我在从匿名 PL/SQL block 中获取类型的 varray 时收到“ORA-03115:不受支持的网络数据类型或表示”异常。
我的代码是:
Connection con = null;
CallableStatement cstmt = null;
ResultSet rs = null;
String dequeueQuery = "DECLARE " +
" type namesarray IS VARRAY(5) OF VARCHAR2(10); " +
" names namesarray;" +
" total integer;" +
" BEGIN " +
" names := namesarray('Kavita', 'Pritam', 'Ayan', 'Rishav', 'Aziz'); " +
" ? := names;"+
" END;";
try{
con = getConnection();
con.setAutoCommit(false);
cstmt =(OracleCallableStatement )con.prepareCall(dequeueQuery);
cstmt.registerOutParameter(1, OracleTypes.ARRAY);
boolean b = cstmt.execute();
Array arr = cstmt.getArray(1);
String[] recievedArray = (String[]) arr.getArray();
for (int i = 0; i < recievedArray.length; i++)
System.out.println(recievedArray[i]);
con.commit();
}catch (Exception e) {
try {
con.rollback();
} catch (SQLException e1) {
e1.printStackTrace();
}`
请帮帮我。提前谢谢你。
最佳答案
java.sql.SQLException: ORA-03115: unsupported network datatype or representation
这是由以下语句引起的:
cstmt.registerOutParameter(1, OracleTypes.ARRAY);
此语句表示数组将作为输出,但没有将实际的 Oracle 类型名称指定为第三个参数。你可以查看这个Oracle Doc有关这方面的更多信息。
我们可以通过添加具有实际 Oracle 类型名称的第三个参数来修复异常“java.sql.SQLException: ORA-03115: unsupported network datatype or representation
”。在您的情况下,它是 NAMESARRAY
。
cstmt.registerOutParameter(1, OracleTypes.ARRAY,"NAMESARRAY");
但是上面的语句在运行时会抛出如下异常:
java.sql.SQLException: invalid name pattern: SCOTT.NAMESARRAY
这是因为我们还没有在 DB 中声明 NAMESARRAY
类型。上面的异常表明用户是 SCOTT,但您可以连接到您选择的用户并创建类型。
在数据库中创建类型:
connect scott/tiger
CREATE OR REPLACE TYPE namesarray AS VARRAY(5) OF VARCHAR2(10) ;
/
一旦我们创建了 NAMESARRAY
类型,如果我们在不更改的情况下执行您的代码,我们将遇到以下错误:
java.sql.SQLException: ORA-06550: line 1, column 180:
PLS-00382: expression is of wrong type ORA-06550: line 1, column 173:
PL/SQL: Statement ignored
此错误是因为我们已经在用户级别定义了类型,但我们试图在以下代码块中再次创建该类型:
String dequeueQuery = "DECLARE " +
" type namesarray IS VARRAY(5) OF VARCHAR2(10); " +
" names namesarray;" +
" total integer;" +
" BEGIN " +
" names := namesarray('Kavita', 'Pritam', 'Ayan', 'Rishav', 'Aziz'); " +
" ? := names;"+
" END;";
因此,我们需要从中删除类型声明。
String dequeueQuery = "DECLARE " +
" names namesarray;" +
" total integer;" +
" BEGIN " +
" names := namesarray('Kavita', 'Pritam', 'Ayan', 'Rishav', 'Aziz'); " +
" ? := names;"+
" END;";
如果我们在编译后执行程序,去掉它之后,我们应该能够看到如下输出:
Kavita
Pritam
Ayan
Rishav
Aziz
更新后的程序如下:
import java.io.*;
import java.sql.*;
import oracle.jdbc.*;
public class DBQC {
public static void main(String[] args) {
try {
Connection con=null;
Class.forName("oracle.jdbc.OracleDriver");
String connStr = "jdbc:oracle:thin:scott/tiger@//dbhost:1521/dbsrvc";
con=DriverManager.getConnection(connStr);
if(con != null)
{
System.out.println("Connection succeeded");
String dequeueQuery = "DECLARE " +
" names namesarray;" +
" total integer;" +
" BEGIN " +
" names := namesarray('Kavita', 'Pritam', 'Ayan', 'Rishav', 'Aziz'); " +
" ? := names;"+
" END;";
CallableStatement cstmt = null;
con.setAutoCommit(false);
cstmt =(OracleCallableStatement)con.prepareCall(dequeueQuery);
cstmt.registerOutParameter(1, OracleTypes.ARRAY,"NAMESARRAY");
boolean b = cstmt.execute();
Array arr = cstmt.getArray(1);
String[] recievedArray = (String[]) arr.getArray();
for (int i = 0; i < recievedArray.length; i++)
System.out.println(recievedArray[i]);
con.commit();
}
con.close();
} catch(Exception e){e.printStackTrace();}
}
}
关于java - 从匿名 pl/sql 获取 varchar 数组时出现 "ORA-03115: unsupported network datatype or representation"错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28579184/