1.模拟带有identity表

[db2inst1@xifenfei ~]$ db2 "create table t_xff(xid smallint not null generated always as identity 
> (start with 1,increment by 1),x_name varchar(200)) in ts_xifenfei"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "insert into t_xff(x_name) values('www.orasos.com')"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "insert into t_xff(x_name) values('XIFENFEI')"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "insert into t_xff(x_name) values('xifenfei')"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 "select * from t_ff"
SQL0204N  "DB2INST1.T_FF" is an undefined name.  SQLSTATE=42704
[db2inst1@xifenfei ~]$ db2 "select * from t_xff"

XID    X_NAME           
------ -------------
     1 www.orasos.com 
     2 XIFENFEI         
     3 xifenfei         

  3 record(s) selected.

2.导出表结构

[db2inst1@xifenfei ~]$ mkdir move_s
[db2inst1@xifenfei ~]$ cd move_s/
[db2inst1@xifenfei move_s]$ db2look -d sample -e -l -o db2_sample.ddl
-- No userid was specified, db2look tries to use Environment variable USER
-- USER is: DB2INST1
-- Creating DDL for table(s)
-- Output is sent to file: db2_sample.ddl

3.导出数据

[db2inst1@xifenfei move_s]$ db2move sample export

Application code page not determined, using ANSI codepage 1208

*****  DB2MOVE  *****

Action:  EXPORT

Start time:  Thu Apr  5 20:21:28 2012


Connecting to database SAMPLE ... successful!  Server : DB2 Common Server V9.5.9

Binding package automatically ... /home/db2inst1/sqllib/bnd/db2common.bnd ... successful!

Binding package automatically ... /home/db2inst1/sqllib/bnd/db2move.bnd ... successful!

EXPORT:     18 rows from table "DB2INST1"."ACT"
EXPORT:      5 rows from table "DB2INST1"."CL_SCHED"
EXPORT:     14 rows from table "DB2INST1"."DEPARTMENT"
EXPORT:     42 rows from table "DB2INST1"."EMPLOYEE"
EXPORT:  10000 rows from table "DB2INST1"."EMPMDC"
EXPORT:     73 rows from table "DB2INST1"."EMPPROJACT"
EXPORT:      8 rows from table "DB2INST1"."EMP_PHOTO"
EXPORT:      8 rows from table "DB2INST1"."EMP_RESUME"
EXPORT:    145 rows from table "SYSTOOLS"."HMON_ATM_INFO"
EXPORT:      0 rows from table "SYSTOOLS"."HMON_COLLECTION"
EXPORT:      3 rows from table "DB2INST1"."IN_TRAY"
EXPORT:      8 rows from table "DB2INST1"."ORG"
EXPORT:      5 rows from table "SYSTOOLS"."POLICY"
EXPORT:     65 rows from table "DB2INST1"."PROJACT"
EXPORT:     20 rows from table "DB2INST1"."PROJECT"
EXPORT:     41 rows from table "DB2INST1"."SALES"
EXPORT:     35 rows from table "DB2INST1"."STAFF"
EXPORT:     35 rows from table "DB2INST1"."STAFFG"
EXPORT:      3 rows from table "DB2INST1"."T_XFF"

Disconnecting from database ... successful!

End time:  Thu Apr  5 20:21:32 2012

4.目标端创建数据库

C:\Windows\system32>db2 "create db db_XFF pagesize 8 k"
DB20000I  CREATE DATABASE命令成功完成。

5.目标端创建对象

C:\Windows\system32>DB2 -tvf D:\move_s\db2_sample.ddl -l d:\xifenfei.log

--检查xifenfei.log文件,发现错误,手工修复

6.导入数据文件

D:\move_s>db2move db_xff load

*****  DB2MOVE  *****

Action:  LOAD

Start time:  Sun Apr 15 23:00:17 2012


Connecting to database DB_XFF ... successful!  Server : DB2 Common Server V9.5.0

Binding package automatically ... E:\DB2\9.5\SQLLIB\BND\DB2COMMON.BND ... successful!

Binding package automatically ... E:\DB2\9.5\SQLLIB\BND\DB2MOVE.BND ... successful!

