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https://issues.apache.org/jira/browse/FLINK-10463?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16657797#comment-16657797
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ASF GitHub Bot commented on FLINK-10463:
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xccui commented on a change in pull request #6888: [FLINK-10463][table] Null
literal cannot be properly parsed in Java Table API function call
URL: https://github.com/apache/flink/pull/6888#discussion_r226821436
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/ExpressionParser.scala
##########
@@ -455,7 +455,7 @@ object ExpressionParser extends JavaTokenParsers with
PackratParsers {
// suffix/prefix composite
- lazy val composite: PackratParser[Expression] = over | nullLiteral |
suffixed | prefixed | atom |
+ lazy val composite: PackratParser[Expression] = over | suffixed |
nullLiteral | prefixed | atom |
Review comment:
This is documented in the TableAPI.md page. Update it correspondingly?
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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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