You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@flink.apache.org by "sunjincheng (JIRA)" <ji...@apache.org> on 2017/06/15 07:47:00 UTC
[jira] [Created] (FLINK-6925) Add CONCAT/CONCAT_WS supported in SQL
sunjincheng created FLINK-6925:
----------------------------------
Summary: Add CONCAT/CONCAT_WS supported in SQL
Key: FLINK-6925
URL: https://issues.apache.org/jira/browse/FLINK-6925
Project: Flink
Issue Type: Sub-task
Components: Table API & SQL
Affects Versions: 1.4.0
Reporter: sunjincheng
CONCAT(str1,str2,...)Returns the string that results from concatenating the arguments. May have one or more arguments. If all arguments are nonbinary strings, the result is a nonbinary string. If the arguments include any binary strings, the result is a binary string. A numeric argument is converted to its equivalent nonbinary string form.
CONCAT() returns NULL if any argument is NULL.
* Syntax:
CONCAT(str1,str2,...)
* Arguments
** str1,str2,... -
* Return Types
string
* Example:
CONCAT('F', 'lin', 'k') -> 'Flink'
CONCAT('M', NULL, 'L') -> NULL
CONCAT(14.3) -> '14.3'
* See more:
** [MySQL| https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_concat]
CONCAT_WS() stands for Concatenate With Separator and is a special form of CONCAT(). The first argument is the separator for the rest of the arguments. The separator is added between the strings to be concatenated. The separator can be a string, as can the rest of the arguments. If the separator is NULL, the result is NULL.
* Syntax:
CONCAT_WS(separator,str1,str2,...)
* Arguments
** separator -
** str1,str2,... -
* Return Types
string
* Example:
CONCAT_WS(',','First name','Second name','Last Name') -> 'First name,Second name,Last Name'
* See more:
** [MySQL| https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_concat-ws]
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)