* LOAD:  table "DB2INST1"."ACT"                
  -Rows read:         18
  -Loaded:            18
  -Rejected:           0
  -Deleted:            0
  -Committed:         18

* LOAD:  table "DB2INST1"."CL_SCHED"           
  -Rows read:          5
  -Loaded:             5
  -Rejected:           0
  -Deleted:            0
  -Committed:          5

--中间很多记录省略

--发现identity表导入失败，需要手工处理
* LOAD:  table "DB2INST1"."T_XFF"              
***  WARNING 3107.  Check message file tab19.msg!
***  SQL Warning!  SQLCODE is  3107
***  SQL3107W  消息文件中至少有一条警告消息。


  -Rows read:          3
  -Loaded:             0
  -Rejected:           3
  -Deleted:            0
  -Committed:          3


Disconnecting from database ... successful!

End time:  Sun Apr 15 23:00:26 2012

7.重新导入identity表

D:\move_s>db2 connect to db_xff

   数据库连接信息

 数据库服务器         = DB2/NT 9.5.0
 SQL 授权标识         = XIFENFEI
 本地数据库别名       = DB_XFF
D:\move_s>DB2 "load from tab19.ixf of ixf modified by identityoverride insert into db2inst1.t_xff"
SQL3501W  由于禁用数据库正向恢复，因此表所驻留的表空间将不被置于备份暂挂状态。

SQL3551W  表至少包含实用程序将覆盖的一个 GENERATED ALWAYS 列。

SQL3109N  实用程序正在开始从文件 "D:\move_s\tab19.ixf" 装入数据。

SQL3500W  在时间 "2012-04-15 23:06:52.393775"，实用程序在开始 "LOAD"。

SQL3150N  PC/IXF 文件中的 H 记录具有产品 "DB2    02.00"，日期 "20120405"和时间 "202132"。

SQL3153N  PC/IXF 文件中的 T 记录具有名称 "tab19.ixf"，限定符 "" 和源 ""。

SQL3519W  开始装入一致点。输入记录数 = "0"。

SQL3520W  “装入一致点”成功。

SQL3110N  实用程序已完成处理。从输入文件读了 "3" 行。

SQL3519W  开始装入一致点。输入记录数 = "3"。

SQL3520W  “装入一致点”成功。

SQL3515W  在时间 "2012-04-15 23:06:52.451619"，实用程序已经完成了 "LOAD"。


读取行数         = 3
跳过行数         = 0
装入行数         = 3
拒绝行数         = 0
删除行数         = 0
落实行数         = 3

D:\move_s>db2 "select * from db2inst1.t_xff"

XID    X_NAME


------ ------------------------------
     1 www.orasos.com
     2 XIFENFEI
     3 xifenfei

  3 条记录已选择。

一.load原理性知识
1.为什么要使用LOAD
load不需要写日志(或很少日志),不做检查约束和参照完整性约束,不触发Trigger,锁的时间比较短,因此特别适合大数据量的导入.

2.load过程分为4个阶段
load/build/delete/index copy.
load阶段是将源文件parser成物理数据存储的格式,直接装入到页中,而不通过db2引擎,load阶段会检查表定义,违背定义的数据不会装入到表中.
build阶段建议索引（如果装入表有索引的话）,会检查唯一性约束,违背了唯一性的数据会在delete阶段删除.
index copy阶段将index数据从指定的临时表空间拷贝到初始的表空间里.
index copy只适应于allow read access场景.load的4个阶段会记录在messages文件里.

3.load的offline和online
缺省情况下,load过程不允许其他应用访问表,即allow no access,或叫offline load（离线加载）.Allow read access,或叫online load(在线加载）,只有在load …insert into的时候才允许使用,其他应用读到的数据是加载前的数据,load … replace into会将数据先删除,再load,只能是离线加载.

4.load表的状态
load可能出现的几种状态,某一时刻可能会同时处于几种状态.只有当表是normal状态时,表才能进行正常的增删改查操作.
normal: 正常状态
set integrity pending: 如果目标表有check约束或reference约束,那么Load后此表处于set integrity pending,表明表有约束还未检查,稍后解释.
load in progress:load正在数据加载过程中.
load pending:数据提交前出现了故障,需要通过load..terminate,load..replace或load..restart解除暂挂状态
read access only:目标表数据是可以读的,当load时指定了allow read access,那表就会处于read access only状态
unavailable:表可能被删除了或从backup中恢复了.
unknown:通过load..query命令无法得知表的状态.

