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https://issues.apache.org/jira/browse/FLINK-10222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16616459#comment-16616459
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ASF GitHub Bot commented on FLINK-10222:
----------------------------------------
fhueske commented on a change in pull request #6622: [FLINK-10222] [table]
Table scalar function expression parses error when function name equals the
exists keyword suffix
URL: https://github.com/apache/flink/pull/6622#discussion_r217892719
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/ExpressionParser.scala
##########
@@ -42,7 +42,8 @@ object ExpressionParser extends JavaTokenParsers with
PackratParsers {
// Convert the keyword into an case insensitive Parser
implicit def keyword2Parser(kw: Keyword): Parser[String] = {
- ("""(?i)\Q""" + kw.key + """\E""").r
+ ("""(?i)\Q""" + kw.key +
+
"""\E(?![_$a-zA-Z0-9\u005f\u0024\u0061-\u007a\u0041-\u005a\u0030-\u0039])""").r
Review comment:
I'll replace `a-zA-Z0-9\u005f\u0024\u0061-\u007a\u0041-\u005a\u0030-\u0039`
by `\p{javaJavaIdentifierPart}` which matches all valid characters of Java
identifiers.
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> Table scalar function expression parses error when function name equals the
> exists keyword suffix
> -------------------------------------------------------------------------------------------------
>
> Key: FLINK-10222
> URL: https://issues.apache.org/jira/browse/FLINK-10222
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Reporter: vinoyang
> Priority: Major
> Labels: pull-request-available
>
> Suffix extraction in ExpressionParser.scala does not actually support
> extraction of keywords with the same prefix. For example: Adding suffix
> parsing rules for {{a.fun}} and {{a.function}} simultaneously will causes
> exceptions.
> some discussion :
> [https://github.com/apache/flink/pull/6432#issuecomment-416127815]
> https://github.com/apache/flink/pull/6585#discussion_r212797015
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