“SQLException: ORA-06550” when calling PL/SQL function from Java

问题:

I want to use Java to retrieve data from database and display it, so I created this PL/SQL function, which returns a cursor:

create or replace function std_getInfoFunc return types.cursortype  as      my_cursor    types.cursorType;  begin      open my_cursor FOR     SELECT s.FirstName, s.LastName, s.Address, s.City, s.Province         , s.PostalCode, c.CourseName     FROM Students s, Courses c, StudentAndCourses cs     Where s.StudentID = cs.StudentID         AND c.CourseID = cs.CourseID;     Return my_cursor; end;  

In my Java code, I call the function as follows:

try{     CallableStatement cst=connection.prepareCall("{? = call std_getInfoFunc}");     cst.registerOutParameter(1, oracle.jdbc.OracleTypes.CURSOR);     cst.execute();      res=(ResultSet) cst.getObject(1);      while(res.next()){         System.out.println(res.getString(1));     } } catch(SQLException e){     e.printStackTrace(); } finally{     res.close();     cst.close();     conn.close(); } 

The code produces the following exception:

 run:   java.sql.SQLException: ORA-06550: line 1, column 13:    PLS-00905: object SAS.STD_GETINFOFUNC is invalid   ORA-06550: line 1, column 7:   PL/SQL: Statement ignored  at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:439) at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:395) at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:802) at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:436) at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:186) at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:521) at oracle.jdbc.driver.T4CCallableStatement.doOall8(T4CCallableStatement.java:202) at           oracle.jdbc.driver.T4CCallableStatement.executeForRows(T4CCallableStatement.java:1005) at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1307) at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3449) at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3550) at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:4710) at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:1374) at DBControler.viewStdInfo(DBControler.java:95) at Test_02.main(Test_02.java:18) 

Why?

回答1:

Possible causes of error are : (in the snippet - function)

1. The package "types" doesn't exists.

  create or replace package types      as          type cursorType is ref cursor;      end;      / 

2 Invalid SQL select statement (Table or column has been dropped or altered after creating the function).

You need to write a new function with simple sql statement and run it at Sql prompt and with Java code.

回答2:

Did the function get created without error? If the type or any tables are missing, the function will be created, but the body of the function will be invalid because it cannot be compiled.

If the function was created without error, and then an object upon which it depends is dropped or altered, the function will be marked invalid and may be recompiled, but then may fail if it cannot be compiled (missing table or column or whatever).

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