二.load试验测试
需要导入数据

[db2inst2@xifenfei ~]$ more /tmp/xifenfei.data 
10,"MANAGE","MANAGE/ADVISE"
20,"ECOST ","ESTIMATE COST"
30,,"DEFINE SPECS"
40,"LEADPR","LEAD PROGRAM/DESIGN"
50,"SPECS ",
60,"LOGIC ","DESCRIBE LOGIC"
70,"CODE  ","CODE PROGRAMS"
80,"TEST  ","TEST PROGRAMS"
90,"ADMQS ","ADM QUERY SYSTEM"
100,"TEACH ","TEACH CLASSES"
110,"COURSE","DEVELOP COURSES"
60,"STAFF ","PERS AND STAFFING"
130,"OPERAT","OPER COMPUTER SYS"
140,"MAINT ","MAINT SOFTWARE SYS"
150,"ADMSYS","ADM OPERATING SYS"
160,"ADMDB ","ADM DATA BASES"
170,"ADMDC ","ADM DATA COMM"
80,"DOC   ","DOCUMENT"

一共18条记录

创建目标表

[db2inst2@xifenfei ~]$ db2 "CREATE TABLE XIFENFEI_LOAD(ACTNO SMALLINT NOT NULL primary key,
> ACTKWD CHAR(6) NOT NULL,ACTDESC VARCHAR(20) NOT NULL)"
DB20000I  The SQL command completed successfully.
[db2inst2@xifenfei ~]$ db2 list tables

Table/View                      Schema          Type  Creation time             
------------------------------- --------------- ----- --------------------------
XIFENFEI_LOAD                   DB2INST2        T     2012-04-05-18.53.42.296503

  1 record(s) selected.

[db2inst2@xifenfei ~]$ db2 describe table xifenfei_load

                                Data type                     Column
Column name                     schema    Data type name      Length     Scale Nulls
------------------------------- --------- ------------------- ---------- ----- ------
ACTNO                           SYSIBM    SMALLINT                     2     0 No    
ACTKWD                          SYSIBM    CHARACTER                    6     0 No    
ACTDESC                         SYSIBM    VARCHAR                     20     0 No    

  3 record(s) selected.

创建异常表

[db2inst2@xifenfei ~]$ db2 "create table xifenfei_exp like xifenfei_load"
DB20000I  The SQL command completed successfully.

[db2inst2@xifenfei ~]$ db2 "alter table xifenfei_exp add column ts timestamp
> add column msg clob(32k)"
DB20000I  The SQL command completed successfully.
[db2inst2@xifenfei ~]$ db2 describe table xifenfei_exp

                                Data type                     Column
Column name                     schema    Data type name      Length     Scale Nulls
------------------------------- --------- ------------------- ---------- ----- ------
ACTNO                           SYSIBM    SMALLINT                     2     0 No    
ACTKWD                          SYSIBM    CHARACTER                    6     0 No    
ACTDESC                         SYSIBM    VARCHAR                     20     0 No    
TS                              SYSIBM    TIMESTAMP                   10     0 Yes   
MSG                             SYSIBM    CLOB                     32768     0 Yes   

  5 record(s) selected.

load导入数据

[db2inst2@xifenfei ~]$ db2 "load from /tmp/xifenfei.data of del modified by dumpfile=/tmp/xifenfei.dmp
messages xifenfei.msg insert into xifenfei_load for exception xifenfei_exp"

Number of rows read         = 18
Number of rows skipped      = 0
Number of rows loaded       = 16
Number of rows rejected     = 2
Number of rows deleted      = 2
Number of rows committed    = 18

SQL3107W  There is at least one warning message in the message file.

