[jira] [Created] (ARROW-12567) [C++][Gandiva] Implement LPAD and RPAD functions for string input values

["João Pedro Antunes Ferreira (Jira)" <ji...@apache.org>]

João Pedro Antunes Ferreira created ARROW-12567:
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             Summary: [C++][Gandiva] Implement LPAD and RPAD functions for string input values
                 Key: ARROW-12567
                 URL: https://issues.apache.org/jira/browse/ARROW-12567
             Project: Apache Arrow
          Issue Type: New Feature
          Components: C++ - Gandiva
            Reporter: João Pedro Antunes Ferreira
            Assignee: João Pedro Antunes Ferreira


Implement LPAD and RPAD functions for string input values.
 * LPAD([string] basetext, [number] x, [optional string] padtext)
 * RPAD([string] basetext, [number] x, [optional string] padtext)

lpad - Prepends padtext to basetext in a way that allows as many characters as possible from padtext given an output string length of x. When x is less than or equal to the length of basetext, only characters from basetext are printed in the output. If padtext is omitted then spaces are prepended.

rpad - Appends padtext to basetext in a way that allows as many characters as possible from padtext given an output string length of x. When x is less than or equal to the length of basetext, only characters from basetext are printed in the output. If padtext is omitted then spaces are appended.



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