[PIG-4490] MIN/MAX builtin UDFs return wrong results when accumulating for strings

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.12.0, 0.13.0, 0.14.0
• Fix Version/s: 0.15.0
• Component/s: internal-udfs
• Patch Info: Patch Available
• Hadoop Flags: Reviewed
• Assignee: xplenty
• Reporter: xplenty
• Created: 01/Apr/15 08:35
• Updated: 07/Jun/15 03:47
• Resolved: 22/May/15 22:14

Description

When using MIN/MAX UDFs with strings in a job that uses the accumulator interface the results are wrong - The UDF won't return the correct MIN/MAX value.

this is caused by a reverse 'GreaterThan/SmallerThan" (<>) sign in the accumulate() function of both StringMin/StringMax UDFs.