Oracle外部表中的預處理器

Question

每當我將預處理器子句添加到外部表語句中時，我似乎遇到了問題。如果沒有預處理器行，它一切正常，但只要我添加它，我得到什麼樣的錯誤取決於我把它放在訪問參數塊中，它們是否必須按特定順序？我在網上找不到任何類似的問題。

編輯：另外作爲一個附註，我知道你可以使用預處理器將壓縮文件送入外部表。如果我想讀取一個壓縮文件並追加文件名，就像把它全部放在一個shell文件中一樣簡單？

CREATE TABLE (
    column1 VARCHAR2(40), 
    column2 VARCHAR2(40) 
) 
ORGANIZATION EXTERNAL 
(
    TYPE ORACLE_LOADER 
    DEFAULT DIRECTORY DMPDIR 
    ACCESS PARAMETERS(
     RECORDS DELIMITED BY NEWLINE 
     LOGFILE DMPDIR:'test.log' 
     BADFILE DMPDIR:'test.bad' 
     fields terminated by '^' 
     MISSING FIELD VALUES ARE NULL 
     REJECT ROWS WITH ALL NULL FIELDS 
     preprocessor DMPDIR: 'append_filename.sh' 
    ) 
LOCATION (DMPDIR: 'testfile.dat') 
); 

append_filename.sh

#!/bin/bash 
sed -e 's!$!,'"${1##*/}"'!' $1 

Answer 1

這裏是一個小例子來創建使用PREPROCESSOR一個external table。我這樣做對12C：

SQL> select banner from v$version where rownum = 1; 

BANNER 
---------------------------------------------------------------------------- 
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production 

SQL> DROP TABLE validation_header; 

Table dropped. 

SQL> 
SQL> CREATE TABLE validation_header (
    2 header1 VARCHAR2(5), 
    3 header2 number, 
    4 header3 VARCHAR2(8), 
    5 header4 number 
    6 ) 
    7 ORGANIZATION EXTERNAL (
    8 TYPE oracle_loader 
    9 DEFAULT DIRECTORY data_pump_dir 
10 ACCESS PARAMETERS (
11 RECORDS DELIMITED BY NEWLINE 
12 PREPROCESSOR import_ppm:'script.ksh' 
13 LOGFILE import_ppm:'script.log' 
14 FIELDS TERMINATED BY ',' 
15 (header1,header2,header3, header4 
16 )) 
17 LOCATION ('script_file.txt') 
18 ); 

Table created. 

SQL> 

從文檔，

KUP-04094: preprocessing cannot be performed if Database Vault is installed

• Cause: The Database Vault option did not permit the execution a program from an Oracle directory object.

• Action: If preprocessing must be performed, then the Database Vault option must not be installed.