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https://issues.apache.org/jira/browse/PIG-4517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14511644#comment-14511644
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Daniel Dai commented on PIG-4517:
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CONCAT takes variable length parameter since 0.13.0 (PIG-3444).
> builtin UDF for mass concat of strings
> --------------------------------------
>
> Key: PIG-4517
> URL: https://issues.apache.org/jira/browse/PIG-4517
> Project: Pig
> Issue Type: New Feature
> Components: piggybank
> Reporter: Pracheer Agarwal
> Priority: Minor
>
> Right now we have CONCAT UDF which concatenate two strings. We don't have any
> UDF for mass concatenation. The functionality of the proposed udf can be
> exact reverse of STRSPLIT.
> STRSPLIT take a string and a regex and return a tuple of strings. On the same
> line MASSCONCAT can take a tuple and a delimeter as inputs and return a
> string as output.
> Example:
> Inputs - (a,b,c,d), "|"
> Output - a|b|c|d
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