将oracle对象类型传递给j​​ava存储过程

Question

是否可以将oracle对象类型传递给j​​ava存储过程。这是迄今为止我所拥有的。

Java存储过程：

create or replace and compile java source named Example as 
import java.sql.SQLData; 
import java.sql.SQLException; 
import java.sql.SQLInput; 
import java.sql.SQLOutput; 

public class Example { 

    public static void test(ExObj obj) { 
     System.out.println(obj.client); 
    } 

    public static class ExObj implements SQLData { 

     public String client = ""; 

     public String sql_type = "EXAMPLE_OBJECT"; 

     public ExObj(String client, String sql_type) { 
      this.client = client; 

      this.sql_type = sql_type; 
     } 

     /* IMPLEMENTS SQLData */ 

     public void setSqlType(String sqlType) { 
      sql_type = sqlType; 
     } 

     public void writeSQL(SQLOutput stream) throws SQLException { 
      stream.writeString(this.client); 
     } 

     public String getSQLTypeName() { 
      return sql_type; 
     } 

     public void readSQL(SQLInput stream, String sqlTypeName) throws SQLException { 
      sql_type = sqlTypeName; 

      this.client = stream.readString(); 
     } 

    } 
} 

Oracle过程：

CREATE OR REPLACE PROCEDURE example(ex_obj in example_object) 
AS LANGUAGE JAVA 
NAME 'Example.test(java.sql.Struct)'; 

甲骨文对象类型：

create or replace type example_object as object(
    client varchar2(40) 
) 

脚本调用过程：

declare 
    l_output DBMS_OUTPUT.chararr; 
    l_lines INTEGER := 1000; 

    l_obj example_object; 
begin 
    DBMS_OUTPUT.enable(1000000); 
    DBMS_JAVA.set_output(1000000); 

    l_obj := example_object('client'); 
    example(l_obj); 

    DBMS_OUTPUT.get_lines(l_output, l_lines); 

    FOR i IN 1 .. l_lines LOOP 
    -- Do something with the line. 
    -- Data in the collection - l_output(i) 
    DBMS_OUTPUT.put_line(l_output(i)); 
    END LOOP; 
end; 

当运行脚本我得到：

ORA-29531：类没有方法测试实施例

ORA-06512：在 “实施例”，第1行

ORA-06512：在线路17

我认为这是因为oracle object_type没有正确映射到java类。有没有办法做到这一点，如果是的话，我做错了什么？

Answer 1

下面提到的问题与您的代码可能是原因。

1）您必须声明object的type的变量，以便您可以使用它。您不能直接使用object作为datatype。请看下图：

演示：

create or replace type example_object as object(
    client varchar2(40) 
); 

/

--Created a type of the object 
create or replace type x is table of example_object; 

/


CREATE OR REPLACE PROCEDURE example(ex_obj in X) 
    AS 
    begin 

    DBMS_OUTPUT.put_line('Example.test(java.sql.Struct'); 
    DBMS_OUTPUT.put_line('Inside the Procedure'); 
    DBMS_OUTPUT.put_line (ex_obj(1).client); 

    end; 
/

    DECLARE 
     l_output DBMS_OUTPUT.chararr; 
     l_lines INTEGER := 1000; 

     l_obj  x := x();  

    BEGIN 
     DBMS_OUTPUT.enable (1000000); 
     --DBMS_JAVA.set_output (1000000); 

     --You need to mention the position where the record will be saved in table. 
     l_obj.extend(); 
     l_obj(1) := example_object('client1'); 

     example (l_obj); 

     DBMS_OUTPUT.put_line (l_obj(1).client); 

     DBMS_OUTPUT.get_lines (l_output, l_lines); 

     FOR i IN 1 .. l_lines 
     LOOP 
      -- Do something with the line. 
      -- Data in the collection - l_output(i) 
      DBMS_OUTPUT.put_line (l_output (i)); 
     END LOOP; 
    END; 

/