Package org.apache.pig.piggybank.evaluation.string

Class Summary

HashFNV	Syntax: long HashFNV(String string_to_hash, [int mod]).
HashFNV1	Implementation for HashFNV which takes 1 parameter
HashFNV2	Implementation for HashFNV which takes 2 parameter
INDEXOF	string.INDEXOF implements eval function to search for a string Example: register pigudfs.jar; A = load 'mydata' as (name); B = foreach A generate string.INDEXOF(name, ","); dump B;
LASTINDEXOF	string.INSTR implements eval function to search for the last occurrence of a string Returns null on error Example: register pigudfs.jar; A = load 'mydata' as (name); B = foreach A generate string.LASTINDEXOF(name, ","); dump B;
LcFirst	lower-case the first character of a string
LENGTH	string.LENGTH implements eval function to find length of a string Example: register piggybank.jar; A = load 'mydata' as (name); B = foreach A generate string.LENGTH(name); dump B;
LookupInFiles	Syntax: int lookupInFiles(String expression,...
LOWER	string.LOWER implements eval function to convert a string to lower case Example: register pigudfs.jar; A = load 'mydata' as (name); B = foreach A generate string.LOWER(name); dump B;
RegexExtract	Syntax: String RegexExtract(String expression, String regex, int match_index). Input: expression-source string. regex-regular expression. match_index-index of the group to extract. Output: extracted group, if fail, return null.
RegexExtractAll	Syntax: String RegexExtractAll(String expression, String regex). Input: expression-source string. regex-regular expression. Output: A tuple of matched strings.
RegexMatch	Syntax: int RegexMatch(String expression, String regex). Output: return 1 if expression contains regex, 0 otherwise.
REPLACE	string.REPLACE implements eval function to replace part of a string.
Reverse
Split	Wrapper around Java's String.split input tuple: first column is assumed to have a string to split; the optional second column is assumed to have the delimiter or regex to split on; if not provided, it's assumed to be '\s' (space) the optional third column may provide a limit to the number of results. If limit is not provided, 0 is assumed, as per Java's split().
SUBSTRING	string.SUBSTRING implements eval function to get a part of a string.
Trim
UcFirst	upper-case the first character of a string
UPPER	string.UPPER implements eval function to convert a string to upper case Example: register pigudfs.jar; A = load 'mydata' as (name); B = foreach A generate string.UPPER(name); dump B;