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ASF GitHub Bot commented on FLINK-9999: --------------------------------------- yanghua commented on a change in pull request #6473: [FLINK-9999] [table] Add ISNUMERIC supported in Table API/SQL URL: https://github.com/apache/flink/pull/6473#discussion_r209441509 ########## File path: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/stringExpressions.scala ########## @@ -358,6 +358,29 @@ case class Rpad(text: Expression, len: Expression, pad: Expression) } } +case class IsNumeric(child: Expression) extends UnaryExpression with InputTypeSpec { + + override private[flink] def expectedTypes: Seq[TypeInformation[_]] = Seq(STRING_TYPE_INFO) + + override private[flink] def resultType: TypeInformation[_] = INT_TYPE_INFO + + override private[flink] def validateInput(): ValidationResult = { + if (child.resultType == STRING_TYPE_INFO) { Review comment: Here I think of it as a string type scalar function, the value represented by this string can be int/bigInt/double and so on. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org > 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 > Priority: Major > Labels: pull-request-available > > 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 -- This message was sent by Atlassian JIRA (v7.6.3#76005)