Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18023#discussion_r125144859
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -847,6 +847,11 @@ 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, a SELECT statement can take regex-based column
specification.")
--- End diff --
We also need to explain the impact in the description. For example,
> When true, quoted Identifiers (using backticks) are interpreted as
regular expressions.
Feel free to input the above text
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