hequn8128 commented on a change in pull request #6671: [FLINK-10281] [table]
Fix string literal parsing in Table API
URL: https://github.com/apache/flink/pull/6671#discussion_r216206820
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/ExpressionParser.scala
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@@ -185,13 +185,18 @@ object ExpressionParser extends JavaTokenParsers with
PackratParsers {
}
}
- lazy val singleQuoteStringLiteral: Parser[Expression] =
- ("'" + """([^'\p{Cntrl}\\]|\\[\\'"bfnrt]|\\u[a-fA-F0-9]{4})*""" + "'").r
^^ {
- str => Literal(str.substring(1, str.length - 1))
- }
+ // string with single quotes such as 'It''s me.'
+ lazy val singleQuoteStringLiteral: Parser[Expression] = "'((?:''|[^'])*)'".r
^^ {
Review comment:
Should we also add `?:` in the outer matches? Same for
`doubleQuoteStringLiteral `.
((?:''|[^'])*)-> (?:(?:''|[^'])*)
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