从匿名pl/sql获取varchar数组时出现"ORA-03115:不支持的网络数据类型或表示"错误

Question

从匿名PL/SQL块中获取类型的varray时,我收到"ORA-03115:不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();
        }`

请帮我.先感谢您.

Answer 1

java.sql.SQLException:ORA-03115:不支持的网络数据类型或表示形式

这是由以下声明引起的:

cstmt.registerOutParameter(1, OracleTypes.ARRAY);

此语句表示数组将是输出,但未将实际的Oracle Type名称指定为第三个参数.您可以查看此Oracle Doc以获取更多相关信息.

我们可以java.sql.SQLException: ORA-03115: unsupported network datatype or representation通过在实际的Oracle Type名称中添加第三个参数来修复异常" ".在你的情况下它是NAMESARRAY.

cstmt.registerOutParameter(1, OracleTypes.ARRAY,"NAMESARRAY");

但是上面的语句在运行时会抛出以下异常:

java.sql.SQLException:无效的名称模式:SCOTT.NAMESARRAY

这是因为我们没有NAMESARRAY在DB中声明类型.上述异常将用户称为SCOTT,但您可以连接到您选择的用户并创建类型.

在DB中创建类型:

connect scott/tiger
CREATE OR REPLACE TYPE namesarray AS VARRAY(5) OF VARCHAR2(10) ;
/

一旦我们创建了类型NAMESARRAY,如果我们执行您的代码而不更改,我们将遇到以下错误:

java.sql.SQLException:ORA-06550:第1行,第180列:

PLS-00382:表达式类型错误ORA-06550:第1行第173列:

PL/SQL:语句被忽略

此错误是因为我们已在用户级别定义了类型,但我们尝试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;";

所以,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删除它,我们应该能够看到以下输出:

Kavita
Pritam
Ayan
Rishav
Aziz

以下是更新的计划:

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();}
    }
}