HSQLDB prepareStatement ("SET SCHEMA?") 오류

Question

HSQLDB와의 연결이 필요한 Jbatch 서비스를 작성하고 있지만 특정 시점에 NullPointerException (및 일부 SQLExceptions/PersistenceExceptions)이 발생합니다. 디버깅 클래스 JDBCPersistenceManagerImpl.java에서 SCHEMA를?로 설정했지만 HSQLDB 에서처럼 지원되지 않는 것으로 나타났습니다.

private void setSchemaOnConnection(Connection connection) throws SQLException { 
     logger.finest("Entering " + CLASSNAME +".setSchemaOnConnection()"); 

     if (!"Oracle".equals(connection.getMetaData().getDatabaseProductName())) { 
      PreparedStatement ps = null; 
      ps = connection.prepareStatement("SET SCHEMA ?"); -->ps = NullPointerException 
      ps.setString(1, schema); 
      ps.executeUpdate(); 
      ps.close(); 
     } 

     logger.finest("Exiting " + CLASSNAME +".setSchemaOnConnection()"); 
    } 

수정 방법에 대한 의견이 있으십니까? 나는 이미 다른 데이터베이스 (H2 db)를 시도했지만 문제는 동일하다.

이 전체 스택 추적입니다 :

javax.batch.operations.JobStartException: com.ibm.jbatch.container.exception.PersistenceException: java.sql.SQLException: java.lang.NullPointerException java.lang.NullPointerException 

    at com.ibm.jbatch.container.api.impl.JobOperatorImpl.start(JobOperatorImpl.java:92) 
    at factory.jf.privacy.service.loggedareasfilter.batch.AzzaTest.testBatchChunkException(AzzaTest.java:22) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) 
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) 
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) 
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) 
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) 
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) 
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) 
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) 
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) 
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) 
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) 
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) 
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363) 
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137) 
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:119) 
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42) 
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234) 
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144) 
Caused by: com.ibm.jbatch.container.exception.PersistenceException: java.sql.SQLException: java.lang.NullPointerException java.lang.NullPointerException 
    at com.ibm.jbatch.container.services.impl.JDBCPersistenceManagerImpl.createJobInstance(JDBCPersistenceManagerImpl.java:1682) 
    at com.ibm.jbatch.container.jobinstance.JobExecutionHelper.getNewJobInstance(JobExecutionHelper.java:89) 
    at com.ibm.jbatch.container.jobinstance.JobExecutionHelper.startJob(JobExecutionHelper.java:120) 
    at com.ibm.jbatch.container.impl.BatchKernelImpl.startJob(BatchKernelImpl.java:124) 
    at com.ibm.jbatch.container.api.impl.JobOperatorImpl.startInternal(JobOperatorImpl.java:123) 
    at com.ibm.jbatch.container.api.impl.JobOperatorImpl.start(JobOperatorImpl.java:88) 
    ... 28 more 
Caused by: java.sql.SQLException: java.lang.NullPointerException java.lang.NullPointerException 
    at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) 
    at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) 
    at org.hsqldb.jdbc.JDBCPreparedStatement.<init>(Unknown Source) 
    at org.hsqldb.jdbc.JDBCConnection.prepareStatement(Unknown Source) 
    at org.apache.commons.dbcp.DelegatingConnection.prepareStatement(DelegatingConnection.java:281) 
    at org.apache.commons.dbcp.DelegatingConnection.prepareStatement(DelegatingConnection.java:281) 
    at com.ibm.jbatch.container.services.impl.JDBCPersistenceManagerImpl.setSchemaOnConnection(JDBCPersistenceManagerImpl.java:396) 
    at com.ibm.jbatch.container.services.impl.JDBCPersistenceManagerImpl.getConnection(JDBCPersistenceManagerImpl.java:334) 
    at com.ibm.jbatch.container.services.impl.JDBCPersistenceManagerImpl.createJobInstance(JDBCPersistenceManagerImpl.java:1670) 
    ... 33 more 

Answer 1

이 준비된 명령문 결과의 편집 NullPointerExcepion HSQLDB 과 : 당신이없이 문으로 변경 그러나

Caused by: org.hsqldb.HsqlException: java.lang.NullPointerException 
    at org.hsqldb.error.Error.error(Unknown Source) 
    at org.hsqldb.result.Result.newErrorResult(Unknown Source) 
    at org.hsqldb.Session.execute(Unknown Source) 
    ... 41 more 
Caused by: java.lang.NullPointerException 
    at org.hsqldb.ParserCommand.compileSet(Unknown Source) 
    at org.hsqldb.ParserCommand.compilePart(Unknown Source) 
    at org.hsqldb.ParserCommand.compileStatement(Unknown Source) 
    at org.hsqldb.Session.compileStatement(Unknown Source) 
    at org.hsqldb.StatementManager.compile(Unknown Source) 
    ... 42 more 

, 자리 표시 자, 작동 방식 :

ps = connection.prepareStatement("SET SCHEMA "+schema); 
ps.execute();