提示一共18条记录,成功了14条,拒绝2条,删除2条

查看表中记录

[db2inst2@xifenfei ~]$ db2 "select * from xifenfei_load"

ACTNO  ACTKWD ACTDESC             
------ ------ --------------------
    10 MANAGE MANAGE/ADVISE       
    20 ECOST  ESTIMATE COST       
    40 LEADPR LEAD PROGRAM/DESIGN 
    60 LOGIC  DESCRIBE LOGIC      
    70 CODE   CODE PROGRAMS       
    80 TEST   TEST PROGRAMS       
    90 ADMQS  ADM QUERY SYSTEM    
   100 TEACH  TEACH CLASSES       
   110 COURSE DEVELOP COURSES     
   130 OPERAT OPER COMPUTER SYS   
   140 MAINT  MAINT SOFTWARE SYS  
   150 ADMSYS ADM OPERATING SYS   
   160 ADMDB  ADM DATA BASES      
   170 ADMDC  ADM DATA COMM       

  14 record(s) selected.

果真14条记录,和文件相比缺少4条记录

查看dump file

[db2inst2@xifenfei ~]$ more /tmp/xienfei.dmp.load.000 
30,,"DEFINE SPECS"
50,"SPECS ",

发现两条违背表定义记录,导入过程中,直接被拒绝的两条

查看异常表

[db2inst2@xifenfei ~]$ db2 "select * from xifenfei_exp"

ACTNO  ACTKWD ACTDESC              TS                         MSG  
------ ------ --------------------  
    60 STAFF  PERS AND STAFFING    2012-04-05-19.02.19.984440 00001I0000500001 
    80 DOC    DOCUMENT             2012-04-05-19.02.19.984440 00001I0000500001

发现两条违背唯一性约束记录,构建index的过程中删除

export导出数据

[db2inst1@xifenfei ~]$ db2 connect to sample

   Database Connection Information

 Database server        = DB2/LINUX 9.5.9
 SQL authorization ID   = DB2INST1
 Local database alias   = SAMPLE

[db2inst1@xifenfei ~]$ db2 "SELECT * FROM DB2INST1.ACT"

ACTNO  ACTKWD ACTDESC             
------ ------ --------------------
    10 MANAGE MANAGE/ADVISE       
    20 ECOST  ESTIMATE COST       
    30 DEFINE DEFINE SPECS        
    40 LEADPR LEAD PROGRAM/DESIGN 
    50 SPECS  WRITE SPECS         
    60 LOGIC  DESCRIBE LOGIC      
    70 CODE   CODE PROGRAMS       
    80 TEST   TEST PROGRAMS       
    90 ADMQS  ADM QUERY SYSTEM    
   100 TEACH  TEACH CLASSES       
   110 COURSE DEVELOP COURSES     
   120 STAFF  PERS AND STAFFING   
   130 OPERAT OPER COMPUTER SYS   
   140 MAINT  MAINT SOFTWARE SYS  
   150 ADMSYS ADM OPERATING SYS   
   160 ADMDB  ADM DATA BASES      
   170 ADMDC  ADM DATA COMM       
   180 DOC    DOCUMENT            

  18 record(s) selected.

[db2inst1@xifenfei ~]$ db2 "export to sample.act of del messages xifenfei.log 
select * from DB2INST1.ACT"

Number of rows exported: 18

[db2inst1@xifenfei ~]$ more sample.act 
10,"MANAGE","MANAGE/ADVISE"
20,"ECOST ","ESTIMATE COST"
30,"DEFINE","DEFINE SPECS"
40,"LEADPR","LEAD PROGRAM/DESIGN"
50,"SPECS ","WRITE SPECS"
60,"LOGIC ","DESCRIBE LOGIC"
70,"CODE  ","CODE PROGRAMS"
80,"TEST  ","TEST PROGRAMS"
90,"ADMQS ","ADM QUERY SYSTEM"
100,"TEACH ","TEACH CLASSES"
110,"COURSE","DEVELOP COURSES"
120,"STAFF ","PERS AND STAFFING"
130,"OPERAT","OPER COMPUTER SYS"
140,"MAINT ","MAINT SOFTWARE SYS"
150,"ADMSYS","ADM OPERATING SYS"
160,"ADMDB ","ADM DATA BASES"
170,"ADMDC ","ADM DATA COMM"
180,"DOC   ","DOCUMENT"

import导入数据

[db2inst2@xifenfei ~]$ more create.act 
CREATE TABLE ACT_COPY  (
ACTNO SMALLINT NOT NULL , 
ACTKWD CHAR(6) NOT NULL , 
ACTDESC VARCHAR(20) NOT NULL )   
IN USERSPACE1; 

[db2inst2@xifenfei ~]$ db2  -tvf create.act
CREATE TABLE ACT_COPY  ( ACTNO SMALLINT NOT NULL , ACTKWD CHAR(6) NOT NULL , ACTDESC VARCHAR(20) NOT NULL ) IN USERSPACE1
DB20000I  The SQL command completed successfully.

