[20200620]IMPDP TRANSFORM参数再探究.txt

--//前几天同事要求做一个空的测试库,要求建立与生产系统一模一样的表结构.但是如果按照通常方式建立,即使是空表,由于
--//INITIAL很大,这样消耗的磁盘空间也很大,并且建立过程并不快.我记忆里以前也遇到类似的问题,查询我的工作笔记,找到
--//如下链接:
--//http://blog.itpub.net/267265/viewspace-1846944/=> [20151126]IMPDP TRANSFORM参数.TXT

d:\> impdp help=y > aa.txt
TRANSFORM
Metadata transform to apply to applicable objects.
Valid keywords are: DISABLE_ARCHIVE_LOGGING, INMEMORY, INMEMORY_CLAUSE,
LOB_STORAGE, OID, PCTSPACE, SEGMENT_ATTRIBUTES, SEGMENT_CREATION,
STORAGE, and TABLE_COMPRESSION_CLAUSE.

--//注:12c支持更多类型,生产系统11.2.0.4.顺便测试SEGMENT_CREATION的情况.以及重复测试时一些疑问.
.
Usage: TRANSFORM = transform_name:value[:object_type]
These are the applicable transform_names

    SEGMENT_ATTRIBUTES: by default value is y which will copy the objects as it is in the export dump with all segment
    attributes. If you specify the value as n the import job will omit the segment_attributes in the dump file and it
    will use the tablespace/user default values.

    STORAGE: by default the value for this parameter is y which will include all storage clauses during the import job.
    If you specify the parameter value as n then it will omit the storage clause in the dump file and it will follow the
    default values in the tablespace.

    PCTSPACE: it is the percent multiplier for the extent allocations and size of the datafiles during the import.

    OID: object id (OID) mainly used for the TYPE objects. Each and every type is identified by OID which will be
    unique. If you create a type without specifying the OID the RDBMS itself will create and assign unique OID to the
    new TYPE object. See below examples for more details.

1.测试环境:
SCOTT@test01p> @ ver1
PORT_STRING                    VERSION        BANNER                                                                               CON_ID
------------------------------ -------------- -------------------------------------------------------------------------------- ----------
IBMPC/WIN_NT64-9.1.0           12.2.0.1.0     Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production              0

2.测试:
--//建立如下表：
CREATE TABLE SCOTT.EMPX
(
  EMPNO     NUMBER(4),
  ENAME     VARCHAR2(10 BYTE),
  JOB       VARCHAR2(9 BYTE),
  MGR       NUMBER(4),
  HIREDATE  DATE,
  SAL       NUMBER(7,2),
  COMM      NUMBER(7,2),
  DEPTNO    NUMBER(2)
)
TABLESPACE USERS
STORAGE    ( INITIAL  5M );

SCOTT@test01p> create unique index pk_empx on empx(empno);
Index created.

SCOTT@test01p>  select segment_name,bytes,blocks,INITIAL_EXTENT,NEXT_EXTENT from dba_segments where owner=user and segment_name like '%EMPX';
no rows selected

--//你可以发现这样建立的这样建立的表以及索引如果没有记录插入前,没有段的分配,这个11g段延迟建立的特性.
--//缺省deferred_segment_creation参数=TRUE.
SCOTT@test01p> show parameter defer
NAME                                 TYPE                 VALUE
------------------------------------ -------------------- ----------
deferred_segment_creation            boolean              TRUE

3.继续:
SCOTT@test01p>  insert into empx select * from emp ;
14 rows created.

SCOTT@test01p> commit ;
Commit complete.

SCOTT@test01p>  select segment_name,bytes,blocks,INITIAL_EXTENT,NEXT_EXTENT from dba_segments where owner=user and segment_name like '%EMPX';
SEGMENT_NAME              BYTES     BLOCKS INITIAL_EXTENT NEXT_EXTENT
-------------------- ---------- ---------- -------------- -----------
EMPX                    5242880        640        5242880     1048576
PK_EMPX                   65536          8          65536     1048576

--//你可以发现插入后建立表以及索引段,而且empx段INITIAL_EXTENT=5242880也就是5M.

