Github user wuchong commented on a diff in the pull request:
https://github.com/apache/flink/pull/4128#discussion_r127866461
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/functions/ScalarFunctions.scala
---
@@ -82,4 +82,24 @@ object ScalarFunctions {
}
sb.toString
}
+
+ /**
+ * Returns a string representation of the binary value of N, Returns
NULL if N is NULL.
+ */
+ def bin(n: Long): String = {
+ if (null == n) {
+ return null
+ }
+ val value = new Array[Byte](64)
+ var num = n
+ // Extract the bits of num into value[] from right to left
+ var len: Int = 0
+ do {
+ len += 1
+ value(value.length - len) = ('0' + (num & 1)).toByte
+ num >>>= 1
+ } while (num != 0)
--- End diff --
Use `Long.toBinaryString(long)` to parse it.
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