Question

我已将 notrim 包含在外部表格中的 rowdata 列中，作为Alex的建议（这是this问题的延续，）

但现在End of Line字符也附加在rowdata列，我的意思是，行尾（CR-LF）也在rowdata的末尾加入。

我不想使用substr（）或translate（），因为文件大小约为1GB，

我的外部表创建过程：

'CREATE TABLE ' || rec.ext_table_name || ' (ROW_DATA VARCHAR2(4000)) ORGANIZATION EXTERNAL ' ||
     '(TYPE ORACLE_LOADER DEFAULT DIRECTORY ' || rec.dir_name || ' ACCESS ' || 'PARAMETERS (RECORDS ' ||
     'DELIMITED by NEWLINE NOBADFILE NODISCARDFILE ' ||
     'FIELDS REJECT ROWS WITH ALL NULL FIELDS (ROW_DATA POSITION(1:4000) char)) LOCATION (' || l_quote ||
     'temp.txt' || l_quote || ')) REJECT LIMIT UNLIMITED'

是否可以添加任何其他参数，以删除行尾字符。感谢。

编辑1：

我的档案：

在末尾有一些空格的第一行一些第二行，末尾有空格

我的Ext表：

Some first line with spaces at end    <EOL>
Some second line with spaces at end   <EOL>

更清楚，我将在java中解释（当我将列值赋给字符串时，它就像下面这样），

没有notrim：

rowdata[1]="Some first line with spaces at end";
rowdata[2]="Some second line with spaces at end";

with notrim：

rowdata[1]="Some first line with spaces at end    \n";
rowdata[2]="Some second line with spaces at end   \n";

我想要的是：

rowdata[1]="Some first line with spaces at end    ";
rowdata[2]="Some second line with spaces at end   ";

分隔符也是rowdata的一部分，因为没有指定修剪。

EDIT2：

行结尾：CRLF

平台：

Oracle Database 12c企业版12.1.0.1.0版 - 64位

生产PL / SQL版本12.1.0.1.0 - 生产

“CORE 12.1.0.1.0生产”TNS for Solaris ：版本12.1.0.1.0 -

生产NLSRTL版本12.1.0.1.0 - 生产

SELECT DUMP（ROW_DATA，1016）FROM EXT_TABLE WHERE ROWNUM = 1;

Typ = 1 Len = 616 CharacterSet = AL32UTF8： 41,30,30,30,30,30,30,30,30,30,30,31,30,30,30,30,37,36,36,36,44,30,30,30,30， 31,32,35,30,38,31,36,32,35,30,38,31,36,31,33,34,37,30,39,44,42,20,41,30,36， 31,30,30,30,30,30,30,30,30,30,30,30,30,32,30,30,4d，59,52,20,32,5a，20,30,31， 36,30,30,30,31,32,31,32,33,34,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30， 30,52,49,42,46,50,58,30,30,30,31,30,30,30,30,30,30,30,30,31,30,36,32,38,30， 31,30,32,30,30,47,20,20,20,20,53,20,20,30,30,30,30,30,30,30,30,30,30,30,20， 20,20,20,20,20,20,4e，39,32,37,32,20,20,20,20,20,20,30,30,30,30,30,20,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,30,30,39,39,38,54,45,53,54,52,52,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,54,45,53， 54,4f，50,44,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,54,45,53,54,54,52,41,4e， 53,49,44,20,20,20,20,20,2 0,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,54,45,53,54,52,52,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,54,45,53， 54,4f，50,44,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20， 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,54,45,53,54,54,52,41,4e， 53,49,44,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20， 20,20,20,20,20,20,20，d

Len应为615

Answer 1

您的文件行结尾是CRLF（建议在Windows中创建文件？），但您的数据库在Solaris上运行。正如the documentation所说：

如果指定了DELIMITED BY NEWLINE，则使用的实际值是特定于平台的。在UNIX平台上，NEWLINE被假定为“\ n”。在Windows操作系统上，NEWLINE被假定为“\ r \ n”。

由于您的数据库平台是Unix，因此只使用LF（\n）作为记录分隔符。您可以更改文件中的分隔符，也可以更改terminated by子句以查找Windows行结尾：

,,,
records delimited by "\r\n" nobadfile ...

如果您可能获得任何类型的行结尾但无法控制的文件，您可以添加preprocessor step来删除任何存在的文件。如果您创建一个可执行脚本文件，可以在与该文件相同的目录中，或者（如Oracle建议的那样）在另一个可访问Oracle的目录中，例如名为remove_cr，其中包含：

/usr/bin/sed -e "s/\\r$//" $1

你可以在外部表定义中添加对它的调用，并保留newline temrinator：

...
records delimited by newline nobadfile nodiscardfile
preprocessor 'remove_cr'
...

请务必阅读文档中的安全警告。

使用带有CRLF行结尾的temp.txt文件进行演示：

create table t42_ext (
  row_data varchar2(4000)
)
organization external
(
  type oracle_loader default directory d42 access parameters
  (
    records delimited by newline nobadfile nodiscardfile
    preprocessor 'remove_cr'
    fields reject rows with all null fields
    (
      row_data position(1:4000) char notrim
    )
  )
  location ('temp.txt')
)
reject limit unlimited;

select '<'|| row_data ||'>' from t42_ext;

'<'||ROW_DATA||'>'                                                             
--------------------------------------------------------------------------------
<Line1sometext       >                                                          
<Line2sometext       >                                                          
<Line3sometext       >

删除EOL分隔符以插入外部表-oracle

1 个答案: