blocks|key|1359657|text|有些事情你不会使用SED，我会说这就是其中之一。尝试将python脚本与re库一起使用，或者仅使用普通的字符串操作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1359658|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

There are somethings you don't use SED for, I'd say this is one of those things. Try using a python script with the re library or just plain string manipulation.

blocks|key|5298557|text|我认为这段C%2B%2B代码可以满足您的需求。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5298558|//+$+g%2B%2B+-Wall+-Wextra+-std=c%2B%2B11+main.cpp

#include+<iostream>

int+main(int,+char*[])+{
++bool+str+=+false;
++char+c;
++std::ios_base::sync_with_stdio(false);
++std::cin.tie(nullptr);
++while+(std::cin.get(c))+{
++++if+(c+==+'%7C')+{
++++++if+(str)+{
++++++++std::cout+<<+'\\';+}+}
++++else+if+(c+==+'"')+{
++++++//+Toggle+string+parsing.
++++++str+=+!str;+}
++++else+if+(c+==+'\\')+{
++++++//+Skip+escaped+chars.
++++++std::cout+<<+c;
++++++std::cin.get(c);+}
++++std::cout+<<+c;+}
++return+0;+}|code-block|syntax|javascript|5298559|本例中sed的问题在于，为了跟踪您所处的状态(字符串或非字符串)，您需要了解更多的基础知识。|5298560|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I think this C++ code does what you need.

<pre><code>// $ g++ -Wall -Wextra -std=c++11 main.cpp

#include &lt;iostream&gt;

int main(int, char*[]) {
 bool str = false;
 char c;
 std::ios_base::sync_with_stdio(false);
 std::cin.tie(nullptr);
 while (std::cin.get(c)) {
 if (c == '|') {
 if (str) {
 std::cout &lt;&lt; '\\'; } }
 else if (c == '"') {
 // Toggle string parsing.
 str = !str; }
 else if (c == '\\') {
 // Skip escaped chars.
 std::cout &lt;&lt; c;
 std::cin.get(c); }
 std::cout &lt;&lt; c; }
 return 0; }
</code></pre>

The problem with sed in this example is you need to know more than the basics in order to track which state you are in (string or not).

blocks|key|5298581|text|下面是一个脚本，用于将具有管道分隔值的文件转换为遵循TSV文件的更简单约定的文件。它假设有可用的PHP解释器。如果脚本被另存为psv2tsv，并且可以在Mac或Linux环境中执行，那么psv2tsv+-h应该提供更多细节。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5298582|示例用法(在输出中使用<TAB>表示制表符)：|5298583|$+psv2tsv+<<<+$'73779087%7C"UCGr4c0_zShyHbctxJJrJ03w"%7C"ItsMattSpeaking+%7C+SuPra"'
+73779087<TAB>UCGr4c0_zShyHbctxJJrJ03w<TAB>ItsMattSpeaking+%7C+SuPra<TAB>

$+psv2tsv+<<<+$'a%7C"b%7Cc\t\d"%7C"e\n"'
a<TAB>b%7Cc\t\d<TAB>e\n<TAB>|code-block|syntax|javascript|5298584|脚本：|5298585|#!/usr/bin/env+php

<?php
#+Author:+pkoppstein+at+gmail.com+12/2015
#+Use+at+your+own+risk.
#+Input+-+pipe-separated+values+along+the+lines+of+CSV.
#+Translate+embedded+newline+and+tab+characters.

function+help()+{
++global+$argv;
++echo+<<<EOT
Syntax:+{$argv[0]}+[filepath]

Convert+a+file+or+stream+of+records+with+pipe-separated+values+to+the
TSV+(tab-separated+value)+format.++If+no+argument+is+specified,+or+if
filepath+is+specified+as+-,+then+input+is+taken+from+stdin.

The+input+is+assumed+to+be+like+a+CSV+file+but+with+pipe+characters
(%7C)+used+instead+of+commas.++The+output+follows+the+simpler
conventions+of+TSV+files.

Note+that+each+tab+in+the+input+is+translated+to+"\\t",+and+each
embedded+newline+is+translated+to+"\\n".++Each+translated+record+is
then+written+to+stdout.++See+PHP's+fgetcsv+for+further+details.

