[SPARK-19446] Remove unused findTightestCommonType in TypeCoercion

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.2.0
• Fix Version/s: 2.2.0
• Component/s: SQL
• Assignee: Hyukjin Kwon
• Reporter: Hyukjin Kwon
• Created: 03/Feb/17 12:33
• Updated: 12/Dec/22 17:51
• Resolved: 04/Feb/17 06:10

Description

It seems the codes below is not used anymore.

  /**
   * Find the tightest common type of a set of types by continuously applying
   * `findTightestCommonTypeOfTwo` on these types.
   */
  private def findTightestCommonType(types: Seq[DataType]): Option[DataType] = {
    types.foldLeft[Option[DataType]](Some(NullType))((r, c) => r match {
      case None => None
      case Some(d) => findTightestCommonTypeOfTwo(d, c)
    })
  }

Issue Links

• links to: [Github] Pull Request #16786 (HyukjinKwon)