[
https://issues.apache.org/jira/browse/FLINK-10463?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16673973#comment-16673973
]
ASF GitHub Bot commented on FLINK-10463:
----------------------------------------
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-435572138
Sorry for the late response @hequn8128. As illustrated in [this
stackoverflow
question](https://stackoverflow.com/questions/26453870/scala-packratparsers-does-not-backtrack-as-it-should),
patterns reordering could be the proper way to deal with this problem. +1 to
your solution.
BTW, @twalthr, it seems that the doc for expression syntax in `TableAPI.md`
has not been maintained for a long time. As the syntax being more and more
complicated, do you think we should still keep them “strongly consistent” with
the codes?
----------------------------------------------------------------
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:
[email protected]
> 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}
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