EOT;
}

$file+=+($argc+>+1+)+?+$argv[1]+:+'php://stdin';

if+(+$file+==+"-h"+or++$file+==+"--help"+)+{
+++++++++help();
+++++++++exit;
}
if+(+$file+==+"-"+)+$file+=+'php://stdin';

$handle+=+@fopen($file,+"r");
if+($handle)+{
++while+(($data+=+fgetcsv($handle,0,"%7C"))+!==+FALSE)+{
++++$num+=+count($data);
++++for+($c=0;+$c+<+$num;+$c%2B%2B)+{
++++++#+str_replace(+mixed+$search+,+mixed+$replace+,+mixed+$subject+[,+int+&$count+]+)
++++++echo+str_replace("\t",+"\\t",+str_replace("\n",+"\\n",+$data[$c]))+.+"\t";
++++}
++++echo+"\n";
++}
++fclose($handle);
+}+
+else+{
+++echo+"{$argv[0]}:+unable+to+fopen+$argv[1]\n";
+++exit(1);
}
?>|5298586|entityMap^0|2L|A|0|B|5|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|Y|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|Z|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|Q|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|R|$]]

Here's a script for translating a file with pipe-separated values, as described, to one following the simpler conventions of a TSV file. It assumes the availability of a PHP interpreter. If the script is saved as psv2tsv and made executable in a Mac or Linux environment, then <code>psv2tsv -h</code> should offer more details.

Example usage (using <code>&lt;TAB&gt;</code> to indicate a TAB in the output):

<pre><code>$ psv2tsv &lt;&lt;&lt; $'73779087|"UCGr4c0_zShyHbctxJJrJ03w"|"ItsMattSpeaking | SuPra"'
 73779087&lt;TAB&gt;UCGr4c0_zShyHbctxJJrJ03w&lt;TAB&gt;ItsMattSpeaking | SuPra&lt;TAB&gt;

$ psv2tsv &lt;&lt;&lt; $'a|"b|c\t\d"|"e\n"'
a&lt;TAB&gt;b|c\t\d&lt;TAB&gt;e\n&lt;TAB&gt;
</code></pre>

<h3>The script:</h3>

<pre><code>#!/usr/bin/env php

&lt;?php
# Author: pkoppstein at gmail.com 12/2015
# Use at your own risk.
# Input - pipe-separated values along the lines of CSV.
# Translate embedded newline and tab characters.

function help() {
 global $argv;
 echo &lt;&lt;&lt;EOT
Syntax: {$argv[0]} [filepath]

Convert a file or stream of records with pipe-separated values to the
TSV (tab-separated value) format. If no argument is specified, or if
filepath is specified as -, then input is taken from stdin.

The input is assumed to be like a CSV file but with pipe characters
(|) used instead of commas. The output follows the simpler
conventions of TSV files.

Note that each tab in the input is translated to "\\t", and each
embedded newline is translated to "\\n". Each translated record is
then written to stdout. See PHP's fgetcsv for further details.

EOT;
}

$file = ($argc &gt; 1 ) ? $argv[1] : 'php://stdin';

if ( $file == "-h" or $file == "--help" ) {
 help();
 exit;
}
if ( $file == "-" ) $file = 'php://stdin';

$handle = @fopen($file, "r");
if ($handle) {
 while (($data = fgetcsv($handle,0,"|")) !== FALSE) {
 $num = count($data);
 for ($c=0; $c &lt; $num; $c++) {
 # str_replace( mixed $search , mixed $replace , mixed $subject [, int &amp;$count ] )
 echo str_replace("\t", "\\t", str_replace("\n", "\\n", $data[$c])) . "\t";
 }
 echo "\n";
 }
 fclose($handle);
 } 
 else {
 echo "{$argv[0]}: unable to fopen $argv[1]\n";
 exit(1);
}
?&gt;
</code></pre>

blocks|key|1359681|text|这可能适用于您(GNU+sed)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1359682|sed+-r+':a;s/%5E([%5E"]*("[%5E"%7C]*"[%5E"]*)*"[%5E"%7C]*)\%7C/\1/g;ta'+file|code-block|syntax|javascript|1359683|这将删除双引号中的%7C，但它不支持带引号的引号，因此要小心！|offset|length|style|CODE|1359684|entityMap^0|0|0|9|1|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

This might work for you (GNU sed):

<pre><code>sed -r ':a;s/^([^"]*("[^"|]*"[^"]*)*"[^"|]*)\|/\1/g;ta' file
</code></pre>

This removes <code>|</code> within double quotes however it does not cater for quoted quotes, so beware!

I have a data file I am trying to import into redshift (postgress mpp database). I am trying to import into postgres with a '|' delimiter. But some data, has the '|' in the string data itself, for example :

<pre><code>73779087|"UCGr4c0_zShyHbctxJJrJ03w"|"ItsMattSpeaking | SuPra" 
</code></pre>

So I tried this sed command :

<pre><code>sed -i -E "s/(.+|)(.+|)|/\1\2\\|/g" inputfile.txt &gt;outputfile.txt
</code></pre>

Any ideas on what is wrong with the sed command, to replace the | in the last string with a \| escape character so that Redshift will not view this as a delimiter ? Any help is appreciated.

sed command not working ...how to strip a pipe out

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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