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

• Type: New Feature
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 5.0.0
• Component/s: C++ - Gandiva
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/28326
• Assignee: João Pedro Antunes Ferreira
• Reporter: João Pedro Antunes Ferreira
• Created: 27/Apr/21 13:22
• Updated: 11/Jan/23 08:27
• Resolved: 07/Jun/21 10:33

Description

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.

Issue Links

• links to: GitHub Pull Request #10173
• links to: GitHub Pull Request #10178
• links to: GitHub Pull Request #10179