[FLINK-9999] Add ISNUMERIC supported in Table API/SQL

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Won't Do
• Component/s: Table SQL / API
• Labels: pull-request-available
• Assignee: vinoyang
• Reporter: vinoyang
• Created: 31/Jul/18 07:18
• Updated: 19/Sep/19 19:18
• Resolved: 03/Nov/18 11:47

Description

ISNUMERIC function used to verify a expression is a valid numberic type.

documentation : https://docs.microsoft.com/en-us/sql/t-sql/functions/isnumeric-transact-sql?view=sql-server-2017

Issue Links

• links to: GitHub Pull Request #6473