[db2inst2@xifenfei ~]$ db2 list tables

Table/View                      Schema          Type  Creation time             
------------------------------- --------------- ----- --------------------------
ACT_COPY                        DB2INST2        T     2012-04-05-16.40.25.103571

  1 record(s) selected.

[db2inst2@xifenfei ~]$ db2 "import from /home/db2inst1/sample.act of del 
messages xifenfei.log insert into act_copy"

Number of rows read         = 18
Number of rows skipped      = 0
Number of rows inserted     = 18
Number of rows updated      = 0
Number of rows rejected     = 0
Number of rows committed    = 18

[db2inst2@xifenfei ~]$ db2 "select * from act_copy"

ACTNO  ACTKWD ACTDESC             
------ ------ --------------------
    10 MANAGE MANAGE/ADVISE       
    20 ECOST  ESTIMATE COST       
    30 DEFINE DEFINE SPECS        
    40 LEADPR LEAD PROGRAM/DESIGN 
    50 SPECS  WRITE SPECS         
    60 LOGIC  DESCRIBE LOGIC      
    70 CODE   CODE PROGRAMS       
    80 TEST   TEST PROGRAMS       
    90 ADMQS  ADM QUERY SYSTEM    
   100 TEACH  TEACH CLASSES       
   110 COURSE DEVELOP COURSES     
   120 STAFF  PERS AND STAFFING   
   130 OPERAT OPER COMPUTER SYS   
   140 MAINT  MAINT SOFTWARE SYS  
   150 ADMSYS ADM OPERATING SYS   
   160 ADMDB  ADM DATA BASES      
   170 ADMDC  ADM DATA COMM       
   180 DOC    DOCUMENT            

  18 record(s) selected.

补充说明
1.chardel 指定字符串分隔符,默认是””
2.lobs to path　指定lob目录,modified by lobsinfile 指定保存一个文件;modified by lobsinsepfiles 指定每个值保存一个文件
3. into table_name指定表导入数据方式:inset(追加),insert_update(有主键,主键匹配更新,否则增加),replace(删除表数据,然后插入)
4.commitcount 和数据库提交相关,默认是automatic:db2内部自动计算什么时候提交
5.restartcount/skipcount N 表示跳过前N条记录,从N+1开始继续导入
6.rowcount N 表示插入条数

[db2inst2@xifenfei ~]$ db2 "import from /home/db2inst1/sample.act of del restartcount  10                               
rowcount 6  messages xifenfei.log  insert into act_copy"

Number of rows read         = 16
Number of rows skipped      = 10
Number of rows inserted     = 6
Number of rows updated      = 0
Number of rows rejected     = 0
Number of rows committed    = 16

7.插入指定列举例

[db2inst2@xifenfei ~]$ db2 "import from /home/db2inst1/sample.act of del method P(1,3) restartcount  10                               
rowcount 2  messages xifenfei.log  replace into act_copy(ACTNO,ACTDESC)"
SQL0668N  Operation not allowed for reason code "7" on table 
"DB2INST2.ACT_COPY".  SQLSTATE=57016
[db2inst2@xifenfei ~]$ db2 reorg table act_copy
DB20000I  The REORG command completed successfully.
[db2inst2@xifenfei ~]$ db2 "import from /home/db2inst1/sample.act of del method P(1,3) restartcount  10                               
rowcount 2  messages xifenfei.log  replace into act_copy(ACTNO,ACTDESC)"

Number of rows read         = 12
Number of rows skipped      = 10
Number of rows inserted     = 2
Number of rows updated      = 0
Number of rows rejected     = 0
Number of rows committed    = 12

[db2inst2@xifenfei ~]$ db2 "select * from act_copy"

ACTNO  ACTKWD ACTDESC             
------ ------ --------------------
   110 -      DEVELOP COURSES     
   120 -      PERS AND STAFFING   

  2 record(s) selected.