vinoyang created FLINK-9999:
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Summary: Add ISNUMERIC supported in Table API/SQL
Key: FLINK-9999
URL: https://issues.apache.org/jira/browse/FLINK-9999
Project: Flink
Issue Type: Sub-task
Components: Table API & SQL
Reporter: vinoyang
Assignee: vinoyang
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
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