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https://issues.apache.org/jira/browse/FLINK-3086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15258160#comment-15258160
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ASF GitHub Bot commented on FLINK-3086:
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Github user vasia commented on the pull request:
https://github.com/apache/flink/pull/1912#issuecomment-214762168
I'm not very familiar with the `ExpressionParser`, but I don't see anything
suspicious :)
> ExpressionParser does not support concatenation of suffix operations
> --------------------------------------------------------------------
>
> Key: FLINK-3086
> URL: https://issues.apache.org/jira/browse/FLINK-3086
> Project: Flink
> Issue Type: Bug
> Components: Table API
> Reporter: Timo Walther
> Assignee: Timo Walther
>
> The ExpressionParser of the Table API does not support concatenation of
> suffix operations. e.g.
> {code}table.select("field.cast(STRING).substring(2)"){code} throws an
> exception.
> {code}
> org.apache.flink.api.table.ExpressionException: Could not parse expression:
> string matching regex `\z' expected but `.' found
> at
> org.apache.flink.api.table.parser.ExpressionParser$.parseExpressionList(ExpressionParser.scala:224)
> {code}
> However, the Scala implicit Table Expression API supports this.
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