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ORACLE存儲過程的數(shù)組參數(shù)

ORACLE存儲過程的數(shù)組參數(shù)

http://www.examw.com/biancheng/oracle/158294/

環(huán)境:Eclipse+Oracle9.0.2+Tomcat5.5

功能:采用存儲過程、type組合來實現(xiàn)批量入庫,以節(jié)省系統(tǒng)開銷,提高效率。

*

sql腳本+測試代碼:

* 1)create or replace type t_cableLine_point as object

ID NUMBER(10),

CABLELINEID NUMBER(10),

ROADPOINTID NUMBER(10),

ORDERNUM NUMBER(10),

REMARK NUMBER(10)

* 2)CREATE OR REPLACE TYPE ARRAY_cableLine_point AS table OF t_cableLine_point

* 3)create table RSC_CABLELINE_POINT

ID NUMBER(10) not null,

CABLELINEID NUMBER(10) not null,

ROADPOINTID NUMBER(10) not null,

ORDERNUM NUMBER(10),

REMARK NUMBER(10)

* 4)create or replace procedure batch_cableline_point(i_object in ARRAY_cableLine_point) is

begin

insert into RSC_CABLELINE_POINT

(ID, CABLELINEID, ROADPOINTID, ORDERNUM, REMARK)

select ID, CABLELINEID, ROADPOINTID, ORDERNUM, REMARK

from the (select cast(i_object as ARRAY_cableLine_point) from dual);

end batch_cableline_point;

* 5)測試代碼:

package com.nilpower.test;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

public class Test {

public static void main(String[] args) {

try {

Class.forName(“oracle.jdbc.driver.OracleDriver”);

String url = “jdbc:oracle:thin:@127.0.0.1:1521:nilpower”;

Connection con = DriverManager.getConnection(url, “scott”, “tiger”);

PreparedStatement pstmt = null;

String sql = “{call batch_cableline_point(?)}”;

pstmt = con.prepareCall(sql);

Object[][] object1 = new Object[10][5];

int max = 3615142;// 由于表有索引

for (int i = 0; i 《 10; i++) {

object1[i][0] = ++max;

object1[i][1] = 158870593;

object1[i][2] = 333;

object1[i][3] = 444;

object1[i][4] = 555;

}

oracle.sql.ArrayDescriptor desc = oracle.sql.ArrayDescriptor

.createDescriptor(“ARRAY_CABLELINE_POINT”, con);

oracle.sql.ARRAY array = new oracle.sql.ARRAY(desc, con, object1);

pstmt.setArray(1, array);

pstmt.executeUpdate();

} catch (Exception e) {

e.printStackTrace();

}

}

}

備注:如果在入庫的過程中發(fā)現(xiàn)字符串的值沒有入進去,請檢查有沒有加載該類庫nls_charset12.jar

* 該文章是參考“風(fēng)雪”文章后個人試驗的存檔。

*

* 其他參考:(引用2008-5-24 04:49 Aowken)

* Tomcat+Oracle調(diào)用存儲過程郁悶之旅

今天在改公司管理系統(tǒng)的時候,因為某個功能需要使用數(shù)組類型作為IN參數(shù)調(diào)用存儲過程,看了看文檔發(fā)現(xiàn)有Varray、nested table,但Varray有個最多數(shù)量的限制,也只好用nested table了,于是引發(fā)一連串的問題。

環(huán)境:

java version “1.6.0_05”

Java(TM) SE Runtime Environment (build 1.6.0_05-b13)

Java HotSpot(TM) Client VM (build 10.0-b19, mixed mode, sharing)

apache-tomcat-6.0.16

Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production

PL/SQL Release 9.2.0.1.0 - Production

CORE 9.2.0.1.0 Production

TNS for 32-bit Windows: Version 9.2.0.1.0 - Production

NLSRTL Version 9.2.0.1.0 - Production

本來對Java這種據(jù)說很先進的東西就懵懵懂懂,索性就真的以為他非常牛X。使用幾維數(shù)組作為參數(shù)調(diào)用存儲過程還不是跟Set個String一樣那么簡單,但其實我錯了,所以我也對java很失望,他遠不如想象中那么XX。

Object arrInt[] = {0,1,2,3,4,5,6};

callStmt.SetObject(1, arrInt, Types.ARRAY);

要是想像上面這樣操作他就會拋個java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to oracle.sql.ARRAY,于是我知道java他不會自己轉(zhuǎn),非得人工干預(yù)。但我突然發(fā)現(xiàn)自己很愚蠢,我都沒告訴他procedure參數(shù)的類型,即使可以轉(zhuǎn)過去又有個P用,百度了一下才知道得用下面的法子。

import oracle.sql.ARRAY;

import oracle.sql.ArrayDescriptor;

Connnection conn = DBConnManager.getConnection();

callStmt = conn.prepareCall(sql);

ArrayDescriptor arrDesc = ArrayDescriptor.createDescriptor(“dbms_sql.Varchar2_Table”, conn);

ARRAY arr = new ARRAY(arrDesc, conn, arrInt);

執(zhí)行一下,結(jié)果異常。我靠數(shù)據(jù)庫里能用dbms_sql.Varchar2_Table聲明,他居然 java.sql.SQLException: 無效的名稱模式: DBMS_SQL.VARCHAR2_TABLE。我心想是不是得寫成SYS.dbms_sql.Varchar2_Table,結(jié)果還是一樣。再百度,人們說這樣不行,原因。。.不知道,但必須得自己定義類型才可以。于是我不得不

create type numbertable as table of number;

