Github user HuJiayin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7208#discussion_r34868236
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringOperations.scala
---
@@ -593,6 +593,33 @@ case class Levenshtein(left: Expression, right:
Expression) extends BinaryExpres
}
/**
+ * Returns string, with the first letter of each word in uppercase,
+ * all other letters in lowercase. Words are delimited by whitespace.
+ */
+case class InitCap(child: Expression) extends UnaryExpression with
ExpectsInputTypes {
+ override def dataType: DataType = StringType
+
+ override def inputTypes: Seq[DataType] = Seq(StringType)
+
+ override def nullSafeEval(string: Any): Any = {
+ if (string.asInstanceOf[UTF8String].getBytes.length == 0) {
+ return string
+ }
+ else {
+ val sb = new StringBuffer()
+ sb.append(string)
+ sb.setCharAt(0, sb.charAt(0).toUpper)
+ for (i <- 1 until sb.length) {
+ if (sb.charAt(i - 1).equals(' ')) {
+ sb.setCharAt(i, sb.charAt(i).toUpper)
+ }
+ }
+ UTF8String.fromString(sb.toString)
--- End diff --
I think conversion from byte to char will cause some extra efforts. We can
do it directly on bytes(like code below). However, I cannot assure about the
Europe special alphabets.
1. Get byte value
2. if (i == value of ñ) { // Ãñ
i = value of Ã;
}
3. Return converted value.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
