[ARROW-11617] [C++][Gandiva] Fix nested if-else optimisation in gandiva

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0.0
• Component/s: C++ - Gandiva
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/27482
• Assignee: Projjal Chanda
• Reporter: Projjal Chanda
• Created: 13/Feb/21 05:12
• Updated: 11/Jan/23 08:20
• Resolved: 15/Feb/21 09:52

Description

In gandiva, when we have nested if-else statements we reuse the local bitmap and treat it is a single logical if - elseif - .. - --else condition. However, when he have say another function between them like
IF
THEN
ELSE
   function(
     IF
     THEN
     ELSE
  )

in such cases also currently we are doing same thing which can lead to incorrect results

Issue Links

• links to: GitHub Pull Request #9486