[FLINK-10222] Table scalar function expression parses error when function name equals the exists keyword suffix

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.3, 1.5.5, 1.6.2, 1.7.0
• Component/s: Table SQL / API
• Labels: pull-request-available
• Assignee: vinoyang
• Reporter: vinoyang
• Created: 27/Aug/18 09:45
• Updated: 19/Sep/19 19:18
• Resolved: 05/Nov/18 22:52

Description

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

Issue Links

• links to: GitHub Pull Request #6622