[SPARK-45627] Fix `symbol literal is deprecated`

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0
• Component/s: Connect, GraphX, MLlib, Spark Core, SQL
• Labels: pull-request-available
• Assignee: Pan Bingkun
• Reporter: Yang Jie
• Created: 22/Oct/23 17:34
• Updated: 23/Oct/23 14:50
• Resolved: 23/Oct/23 14:49

Description

For the code `val symbol = 'symbol`, it's a compile warning in Scala 2.13, but it's a compile error in Scala 3.

• Scala 2.13 

 

Welcome to Scala 2.13.12 (OpenJDK 64-Bit Server VM, Java 17.0.8).
Type in expressions for evaluation. Or try :help.
scala> val symbol = 'symbol
                    ^
       warning: symbol literal is deprecated; use Symbol("symbol") instead [quickfixable]
val symbol: Symbol = Symbol(symbol) 

 

 

• Scala 3

 

Welcome to Scala 3.3.1 (17.0.8, Java OpenJDK 64-Bit Server VM).
Type in expressions for evaluation. Or try :help.
                                                                                                                                                                                                                                                    
scala> val symbol = 'symbol
-- Error: ----------------------------------------------------------------------
1 |val symbol = 'symbol
  |             ^
  |symbol literal 'symbol is no longer supported,
  |use a string literal "symbol" or an application Symbol("symbol") instead,
  |or enclose in braces '{symbol} if you want a quoted expression.
  |For now, you can also `import language.deprecated.symbolLiterals` to accept
  |the idiom, but this possibility might no longer be available in the future. 

 

Issue Links

• relates to: SPARK-34443 Replace symbol literals with Symbol constructor invocations to comply with Scala 2.13
• relates to: SPARK-38351 [TESTS] Replace 'abc symbols with Symbol("abc") in tests
• links to: GitHub Pull Request #43487