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https://issues.apache.org/jira/browse/FLINK-6893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16090994#comment-16090994
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ASF GitHub Bot commented on FLINK-6893:
---------------------------------------
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.
> Add BIN supported in SQL
> ------------------------
>
> Key: FLINK-6893
> URL: https://issues.apache.org/jira/browse/FLINK-6893
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Affects Versions: 1.4.0
> Reporter: sunjincheng
> Assignee: sunjincheng
>
> BIN(N) Returns a string representation of the binary value of N, where N is a
> longlong (BIGINT) number. This is equivalent to CONV(N,10,2). Returns NULL if
> N is NULL.
> * Syntax:
> BIN(num)
> * Arguments
> **num: a long/bigint value
> * Return Types
> String
> * Example:
> BIN(12) -> '1100'
> * See more:
> ** [MySQL|
> https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_bin]
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