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

[Shang Yuanchun (Jira)]

Xingcan Cui created FLINK-10463:
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             Summary: 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


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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