[SPARK-8653] Add constraint for Children expression for data type

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Component/s: SQL
• Assignee: Reynold Xin
• Reporter: Cheng Hao
• Shepherd: Reynold Xin
• Created: 26/Jun/15 07:00
• Updated: 09/Jul/15 06:50
• Resolved: 09/Jul/15 03:31

Description

Currently, we have trait in Expression like `ExpectsInputTypes` and also the `checkInputDataTypes`, but can not convert the children expressions automatically, except we write the new rules in the `HiveTypeCoercion`.

Issue Links

• relates to: SPARK-8752 Add ExpectsInputTypes trait for defining expected input types.
• links to: [Github] Pull Request #7034 (chenghao-intel)