[FLINK-10463] Null literal cannot be properly parsed in Java Table API function call

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.6.3, 1.7.0
• Component/s: Table SQL / API
• Labels: pull-request-available
• Assignee: Hequn Cheng
• Reporter: Xingcan Cui
• Created: 29/Sep/18 11:21
• Updated: 07/Nov/18 14:34
• Resolved: 06/Nov/18 18:30

Description

For example, the expression `Null(STRING).regexpReplace('oo|ar', '')` throws the following exception.

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)

Issue Links

• links to: GitHub Pull Request #6888