[SPARK-38211] Add SQL migration guide on restoring loose upcast from string

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.2.1
• Fix Version/s: 3.1.3, 3.0.4, 3.3.0, 3.2.2
• Component/s: Documentation
• Labels: pull-request-available
• Assignee: Manu Zhang
• Reporter: Manu Zhang
• Created: 15/Feb/22 02:01
• Updated: 08/Dec/23 19:12
• Resolved: 15/Feb/22 03:55

Description

After SPARK-24586, loose upcasting from string to other types are not allowed by default. User can still set spark.sql.legacy.looseUpcast=true to preserve old behavior but it's not documented in the SQL migration guide.

Issue Links

• links to: [Github] Pull Request #35519 (manuzhang)
• links to: [Github] Pull Request #35519 (manuzhang)
• links to: GitHub Pull Request #35519