[PIG-3342] Allow conditions in case statement

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.12.0
• Component/s: parser
• Assignee: Cheolsoo Park
• Reporter: Cheolsoo Park
• Created: 02/Jun/13 18:53
• Updated: 14/Oct/13 16:46
• Resolved: 04/Jun/13 16:06

Description

PIG-3268 added case statement support. But conditions are currently not allowed in when branches. For example,

CASE
  WHEN i % 5 == 0 THEN '5n'
  WHEN i % 5 == 1 THEN '5n+1'
  WHEN i % 5 == 2 THEN '5n+2'
  WHEN i % 5 == 3 THEN '5n+3'
  ELSE                 '5n+4'
END

This is invalid now. However, it will be useful if it's allowed.

Issue Links

• is related to: PIG-3268 Case statement support
• is related to: PIG-3280 Document IN operator and CASE expression