ArrayDescriptor arrDesc = ArrayDescriptor.createDescriptor(“numbertable”, conn);

ARRAY arr = new ARRAY(arrDesc, conn, arrInt);

結(jié)果又來了個java.sql.SQLException: 無效的名稱模式: baby.numbertable。我無語還得百度!@#¥%.。。.N久無果!但我發(fā)別人的碼的代碼里這個類型都是大寫,于是我也寫成 NUMBERTABLE。哈哈,果然不出那個異常了。但他NND又蹦個java.lang.ClassCastException: org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper cannot be cast to oracle.jdbc.OracleConnection出來。這下郁悶了,莫非從DBCP拿出來的Connection跟 OracleConnection不一樣。暈了,別介呀,我對java不懂!又search了半天,發(fā)現(xiàn)了一個UnWrapper,本以為能把這個 Wrapper給干掉的,但搞了半天沒搞明白。過了XX時間,不知道是在哪國網(wǎng)站上看到有人

ArrayDescriptor arrDesc = ArrayDescriptor.createDescriptor(“NUMBERTABLE”, ((DelegatingConnection)conn).getDelegate()));

他們用著都好用,到我這((DelegatingConnection)conn).getDelegate()出來的Connection是個null,很郁悶。后來又看到

public static Connection getNativeConnection(Connection con) throws SQLException {

if (con instanceof DelegatingConnection) {

Connection nativeCon = ((DelegatingConnection) con).getInnermostDelegate();

// For some reason, the innermost delegate can be null: not for a

// Statement‘s Connection but for the Connection handle returned by the pool.

// We’ll fall back to the MetaData‘s Connection in this case, which is

// a native unwrapped Connection with Commons DBCP 1.1.

return (nativeCon != null ? nativeCon : con.getMetaData().getConnection());

}

return con;

}

可((DelegatingConnection) con).getInnermostDelegate();依然是null但con.getMetaData().getConnection());得到了一個OracleConnection,debug時看著eclipse variables的窗口心中一陣暗喜,該OK了吧!

哎,事實上最近一段時間總是事與愿違,執(zhí)行-又異常了!郁悶,一次比一次郁悶,一次比一次怪異!

java.lang.ClassCastException: oracle.jdbc.driver.OracleConnection cannot be cast to oracle.jdbc.OracleConnection 由于字符串太長搜都搜不到,想了好久,嘗試著各種各樣的方法!終于有一個次把tomcat/lib目錄classes12.jar刪掉,沒有異常,一切 OK!但后來把classes12.jar又仍進去了,還正常的,代碼沒有一點變化!很是郁悶,但既然問題沒了,也就懶得看了!

最后的代碼:

-----------------------------------------------------------------------------------

public static Connection getConnection() {

Connection con = null;

try {

Context ic = new InitialContext();

DataSource ds = (DataSource) ic.lookup(“java:comp/env/jdbc/yoyo”);

con = ds.getConnection();

} catch (Exception e) {

System.out.println(“**** error DataSource”);

}

return con;

}

-----------------------------------------------------------------------------------

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.CallableStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Types;

import java.util.ArrayList;

import oracle.sql.ARRAY;

import oracle.sql.ArrayDescriptor;

import org.apache.tomcat.dbcp.dbcp.DelegatingConnection;

public class BussinessLog {

public static ArrayList CancelLog(String sLoginUser, Object[] arrLogID)

{

ArrayList arrList = new ArrayList();

Connection conn = null;

CallableStatement callStmt = null;

String sql = null;

ArrayDescriptor arrDesc = null;

try

{

conn = DbConnectionManager.getConnection();

sql = “{call P_CanceltLog(?,?,?,?)}”;

callStmt = conn.prepareCall(sql);

arrDesc = ArrayDescriptor.createDescriptor(“NUMBERTABLE”, getNativeConnection(conn));

ARRAY arr = new ARRAY(arrDesc, getNativeConnection(conn), arrLogID);

callStmt.setString(1, sLoginUser);

callStmt.setObject(2, arr, Types.ARRAY);

callStmt.registerOutParameter(3, Types.VARCHAR);

callStmt.registerOutParameter(4, Types.INTEGER);

callStmt.execute();

arrList.add(callStmt.getInt(4));

arrList.add(callStmt.getString(3));

return arrList;

} catch (Exception e) {

System.out.println(e.toString());

} finally {

DbAction.clear(conn, callStmt);

}

return arrList;

}

public static Connection getNativeConnection(Connection con) throws SQLException {

if (con instanceof DelegatingConnection) {

Connection nativeCon = ((DelegatingConnection) con).getInnermostDelegate();

// For some reason, the innermost delegate can be null: not for a

// Statement’s Connection but for the Connection handle returned by the pool.

// We‘ll fall back to the MetaData’s Connection in this case, which is

// a native unwrapped Connection with Commons DBCP 1.1.

return (nativeCon != null ? nativeCon : con.getMetaData().getConnection());

}

return con;

}

}

-----------------------------------------------------------------------------------

A. 在這之前我還下載了最新的commons-dbcp-1.2.2.jar,但使用里面DelegatingConnection時,con instanceof DelegatingConnection是false,看來tomcat里出來的Connection就的配Tomcat\lib\tomcat- dbcp.jar里的DelegatingConnection,還真是什么槍打什么鳥。

B.偶爾發(fā)現(xiàn) ((DelegatingConnection) con).getInnermostDelegate();之所以返回null是因為tomcat里Context.Resource的 accessToUnderlyingConnectionAllowed參數(shù)默認為false所致,被設(shè)置成true之后是可以取到 OracleConnection的.

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