4.导出以及导入测试:

d:\tmp> expdp scott/btbtms@test01p DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx.log tables=scott.empx CONTENT=METADATA_ONLY
Export: Release 12.2.0.1.0 - Production on Sat Jun 20 09:26:42 2020
Copyright (c) 1982, 2017, Oracle and/or its affiliates.  All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
Starting "SCOTT"."SYS_EXPORT_TABLE_01":  scott/a**@test01p DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx.log tables=scott.empx CONTENT=METADATA_ONLY
Processing object type TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/INDEX/INDEX
Master table "SCOTT"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded
******************************************************************************
Dump file set for SCOTT.SYS_EXPORT_TABLE_01 is:
  D:\TMP\EXPDP\EMPX.DMP
Job "SCOTT"."SYS_EXPORT_TABLE_01" successfully completed at Sat Jun 20 09:27:34 2020 elapsed 0 00:00:48

--//注:我加入CONTENT=METADATA_ONLY仅仅取出元数据.不包括记录.

d:\tmp> impdp scott/btbtms@test01p  DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx1.log full=y transform=SEGMENT_ATTRIBUTES:n SQLFILE=empx.txt
Import: Release 12.2.0.1.0 - Production on Sat Jun 20 09:30:21 2020
Copyright (c) 1982, 2017, Oracle and/or its affiliates.  All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
Master table "SCOTT"."SYS_SQL_FILE_FULL_01" successfully loaded/unloaded
Starting "SCOTT"."SYS_SQL_FILE_FULL_01":  scott/a**@test01p DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx1.log full=y transform=SEGMENT_ATTRIBUTES:n SQLFILE=empx.txt
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/INDEX/INDEX
Processing object type TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER
Job "SCOTT"."SYS_SQL_FILE_FULL_01" successfully completed at Sat Jun 20 09:30:34 2020 elapsed 0 00:00:10

--//查看生成的empx.txt脚本:
-- CONNECT SCOTT
ALTER SESSION SET EVENTS '10150 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10904 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '25475 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10407 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10851 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '22830 TRACE NAME CONTEXT FOREVER, LEVEL 192 ';
-- new object type path: TABLE_EXPORT/TABLE/TABLE
CREATE TABLE "SCOTT"."EMPX"
   (    "EMPNO" NUMBER(4,0),
    "ENAME" VARCHAR2(10 BYTE),
    "JOB" VARCHAR2(9 BYTE),
    "MGR" NUMBER(4,0),
    "HIREDATE" DATE,
    "SAL" NUMBER(7,2),
    "COMM" NUMBER(7,2),
    "DEPTNO" NUMBER(2,0)
   ) ;
-- new object type path: TABLE_EXPORT/TABLE/INDEX/INDEX
CREATE UNIQUE INDEX "SCOTT"."PK_EMPX" ON "SCOTT"."EMPX" ("EMPNO")
  ;

  ALTER INDEX "SCOTT"."PK_EMPX" NOPARALLEL;
-- new object type path: TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
-- new object type path: TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
-- new object type path: TABLE_EXPORT/TABLE/STATISTICS/MARKER

--//你可以发现并没有建立表或者索引SEGMENT_ATTRIBUTES的参数.可以前面的测试实际上仅仅导出元数据,按照我的理解实际上不加
--//transform=SEGMENT_ATTRIBUTES:n 命令行参数,应该也不会建立表以及索引段.而我的同事测试会建立对应的段.继续.

d:\tmp> impdp scott/btbtms@test01p  DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx2.log full=y  SQLFILE=empy.txt
Import: Release 12.2.0.1.0 - Production on Sat Jun 20 09:35:58 2020
Copyright (c) 1982, 2017, Oracle and/or its affiliates.  All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
Master table "SCOTT"."SYS_SQL_FILE_FULL_01" successfully loaded/unloaded
Starting "SCOTT"."SYS_SQL_FILE_FULL_01":  scott/a****@test01p DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx2.log full=y SQLFILE=empy.txt
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/INDEX/INDEX
Processing object type TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER
Job "SCOTT"."SYS_SQL_FILE_FULL_01" successfully completed at Sat Jun 20 09:36:07 2020 elapsed 0 00:00:06

--//查看生成的empy.txt脚本:
-- CONNECT SCOTT
ALTER SESSION SET EVENTS '10150 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10904 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '25475 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10407 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10851 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '22830 TRACE NAME CONTEXT FOREVER, LEVEL 192 ';
-- new object type path: TABLE_EXPORT/TABLE/TABLE
CREATE TABLE "SCOTT"."EMPX"
   (    "EMPNO" NUMBER(4,0),
    "ENAME" VARCHAR2(10 BYTE),
    "JOB" VARCHAR2(9 BYTE),
    "MGR" NUMBER(4,0),
    "HIREDATE" DATE,
    "SAL" NUMBER(7,2),
    "COMM" NUMBER(7,2),
    "DEPTNO" NUMBER(2,0)
   ) SEGMENT CREATION IMMEDIATE
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255
 NOCOMPRESS LOGGING
  STORAGE(INITIAL 5242880 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1
  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)
  TABLESPACE "USERS" ;
-- new object type path: TABLE_EXPORT/TABLE/INDEX/INDEX
CREATE UNIQUE INDEX "SCOTT"."PK_EMPX" ON "SCOTT"."EMPX" ("EMPNO")
  PCTFREE 10 INITRANS 2 MAXTRANS 255
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1
  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)
  TABLESPACE "USERS" PARALLEL 1 ;

