Github user janewangfb commented on a diff in the pull request:
https://github.com/apache/spark/pull/18023#discussion_r118159701
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/ParserUtils.scala
---
@@ -177,6 +177,12 @@ object ParserUtils {
sb.toString()
}
+ /** the column name pattern in quoted regex without qualifier */
+ val escapedIdentifier = "`(.+)`".r
+
+ /** the column name pattern in quoted regex with qualifier */
+ val qualifiedEscapedIdentifier = ("(.+)" + """.""" + "`(.+)`").r
--- End diff --
when the config is on, we need to extract XYZ from `XYZ` pattern, thats why
we need these patterns.
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