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https://issues.apache.org/jira/browse/FLINK-10463?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16676277#comment-16676277
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ASF GitHub Bot commented on FLINK-10463:
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xccui commented on issue #6888: [FLINK-10463][table] Null literal cannot be
properly parsed in Java Table API function call
URL: https://github.com/apache/flink/pull/6888#issuecomment-436155099
Thanks for the response @twalthr.
@hequn8128, thanks for your contribution, I'll merge this.
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> Null literal cannot be properly parsed in Java Table API function call
> ----------------------------------------------------------------------
>
> Key: FLINK-10463
> URL: https://issues.apache.org/jira/browse/FLINK-10463
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Reporter: Xingcan Cui
> Assignee: Hequn Cheng
> Priority: Major
> Labels: pull-request-available
>
> For example, the expression `Null(STRING).regexpReplace('oo|ar', '')` throws
> the following exception.
> {code:java}
> org.apache.flink.table.api.ExpressionParserException: Could not parse
> expression at column 13: string matching regex
> `(?i)\Qas\E(?![_$\p{javaJavaIdentifierPart}])' expected but `.' found
> Null(STRING).regexpReplace('oo|ar', '')
> ^
> at
> org.apache.flink.table.expressions.ExpressionParser$.throwError(ExpressionParser.scala:576)
> at
> org.apache.flink.table.expressions.ExpressionParser$.parseExpression(ExpressionParser.scala:569)
> {code}
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