  ALTER INDEX "SCOTT"."PK_EMPX" NOPARALLEL;
-- new object type path: TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
-- new object type path: TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
-- new object type path: TABLE_EXPORT/TABLE/STATISTICS/MARKER

--//注意看下划线,这样建立的表采用SEGMENT CREATION IMMEDIATE 的方式.这样即使是空表,也会分配段.
--//另外可以发现建立索引并不支持没有SEGMENT CREATION IMMEDIATE 参数.

5.可以通过一个例子验证;

SCOTT@test01p> create table xxx (a int) ;
Table created.

SCOTT@test01p> @ ddl xxx
C100
------------------------------------------------------------
  CREATE TABLE "SCOTT"."XXX"
   (    "A" NUMBER(*,0)
   ) SEGMENT CREATION DEFERRED
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255
 NOCOMPRESS LOGGING
  TABLESPACE "USERS" ;

--//SEGMENT CREATION DEFERRED

SCOTT@test01p> insert into xxx values(1);
1 row created.

SCOTT@test01p> rollback ;
Rollback complete.

SCOTT@test01p> @ ddl xxx
C100
------------------------------------------------------------------------
  CREATE TABLE "SCOTT"."XXX"
   (    "A" NUMBER(*,0)
   ) SEGMENT CREATION IMMEDIATE
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255
 NOCOMPRESS LOGGING
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1
  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)
  TABLESPACE "USERS" ;
--//SEGMENT CREATION IMMEDIATE.一旦有数据插入,建立脚本属性发生变化.

SCOTT@test01p> drop table xxx purge ;
Table dropped.

SCOTT@test01p> create table xxx (a int) SEGMENT CREATION IMMEDIATE ;
Table created.

SCOTT@test01p> create index xxxpk on xxx(a);
Index created.

SCOTT@test01p> select segment_name,bytes,blocks,INITIAL_EXTENT,NEXT_EXTENT from dba_segments where owner=user and segment_name like 'XXX%';
SEGMENT_NAME              BYTES     BLOCKS INITIAL_EXTENT NEXT_EXTENT
-------------------- ---------- ---------- -------------- -----------
XXX                       65536          8          65536     1048576
XXXPK                     65536          8          65536     1048576

--//一旦建立表属性SEGMENT CREATION IMMEDIATE,即使没有记录建立的索引也存在段的分配.

6.测试12c的SEGMENT_CREATION参数:
d:\tmp> impdp scott/btbtms@test01p  DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx3.log full=y  transform=SEGMENT_CREATION:n SQLFILE=empz.txt
Import: Release 12.2.0.1.0 - Production on Sat Jun 20 09:55:49 2020
Copyright (c) 1982, 2017, Oracle and/or its affiliates.  All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
Master table "SCOTT"."SYS_SQL_FILE_FULL_01" successfully loaded/unloaded
Starting "SCOTT"."SYS_SQL_FILE_FULL_01":  scott/a*@test01p DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx3.log full=y transform=SEGMENT_CREATION:n SQLFILE=empz.txt
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/INDEX/INDEX
Processing object type TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER
Job "SCOTT"."SYS_SQL_FILE_FULL_01" successfully completed at Sat Jun 20 09:55:59 2020 elapsed 0 00:00:07
impdp scott/btbtms@test01p  DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx3.log full=y  transform=SEGMENT_CREATION:n SQLFILE=empz.txt

