[FLINK-19861] Improve the document of now() function

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.11.0
• Fix Version/s: 1.12.0
• Component/s: Documentation, Table SQL / API
• Labels: pull-request-available
• Assignee: hailong wang
• Reporter: hailong wang
• Created: 28/Oct/20 17:04
• Updated: 03/Nov/20 14:01
• Resolved: 03/Nov/20 06:28

Description

`NOW()` function is deterministic in SQL standard, but not deterministic in Flink SQL.

 We should Improve the description of `NOW()` in /dev/table/functions/systemFunctions.md.

See the email thread, 

http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/How-to-understand-NOW-in-SQL-when-using-Table-amp-SQL-API-to-develop-a-streaming-app-tc38881.html#none

Issue Links

• links to: GitHub Pull Request #13842