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比标准数据类型数组更复杂。换句话说,使用签名调用过程更容易:
(TABLE OF NUMBER, TABLE OF NUMBER, TABLE OF NUMBER)`
而不是签名为:
(TABLE OF (NUMBER, NUMBER, NUMBER)) <- your case
您可以在过程周围编写一个包装器,以将第二个事例转换为第一个事例。
话虽如此,到目前为止,绘制您的程序并非不可能。下面的例子很大程度上受到Tom Kyte的一篇文章的启发。Tom 描述了如何使用 映射 。在您的情况下,我们还必须使用来映射SQL对象。TABLE OF NUMBER
oracle.sql.ARRAY
oracle.sql.STRUCT
IDS
您可能还想浏览 Oracle JDBC 文档,特别是使用 Oracle 对象类型一章。
首先是类似于您的设置:
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过程:
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
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