Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/18023#discussion_r126087546
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -847,6 +847,12 @@ object SQLConf {
.intConf
.createWithDefault(UnsafeExternalSorter.DEFAULT_NUM_ELEMENTS_FOR_SPILL_THRESHOLD.toInt)
+ val SUPPORT_QUOTED_REGEX_COLUMN_NAME =
buildConf("spark.sql.parser.quotedRegexColumnNames")
+ .doc("When true, quoted Identifiers (using backticks) in SELECT
statement are interpreted" +
--- End diff --
Is it possible users to use regex column in agg such as
`testData2.groupBy($"a", $"b").agg($"`...`")`? In analyzer, seems we process
`Star` in both `Project` and `Aggregate`.
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