如何在java中调用包含用户定义类型的oracle存储过程? [英] How to call oracle stored procedure which include user-defined type in java?
问题描述
我有以下存储过程:
procedure getInfo ( p_ids IN IDS_TABLE, p_details OUT cursor )
类型 IDS_TABLE 是:
create or replace type IDS_TABLE as table of IDS
create or replace type IDS as object ( id1 NUMBER, id2 NUMBER, id3 NUMBER )
如何在 Java 中调用 getInfo?
How can I call getInfo in Java?
推荐答案
手动设置 Oracle SQL 对象和 java 对象之间的链接并非易事.特别是，用户定义对象的数组(或嵌套表)从 java 传递到 Oracle 比标准数据类型的数组更复杂.换句话说，调用带有签名的过程更容易:
Setting up a link between Oracle SQL objects and java objects manually is not a trivial task. In particular, arrays (or nested tables) of user-defined objects are more complex to pass from java to Oracle than arrays of standard datatypes. In other words, it is easier to call a procedure with signature:
(TABLE OF NUMBER, TABLE OF NUMBER, TABLE OF NUMBER)`
比签名为:
(TABLE OF (NUMBER, NUMBER, NUMBER)) <- your case
您可以为您的过程编写一个包装器，将第二种情况转换为第一种情况.
You can write a wrapper around your procedure to transform the second case into the first case.
话虽如此，但到目前为止，映射您的过程并非不可能.下面的例子是 主要受 Tom Kyte 的帖子的启发.Tom 描述了如何使用 oracle.sql.ARRAY 映射 TABLE OF NUMBER.在您的情况下，我们还必须使用 oracle.sql.STRUCT 来映射 IDS SQL 对象.
That being said, it is by far not impossible to map your procedure. The following example is largely inspired by a post by Tom Kyte. Tom describes how to map a TABLE OF NUMBER using oracle.sql.ARRAY. In your case we will also have to use oracle.sql.STRUCT to map the IDS SQL object.
您可能还想浏览 Oracle JDBC 文档，特别是 使用 Oracle 对象类型.
You may also want to browse the Oracle JDBC doc, in particular the chapter Working with Oracle Object Types.
首先是与您类似的设置:
First is a setup similar to yours:
SQL> CREATE OR REPLACE TYPE IDS AS OBJECT ( id1 NUMBER, id2 NUMBER, id3 NUMBER );
2 /
Type created
SQL> CREATE OR REPLACE TYPE IDS_TABLE AS TABLE OF IDS;
2 /
Type created
SQL> CREATE OR REPLACE PROCEDURE getInfo(p_ids IN IDS_TABLE) IS
2 BEGIN
3 FOR i IN 1 .. p_ids.COUNT LOOP
4 dbms_output.put_line(p_ids(i).id1
5 || ',' || p_ids(i).id2
6 || ',' || p_ids(i).id3);
7 END LOOP;
8 END getInfo;
9 /
Procedure created
这是java程序:
SQL> CREATE OR REPLACE
2 AND COMPILE JAVA SOURCE NAMED "ArrayDemo"
3 as
4 import java.io.*;
5 import java.sql.*;
6 import oracle.sql.*;
7 import oracle.jdbc.driver.*;
8
9 public class ArrayDemo {
10
11 public static void passArray() throws SQLException {
12
13 Connection conn =
14 new OracleDriver().defaultConnection();
15
16
17 StructDescriptor itemDescriptor =
18 StructDescriptor.createDescriptor("IDS",conn);
19
20 Object[] itemAtributes = new Object[] {new Integer(1),
21 new Integer(2),
22 new Integer(3)};
23 STRUCT itemObject1 = new STRUCT(itemDescriptor,conn,itemAtributes);
24
25 itemAtributes = new Object[] {new Integer(4),
26 new Integer(5),
27 new Integer(6)};
28 STRUCT itemObject2 = new STRUCT(itemDescriptor,conn,itemAtributes);
29
30 STRUCT[] idsArray = {itemObject1,itemObject2};
31
32 ArrayDescriptor descriptor =
33 ArrayDescriptor.createDescriptor( "IDS_TABLE", conn );
34
35 ARRAY array_to_pass =
36 new ARRAY( descriptor, conn, idsArray );
37
38 OraclePreparedStatement ps =
39 (OraclePreparedStatement)conn.prepareStatement
40 ( "begin getInfo(:x); end;" );
41
42 ps.setARRAY( 1, array_to_pass );
43 ps.execute();
44
45 }
46 }
47 /
Java created
让我们称之为:
SQL> CREATE OR REPLACE
2 PROCEDURE show_java_calling_plsql
3 AS LANGUAGE JAVA
4 NAME 'ArrayDemo.passArray()';
5 /
Procedure created
SQL> exec show_java_calling_plsql ;
1,2,3
4,5,6
PL/SQL procedure successfully completed
这篇关于如何在java中调用包含用户定义类型的oracle存储过程?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