--//查看生成的empz.txt脚本:
-- CONNECT SCOTT
ALTER SESSION SET EVENTS '10150 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10904 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '25475 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10407 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '10851 TRACE NAME CONTEXT FOREVER, LEVEL 1';
ALTER SESSION SET EVENTS '22830 TRACE NAME CONTEXT FOREVER, LEVEL 192 ';
-- new object type path: TABLE_EXPORT/TABLE/TABLE
CREATE TABLE "SCOTT"."EMPX"
   (    "EMPNO" NUMBER(4,0),
    "ENAME" VARCHAR2(10 BYTE),
    "JOB" VARCHAR2(9 BYTE),
    "MGR" NUMBER(4,0),
    "HIREDATE" DATE,
    "SAL" NUMBER(7,2),
    "COMM" NUMBER(7,2),
    "DEPTNO" NUMBER(2,0)
   ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255
 NOCOMPRESS LOGGING
  STORAGE(INITIAL 5242880 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  ~~~~~~~~~~~~~~~~~~~~~~~
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1
  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)
  TABLESPACE "USERS" ;
-- new object type path: TABLE_EXPORT/TABLE/INDEX/INDEX
CREATE UNIQUE INDEX "SCOTT"."PK_EMPX" ON "SCOTT"."EMPX" ("EMPNO")
  PCTFREE 10 INITRANS 2 MAXTRANS 255
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1
  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)
  TABLESPACE "USERS" PARALLEL 1 ;

  ALTER INDEX "SCOTT"."PK_EMPX" NOPARALLEL;
-- new object type path: TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
-- new object type path: TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
-- new object type path: TABLE_EXPORT/TABLE/STATISTICS/MARKER

--//STORAGE里面的参数保留,不过如果这样的表INITIAL很大,如果第1次有数据插入,那将是"灾难性",开始会很慢.

7.最后补充一点:
--//我总是忘记,朋友总是讲我忘记导入时不要导入统计信息.主要平时很少做这样的操作.
--//例子:
d:\tmp> impdp scott/btbtms@test01p  DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx4.log full=y  transform=SEGMENT_CREATION:n SQLFILE=empa.txt exclude=STATISTICS
Import: Release 12.2.0.1.0 - Production on Sat Jun 20 10:05:53 2020
Copyright (c) 1982, 2017, Oracle and/or its affiliates.  All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
Master table "SCOTT"."SYS_SQL_FILE_FULL_01" successfully loaded/unloaded
Starting "SCOTT"."SYS_SQL_FILE_FULL_01":  scott/a*@test01p DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx4.log full=y transform=SEGMENT_CREATION:n SQLFILE=empa.txt exclude=STATISTICS
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/INDEX/INDEX
Job "SCOTT"."SYS_SQL_FILE_FULL_01" successfully completed at Sat Jun 20 10:06:06 2020 elapsed 0 00:00:09

--//这样可以加快导入并且可以避免统计信息的不准确(应该导入后马上分析).也许在expdp时就可以排除掉更好.

d:\tmp> expdp scott/btbtms@test01p DIRECTORY=TMP_EXPDP dumpfile=empy.dmp logfile=empy.log tables=scott.empx CONTENT=METADATA_ONLY exclude=STATISTICS
Export: Release 12.2.0.1.0 - Production on Sat Jun 20 10:09:23 2020
Copyright (c) 1982, 2017, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
Starting "SCOTT"."SYS_EXPORT_TABLE_01":  scott/a**@test01p DIRECTORY=TMP_EXPDP dumpfile=empy.dmp logfile=empy.log tables=scott.empx CONTENT=METADATA_ONLY exclude=STATISTICS
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/INDEX/INDEX
Master table "SCOTT"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded
******************************************************************************
Dump file set for SCOTT.SYS_EXPORT_TABLE_01 is:
  D:\TMP\EXPDP\EMPY.DMP
Job "SCOTT"."SYS_EXPORT_TABLE_01" successfully completed at Sat Jun 20 10:09:42 2020 elapsed 0 00:00:17

d:\tmp> impdp scott/btbtms@test01p  DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx5.log full=y  transform=SEGMENT_CREATION:n SQLFILE=empb.txt
Import: Release 12.2.0.1.0 - Production on Sat Jun 20 10:10:39 2020
Copyright (c) 1982, 2017, Oracle and/or its affiliates.  All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
Master table "SCOTT"."SYS_SQL_FILE_FULL_01" successfully loaded/unloaded
Starting "SCOTT"."SYS_SQL_FILE_FULL_01":  scott/a***@test01p DIRECTORY=TMP_EXPDP dumpfile=empx.dmp logfile=empx5.log full=y transform=SEGMENT_CREATION:n SQLFILE=empb.txt
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/INDEX/INDEX
Processing object type TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER
Job "SCOTT"."SYS_SQL_FILE_FULL_01" successfully completed at Sat Jun 20 10:10:48 2020 elapsed 0 00:00:06

--//这样的导入实际上还是有导入统计信息的步骤.