yanghua commented on a change in pull request #6432: [FLINK-9970] [table] Add
ASCII/CHR function for table/sql API
URL: https://github.com/apache/flink/pull/6432#discussion_r226526582
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/functions/ScalarFunctions.scala
##########
@@ -266,6 +268,21 @@ object ScalarFunctions {
regexp_extract(str, regex, 0)
}
+ /**
+ * Returns the ASCII code value of the leftmost character of the string str.
+ */
+ def ascii(str: String): Integer = {
+ if (str == null || str.equals("")) {
+ 0
+ } else {
+ if (CharMatcher.ASCII.matches(str.charAt(0))) {
+ str.charAt(0).toByte.toInt
+ } else {
+ 0
Review comment:
Hi @xccui I tried to change the value of this method that originally
returned 0 to null, but both related tests throw NPE, I don't know if it is
related to Integer. Can you try it?
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