SQL*Loader之CASE9

CASE9

1. SQL脚本

[oracle@node3 ulcase]$ cat ulcase9.sql

set termout off

rem host write sys$output "Building case 9 demonstration tables.  Please wait"

drop table emp;

create table emp
       (empno number(4) not null,
        ename char(10),
        job char(9),
        mgr number(4),
        hiredate date,
        sal number(7,2),
        comm number(7,2),
        deptno number(2),
        resume clob);

exit

2. 控制文件

[oracle@node3 ulcase]$ cat ulcase9.ctl

-- Copyright (c) 1991, 2004 Oracle.  All rights reserved.
-- NAME
-- ulcase9.ctl - SQL*Loader Case Study 9: Loading LOBFILEs (CLOBs)
--
-- DESCRIPTION
-- This case study demonstrates the following:
-- Adding a CLOB column called resume to table emp.
--
-- Using a filler field (res_file).
--
-- Loading multiple LOBFILEs into the emp table.
--
-- TO RUN THIS CASE STUDY:
-- 1. Before executing this control file, log in to SQL*Plus as
--    scott/tiger. Enter @ulcase9 to execute the SQL script for
--    this case study. This prepares and populates tables and
--    then returns you to the system prompt.
--
-- 2. At the system prompt, invoke the case study as follows:
-- sqlldr USERID=scott/tiger CONTROL=ulcase9.ctl LOG=ulcase9.log
--
-- NOTES ABOUT THIS CONTROL FILE
-- This is an example of using SQL Loader to load LOBs from
-- secondary data file.
--
-- There is one file per resume (the "TERMINATED BY EOF" clause
-- indicates this) and the name of the file containing the resume
-- is in field res_file.
--
-- res_file is a filler field. The filler field is assigned values
-- from the data field to which it is mapped. This means that the
-- file name stored in the field is not loaded into any field in
-- the table.
--
-- The resume column is loaded as a CLOB. The LOBFILE function specifies
-- the field name in which the name of the file that contains data for
-- LOB field is provided.
--
-- The field name for column RESUME is in quotation marks because
-- RESUME is also a keyword for SQL*Loader. The quotation marks force
-- SQL*Loader to treat it as a column name instead.
--
LOAD DATA
INFILE *
INTO TABLE EMP
REPLACE
FIELDS TERMINATED BY ','
( EMPNO    INTEGER EXTERNAL,
  ENAME    CHAR,
  JOB      CHAR,
  MGR      INTEGER EXTERNAL,
  SAL      DECIMAL EXTERNAL,
  COMM     DECIMAL EXTERNAL,
  DEPTNO   INTEGER EXTERNAL,
  RES_FILE FILLER CHAR,
  "RESUME" LOBFILE (RES_FILE) TERMINATED BY EOF NULLIF RES_FILE = 'NONE'
)

BEGINDATA
7782,CLARK,MANAGER,7839,2572.50,,10,ulcase91.dat
7839,KING,PRESIDENT,,5500.00,,10,ulcase92.dat
7934,MILLER,CLERK,7782,920.00,,10,ulcase93.dat
7566,JONES,MANAGER,7839,3123.75,,20,ulcase94.dat
7499,ALLEN,SALESMAN,7698,1600.00,300.00,30,ulcase95.dat
7654,MARTIN,SALESMAN,7698,1312.50,1400.00,30,ulcase96.dat
7658,CHAN,ANALYST,7566,3450.00,,20,NONE

3. 数据文件

在这个案例中，最后一列RESUME是CLOB类型，它的内容以ulcase91.dat等文件存在。在这里，我们只列出其中一个数据文件，其它类似。

[oracle@node3 ulcase]$ cat ulcase91.dat

                          Resume for Mary Clark

Career Objective: Manage a sales team with consistent record breaking
                  performance.

Education:        BA Business University of Iowa 1992

Experience:       1992-1994 - Sales Support at MicroSales Inc.
                  Won "Best Sales Support" award in 1993 and 1994

                  1994-Present - Sales Manager at MicroSales Inc.
                  Most sales in mid-South division for 2 years

执行后结果：

[oracle@node3 ulcase]$ sqlplus scott/tiger @ulcase9.sql

[oracle@node3 ulcase]$ sqlldr userid=scott/tiger control=ulcase9.ctl

SQL> set long 9999
SQL> select empno,resume from emp where rownum=1;

EMPNO
-----
RESUME
--------------------------------------------------------------------------------
 7782
              Resume for Mary Clark

Career Objective: Manage a sales team with consistent record breaking
          performance.

Education:      BA Business University of Iowa 1992

Experience:      1992-1994 - Sales Support at MicroSales Inc.

EMPNO
-----
RESUME
--------------------------------------------------------------------------------
          Won "Best Sales Support" award in 1993 and 1994

          1994-Present - Sales Manager at MicroSales Inc.
          Most sales in mid-South division for 2 years

查看日志文件：

[oracle@node3 ulcase]$ cat ulcase9.log

SQL*Loader: Release 11.2.0.1.0 - Production on Fri Sep 19 03:48:24 2014

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

Control File:   ulcase9.ctl
Data File:      ulcase9.ctl
  Bad File:     ulcase9.bad
  Discard File:  none specified

 (Allow all discards)

Number to load: ALL
Number to skip: 0
Errors allowed: 50
Bind array:     64 rows, maximum of 256000 bytes
Continuation:    none specified
Path used:      Conventional

Table EMP, loaded from every logical record.
Insert option in effect for this table: REPLACE

   Column Name                  Position   Len  Term Encl Datatype
------------------------------ ---------- ----- ---- ---- ---------------------
EMPNO                               FIRST     *   ,       CHARACTER
ENAME                                NEXT     *   ,       CHARACTER
JOB                                  NEXT     *   ,       CHARACTER
MGR                                  NEXT     *   ,       CHARACTER
SAL                                  NEXT     *   ,       CHARACTER
COMM                                 NEXT     *   ,       CHARACTER
DEPTNO                               NEXT     *   ,       CHARACTER
RES_FILE                             NEXT     *   ,       CHARACTER
  (FILLER FIELD)
"RESUME"                          DERIVED     *  EOF      CHARACTER
    Dynamic LOBFILE.  Filename in field RES_FILE
    NULL if RES_FILE = 0X4e4f4e45(character 'NONE')

Table EMP:
  7 Rows successfully loaded.
  0 Rows not loaded due to data errors.
  0 Rows not loaded because all WHEN clauses were failed.
  0 Rows not loaded because all fields were null.

Space allocated for bind array:                 132096 bytes(64 rows)
Read   buffer bytes: 1048576

Total logical records skipped:          0
Total logical records read:             7
Total logical records rejected:         0
Total logical records discarded:        0

Run began on Fri Sep 19 03:48:24 2014
Run ended on Fri Sep 19 03:48:25 2014

Elapsed time was:     00:00:00.45
CPU time was:         00:00:00.11