Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/18023#discussion_r123901234 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala --- @@ -1191,6 +1191,12 @@ class Dataset[T] private[sql]( def col(colName: String): Column = colName match { case "*" => Column(ResolvedStar(queryExecution.analyzed.output)) + case ParserUtils.escapedIdentifier(columnNameRegex) --- End diff -- @janewangfb Based on the above comment from @cloud-fan and @hvanhovell , how about creating a new function `colRegex`? `spark.sql.parser.quotedRegexColumnNames` can be defined as a SQL Parser specific configuration. That configuration will not affect the new function `colRegex`.
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