从 java 调用程序 用 oracle 数据库

Question

Hello to All stackOverflow goodfellas, I'm so noob in The Procedures with oracle database 21c enterprise edition, As my past background always works with Direct jdbc but now I need to write program with Procedures that call and every time I need to change some Algorithm to call data from database don't change the main code form java. as you know if I do, need compile, build and deploy to server get more time, so going to straight problem view:(I'm not sure is good way or we have better way) I have two table Like :

CREATE TABLE C##CREATOR.USERS 
(
  ID NUMBER(11, 0) NOT NULL 
, USERNAME VARCHAR2(20 CHAR) NOT NULL 
, DATECREATION TIMESTAMP(6) DEFAULT CURRENT_TIMESTAMP NOT NULL 
, CONSTRAINT USERS_PK PRIMARY KEY 
  (
    ID 
  )
  DEFERRABLE INITIALLY IMMEDIATE
  USING INDEX 
  (
      CREATE INDEX C##CREATOR.USERS_PK ON C##CREATOR.USERS (ID ASC) 
      LOGGING 
      TABLESPACE DPS_PERMANENT 
      PCTFREE 10 
      INITRANS 2 
      STORAGE 
      ( 
        INITIAL 65536 
        NEXT 1048576 
        MINEXTENTS 1 
        MAXEXTENTS UNLIMITED 
        BUFFER_POOL DEFAULT 
      ) 
      NOPARALLEL 
  )
  ENABLE 
) 
LOGGING 
TABLESPACE DPS_PERMANENT 
PCTFREE 10 
INITRANS 1 
STORAGE 
( 
  INITIAL 65536 
  NEXT 1048576 
  MINEXTENTS 1 
  MAXEXTENTS UNLIMITED 
  BUFFER_POOL DEFAULT 
) 
NOCOMPRESS 
NO INMEMORY 
NOPARALLEL;

And:

CREATE TABLE C##CREATOR.USERPASSWORDS 
(
  ID NUMBER(11, 0) NOT NULL 
, USERID NUMBER(11, 0) NOT NULL 
, PASSWORD VARCHAR2(20 BYTE) NOT NULL 
, DATECREATION TIMESTAMP(6) DEFAULT CURRENT_TIMESTAMP NOT NULL 
, CONSTRAINT USERPASSWORDS_PK PRIMARY KEY 
  (
    ID 
  )
  USING INDEX 
  (
      CREATE UNIQUE INDEX C##CREATOR.USERPASSWORDS_PK ON C##CREATOR.USERPASSWORDS (ID ASC) 
      LOGGING 
      TABLESPACE DPS_PERMANENT 
      PCTFREE 10 
      INITRANS 2 
      STORAGE 
      ( 
        INITIAL 65536 
        NEXT 1048576 
        MINEXTENTS 1 
        MAXEXTENTS UNLIMITED 
        BUFFER_POOL DEFAULT 
      ) 
      NOPARALLEL 
  )
  ENABLE 
) 
LOGGING 
TABLESPACE DPS_PERMANENT 
PCTFREE 10 
INITRANS 1 
STORAGE 
( 
  INITIAL 65536 
  NEXT 1048576 
  MINEXTENTS 1 
  MAXEXTENTS UNLIMITED 
  BUFFER_POOL DEFAULT 
) 
NOCOMPRESS 
NO INMEMORY 
NOPARALLEL;

As other side In Procedures:

CREATE OR REPLACE PROCEDURE SYSTEM_LOGIN_GET_USER_WITH_PASSWORD 
( 
INP_USERNAME IN VARCHAR2
, user_cursor OUT SYS_REFCURSOR 
) AS 
BEGIN 
    OPEN user_cursor FOR
        SELECT USERS.USERNAME , USERS.ID , USERPASSWORDS.PASSWORD FROM USERS 
        LEFT OUTER JOIN USERPASSWORDS 
        ON USERS.ID = USERPASSWORDS.USERID WHERE
        USERS.USERNAME = INP_USERNAME ORDER BY USERPASSWORDS.DATECREATION DESC
        FETCH FIRST 1 ROWS ONLY;
END SYSTEM_LOGIN_GET_USER_WITH_PASSWORD;

If Calling from Java with:

package mehritco.ir.megnatis.dps.repository;

import mehritco.ir.megnatis.dps.repository.rdbms.oracle.OracleConnection;
import mehritco.ir.megnatis.users.User;
import oracle.jdbc.OracleCallableStatement;
import oracle.jdbc.OracleTypes;

import java.sql.*;

public class RepoUsers {

    public User get(User userToFind){
        try {
            Connection oracleConnection = OracleConnection.getPoolConnection().getConnection();
            String queryToGetUser ="{ execute SYSTEM_LOGIN_GET_USER_WITH_PASSWORD(?,?) }";
            CallableStatement callableStatement = oracleConnection.prepareCall(queryToGetUser);
            callableStatement.setString(1,userToFind.getUsername());
            callableStatement.registerOutParameter(2, OracleTypes.CURSOR);
            callableStatement.execute();
            ResultSet resultSet = ((OracleCallableStatement)callableStatement).getCursor(2);
            while (resultSet.next()) {
                for(int i=1;i<=resultSet.getMetaData().getColumnCount();i++){
                    System.out.println(resultSet.getString(i));
                }
            }
            return null;//for test
        }catch (SQLException sqlException){
            sqlException.printStackTrace();
            System.out.println(sqlException.getMessage());
            return null;
        }
    }


}

I got error:

java.sql.SQLException: Non supported SQL92 token at position: 3

Answer 1

I found my Mistake around:

{ execute SYSTEM_LOGIN_GET_USER_WITH_PASSWORD(?,?) }

and when changed to 'call' works.

{ call SYSTEM_LOGIN_GET_USER_WITH_PASSWORD(?,?) }