库方法：

@Procedure(procedureName = "STRING_IN_OUT")
void stringInOut(@Param("inValue") final String inValue, @Param("outValue") String outValue);

我得到一个错误，大概是尝试将结果映射为空：

Caused by: org.hibernate.MappingException: No Dialect mapping for JDBC type: 0
    at org.hibernate.dialect.TypeNames.get(TypeNames.java:87)
    at org.hibernate.dialect.TypeNames.get(TypeNames.java:118)
    at org.hibernate.dialect.Dialect.getHibernateTypeName(Dialect.java:653)
    at org.hibernate.loader.custom.JdbcResultMetadata.getHibernateType(JdbcResultMetadata.java:93)
    at org.hibernate.loader.custom.ScalarResultColumnProcessor.performDiscovery(ScalarResultColumnProcessor.java:62)
    at org.hibernate.loader.custom.CustomLoader.autoDiscoverTypes(CustomLoader.java:498)
    at org.hibernate.result.internal.OutputsImpl$CustomLoaderExtension.processResultSet(OutputsImpl.java:297)
    at org.hibernate.result.internal.OutputsImpl.extractResults(OutputsImpl.java:152)
    at org.hibernate.result.internal.OutputsImpl.extractCurrentResults(OutputsImpl.java:143)
    at org.hibernate.result.internal.OutputsImpl.access$100(OutputsImpl.java:52)
    at org.hibernate.result.internal.OutputsImpl$CurrentReturnState.buildOutput(OutputsImpl.java:203)
    at org.hibernate.result.internal.OutputsImpl$CurrentReturnState.getOutput(OutputsImpl.java:187)
    at org.hibernate.result.internal.OutputsImpl.getCurrent(OutputsImpl.java:108)
    at org.hibernate.jpa.internal.StoredProcedureQueryImpl.execute(StoredProcedureQueryImpl.java:234)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution$ProcedureExecution.doExecute(JpaQueryExecution.java:299)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:77)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:100)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:91)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:393)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:371)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
    ... 43 more

Answer 1

我做了一些调试，简短的回答是Hibernate JPA(至少5.0.0及以下)不支持H2Dialect的存储过程。

H2Dialect 继承 Dialect.getCallableStatementSupport（），它返回StandardCallableStatementSupport.NO_REF_CURSOR_INSTANCE。标准可调用语句支持不能正确处理 H2 “out” 参数，该参数是 Java 返回值，而不是语句参数。我尝试扩展 H2Dialect 和 StandardCallableStatementSupport 类，以创建支持 H2 可调用语句的版本。然后，我在 org.hibernate.procedure.internal.ProcedureCallImpl#buildOutputs 方法中遇到了问题。此方法实现它自己的语句准备，而不是使用 CallableStatementSupport#registerParameters 方法。似乎没有一种干净的方式来扩展ProgresserCallImpl或buildOutputs，许多待办事项，包括“完全概念证明!!!!!”，并没有给我太多的信心。我尝试了该类的修改版本，以查看在语句中不包含输出参数是否有效。我发现，虽然它调用了程序，但它不知道如何处理结果。