Zhong Yu created CALCITE-2273:
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Summary: <Unicode 6 digit escape value> misinterpreted
Key: CALCITE-2273
URL: https://issues.apache.org/jira/browse/CALCITE-2273
Project: Calcite
Issue Type: Bug
Reporter: Zhong Yu
Assignee: Julian Hyde
The following string literal is accepted by Calcite parser, but the result
value in Java is incorrect
{code:java}
U&'\+01F600'{code}
Cause: currently, SqlLiteral.unescapeUnicode() only intends to handle 4-digit
unicode escape value in the form of \xyzw . When given the 6-digit form
\+xyzwrs, it parses the first four chars "+xyz" as a hexadecimal, which
succeeds too. Therefore the result value contains 4 characters: [\u0xyz, w, r,
s]
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