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https://issues.apache.org/jira/browse/FLINK-9853?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16569466#comment-16569466
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ASF GitHub Bot commented on FLINK-9853:
---------------------------------------
xueyumusic commented on a change in pull request #6337: [FLINK-9853] [table]
Add HEX support
URL: https://github.com/apache/flink/pull/6337#discussion_r207736696
##########
File path: docs/dev/table/sql.md
##########
@@ -1664,6 +1664,17 @@ BIN(numeric)
</td>
</tr>
+ <tr>
+ <td>
+{% highlight text %}
+HEX(numeric)
+HEX(string)
+ {% endhighlight %}
+ </td>
+ <td>
+ <p>Returns a string representation of an integer numeric value or a
string in hex format. Returns null if numeric is null. E.g. "20" leads to "14",
"100" leads to "64", "hello,world" leads to "68656c6c6f2c776f726c64".</p>
Review comment:
Thanks @walterddr , I clarify the doc adding explicit explain `for numeric`
or `for string`
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> add hex support in table api and sql
> ------------------------------------
>
> Key: FLINK-9853
> URL: https://issues.apache.org/jira/browse/FLINK-9853
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: xueyu
> Priority: Major
> Labels: pull-request-available
>
> like in mysql, HEX could take int or string arguments, For a integer argument
> N, it returns a hexadecimal string representation of the value of N. For a
> string argument str, it returns a hexadecimal string representation of str
> where each byte of each character in str is converted to two hexadecimal
> digits.
> Syntax:
> HEX(100) = 64
> HEX('This is a test String.') = '546869732069732061207465737420537472696e672e'
> See more: [link
> MySQL|https://dev.mysql.com/doc/refman/8.0/en/string-functions.html#function_hex]
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