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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "Hive/LanguageManual/UDF" by RaghothamMurthy
Date Thu, 02 Jul 2009 17:30:52 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.

The following page has been changed by RaghothamMurthy:
http://wiki.apache.org/hadoop/Hive/LanguageManual/UDF

------------------------------------------------------------------------------
  ||string ||ltrim(string A) ||returns the string resulting from trimming spaces from the
beginning(left hand side) of A e.g. ltrim(' foobar ') results in 'foobar '||
  ||string ||rtrim(string A) ||returns the string resulting from trimming spaces from the
end(right hand side) of A e.g. rtrim(' foobar ') results in ' foobar'||
  ||string ||regexp_replace(string A, string B, string C) ||returns the string resulting from
replacing all substrings in B that match the Java regular expression syntax(See Java regular
expressions syntax) with C e.g. regexp_replace('foobar', 'oo|ar', '') returns 'fb'||
+ ||string ||regexp_extract(string subject, string pattern, int intex) ||returns the string
extracted using the pattern. e.g. regexp_extract('foothebar', 'foo(.*?)(bar)', 2) returns
'bar'||
  ||string ||get_json_object(string json_string, string path) ||Extract json object from a
json string based on json path specified, and return json string of the extracted json object.
It will return null if the input json string is invalid||
  
  ==== get_json_object ====

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