dbutils 无法绑定由多个部分组成的标识符

[昆卡卡]

这个是SQL语句 public static final String SEARCH_REAMING_ELEC = "SELECT TOP 10 d.ELEC2-d.ELEC1 as reaming FROM DAYRECORD d,ROOMINFO r WHERE r.MIDID = d.MIDID AND r.PORTNO+1 = d.PORTNO AND r.ROOMID = ? ORDER BY d.RDATE DESC";
如题：执行这段代码的时候报错：List results = r.query(Manager.SEARCH_REAMING_ELEC,new MapListHandler(),roomId);
roomId是页面传过来的变量，
2012-01-04 13:46:14,934 [DEBUG] com.mchange.v2.c3p0.impl.NewPooledConnection:430 - com.mchange.v2.c3p0.impl.NewPooledConnection@150152f handling a throwable.
com.microsoft.sqlserver.jdbc.SQLServerException: com.microsoft.sqlserver.jdbc.SQLServerException: 无法绑定由多个部分组成的标识符 "r.MIDID"。
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:171)
at com.microsoft.sqlserver.jdbc.SQLServerParameterMetaData.<init>(SQLServerParameterMetaData.java:426)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.getParameterMetaData(SQLServerPreparedStatement.java:1510)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.getParameterMetaData(NewProxyPreparedStatement.java:573)
at org.apache.commons.dbutils.QueryRunner.fillStatement(QueryRunner.java:176)
at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:394)
at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:488)
at com.cgdz.simsfr.web.LoginServlet.doPost(LoginServlet.java:111)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
2012-01-04 13:46:14,948 [DEBUG] com.mchange.v2.sql.SqlUtils: 85 - Attempted to convert SQLException to SQLException. Leaving it alone. [SQLState: null; errorCode: 0]
com.microsoft.sqlserver.jdbc.SQLServerException: com.microsoft.sqlserver.jdbc.SQLServerException: 无法绑定由多个部分组成的标识符 "r.MIDID"。
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:171)
at com.microsoft.sqlserver.jdbc.SQLServerParameterMetaData.<init>(SQLServerParameterMetaData.java:426)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.getParameterMetaData(SQLServerPreparedStatement.java:1510)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.getParameterMetaData(NewProxyPreparedStatement.java:573)
at org.apache.commons.dbutils.QueryRunner.fillStatement(QueryRunner.java:176)
at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:394)
at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:488)
at com.cgdz.simsfr.web.LoginServlet.doPost(LoginServlet.java:111)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
2012-01-04 13:46:14,953 [DEBUG] com.mchange.v2.c3p0.impl.DefaultConnectionTester:126 - Testing a Connection in response to an Exception:
com.microsoft.sqlserver.jdbc.SQLServerException: com.microsoft.sqlserver.jdbc.SQLServerException: 无法绑定由多个部分组成的标识符 "r.MIDID"。
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:171)
at com.microsoft.sqlserver.jdbc.SQLServerParameterMetaData.<init>(SQLServerParameterMetaData.java:426)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.getParameterMetaData(SQLServerPreparedStatement.java:1510)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.getParameterMetaData(NewProxyPreparedStatement.java:573)
at org.apache.commons.dbutils.QueryRunner.fillStatement(QueryRunner.java:176)
at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:394)
at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:488)
at com.cgdz.simsfr.web.LoginServlet.doPost(LoginServlet.java:111)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
求大神解答啊，我的SQL语句直接放在数据库是可以执行的啊，为什么已用dbutils就会出这个错的，求解释