[HUDI-4946] merge into with no preCombineField has dup row in only insert

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.12.2
• Component/s: spark-sql
• Labels: pull-request-available
• Assignee: KnightChess
• Reporter: KnightChess
• Created: 29/Sep/22 02:41
• Updated: 08/Nov/22 21:56
• Resolved: 08/Nov/22 21:56

Description

a table with precombineField use diff merge into sql has different result.

If merge sql with matchAction will have no dup key result, but when merge sql only has insertAction will have dup result if we not set `hoodie.combine.before.insert=true`.

I think merge into for the same table need has consistent behavior.

Issue Links

• links to: GitHub Pull Request #6824