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存储过程

create or replace procedure my_procedure
is
cursor c_emp is select * from employees;
r_name c_emp%rowtype;
begin
open c_emp;
loop
fetch c_emp into r_name;
DBMS_OUTPUT.PUT_LINE(r_name.EMP_NAME);
EXIT WHEN c_emp%NOTFOUND;
END LOOP;
close c_emp;
END;

JDBC 代码

stmt=conn.prepareCall("{call my_procedure}");

      stmt.registerOutParameter(1, java.sql.Types.VARCHAR);
      ResultSet rs = stmt.executeQuery();
      while(rs.next()) {
            System.out.println( rs.getString(1));
        }

它显示错误，例如

错误：

java.sql.SQLException: Invalid column index
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:113)
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:147)
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:209)
    at oracle.jdbc.driver.OracleCallableStatement.registerOutParameterInternal(OracleCallableStatement.java:122)
    at oracle.jdbc.driver.OracleCallableStatement.registerOutParameter(OracleCallableStatement.java:285)
    at oracle.jdbc.driver.OracleCallableStatement.registerOutParameter(OracleCallableStatement.java:371)
    at table.callstmt_storedprcd.main(callstmt_storedprcd.java:27)

我不知道为什么它会显示这样的错误。请纠正我的错误。

4

1 回答 1

1

DBMS_OUTPUT 用于向屏幕显示消息。它不是 OUT 参数。

您的过程没有参数。因此，这将破坏您的程序：

  stmt.registerOutParameter(1, java.sql.Types.VARCHAR);
于 2013-10-12T10:50:24.550 回答