java - passing array in oracle stored procedure

Question

I have a Java app accessing an oracle stored procedure. The arguments to the stored procedure include an array type. I do it like the following...

con = this._getConnection();  
Connection narrowdConn = (Connection)WSJdbcUtil.getNativeConnection( (WSJdbcConnection)con );  

callable = con.prepareCall("{call MY_PKG.MY_PROCEDURE(?, ?)}");  


ArrayDescriptor arrayDescriptor = ArrayDescriptor.createDescriptor("VARCHAR2_ARR", narrowdConn);  
ARRAY arrayArg1 = new ARRAY(arrayDescriptor, con, docNames);  
ARRAY arrayArg2 = new ARRAY(arrayDescriptor, con, docTypes);  

callable.setArray(1, arrayArg1);  
callable.setArray(2, arrayArg2);  

callable.execute();  

Now, I am getting this Exception...

java.sql.SQLException: invalid name pattern: MY_PKG.VARCHAR2_ARR

VARCHAR2_ARR is a public TYPE, defined inside an Oracle Package like the following:

TYPE VARCHAR2_ARR IS TABLE OF VARCHAR2(50);

And used as such in my stored proc...

PROCEDURE MY_PROCEDURE  
    (V_ARR_ARG1  IN VARCHAR2_ARR,  
     V_ARR_ARG2  IN VARCHAR2_ARR)  

Answer 1

the type VARCHAR2_ARR is a PLSQL type, you won't be able to interface it directly from java. I suggest you look into this thread on AskTom regarding a similar question.

Here are a couple suggestions:

• create a SQL TYPE that you can bind from java
• insert into a temporary table from java and read from it in plsql

In both cases you will have to either modify the PLSQL procedure or add a new translation procedure.

Answer 2

我们需要在创建数据源时设置 accessToUnderlyingConnectionAllowed falg true

Answer 3

I did stuck at this problem. Hope this illustration might help you:

Steps to create the procedure in oracle.

• Create type of the desired object as:

CREATE OR REPLACE TYPE STUDENT_TYPE IS OBJECT
( ID NUMBER,
  NAME VARCHAR2(50));

• Create another object of array as:

CREATE OR REPLACE TYPE STUDENT_ARRAY IS TABLE OF STUDENT_TYPE;

• Create procedure to accepting array of object and do the desired operation, I am here just inserting the entries in table as:

CREATE OR REPLACE PROCEDURE SP_INSERT_STUDENT_RECORD_IN_BULK(
IN_STUDENT_RECORDS STUDENT_ARRAY) IS
BEGIN 
  FOR i IN IN_STUDENT_RECORDS.first.. IN_STUDENT_RECORDS.last
   LOOP
    BEGIN 
      INSERT INTO STUDENT(ID,NAME) VALUES
      (IN_STUDENT_RECORDS(i).ID, IN_STUDENT_RECORDS(i).NAME)
    END;
   END LOOP:
END SP_INSERT_STUDENT_RECORD_IN_BULK;

Code snippet to call Procedure through Java

import org.springframework.jdbc.core.*;
import oracle.jdbc.OracleConnection;
....
List<Student> students = getStudentList();
try(Connection hikariCon = dataSource.getConnection()){
    if(hikariCon.isWrapperFor(OracleConnection.class)){
        OracleConnection con = hikariCon.unwrap(OracleConnection.class);
        Object[] students = students.stream().map(student -> {
            return con.createStruct(STUDENT_TYPE, new Object[]{
                student.getId(),
                student.getName()
            });
        }).collect(Collectors.list()).flatMap(List::stream).toArray();
        
        SimpleJdbcCall jdbcCall = new SimpleJdbcCall(dataSource)
                                .withProcedureName("SP_INSERT_STUDENT_RECORD_IN_BULK")
                                .declareParameters(
                                new SqlParameter("IN_STUDENT_RECORDS", Types.ARRAY));
        jdbcCall.execute(con.createOracleArray(STUDENT_ARRAY,students))
    }
} catch(Exception e){
    log.error("Error due to- {}",e,getMessage());
}