hive中 regexp_replace的用法,替换特殊字符问题

数据仓库中有的字段不合格,有特殊字符,比如换行符。

poi_name
\n19013
\n12013

怎么把换行符替换掉呢?

https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-StringOperators

regexp_replace(string INITIAL_STRING, string PATTERN, string REPLACEMENT)

Returns the string resulting from replacing all substrings in INITIAL_STRING that match the java regular expression syntax defined in PATTERN with instances of REPLACEMENT. For example, regexp_replace("foobar", "oo|ar", "") returns 'fb.' Note that some care is necessary in using predefined character classes: using '\s' as the second argument will match the letter s; '\s' is necessary to match whitespace, etc.

官网说用两个反斜杠代替一个,即一个反斜杠用来转义。

实践了一下,不行,得4个

select regexp_replace(poi_name,'\\\\n','') 

poi_name
19013
12013
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