diff options
| -rw-r--r-- | sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SparkSQLParser.scala | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SparkSQLParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SparkSQLParser.scala index b198ed9936..f1a1ca6616 100644 --- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SparkSQLParser.scala +++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SparkSQLParser.scala @@ -97,10 +97,10 @@ class SqlLexical(val keywords: Seq[String]) extends StdLexical { /** Generate all variations of upper and lower case of a given string */ def allCaseVersions(s: String, prefix: String = ""): Stream[String] = { - if (s == "") { + if (s.isEmpty) { Stream(prefix) } else { - allCaseVersions(s.tail, prefix + s.head.toLower) ++ + allCaseVersions(s.tail, prefix + s.head.toLower) #::: allCaseVersions(s.tail, prefix + s.head.toUpper) } } |