[SPARK-24891] Fix HandleNullInputsForUDF rule

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.1
• Fix Version/s: 2.3.2, 2.4.0
• Component/s: SQL
• Assignee: Wei Xue
• Reporter: Wei Xue
• Created: 23/Jul/18 18:00
• Updated: 25/Jul/18 04:07
• Resolved: 25/Jul/18 02:41

Description

The HandleNullInputsForUDF rule can generate new If node infinitely, thus causing problems like match of SQL cache missed. 

Issue Links

• links to: [Github] Pull Request #21851 (maryannxue)
• links to: [Github] Pull Request #21869 (gatorsmile)