[GitHub] [spark] MaxGekk commented on a diff in pull request #43152: [SPARK-45361][SQL][DOCS] Describe characters unescaping in string literals

["MaxGekk (via GitHub)" <gi...@apache.org>]

MaxGekk commented on code in PR #43152:
URL: https://github.com/apache/spark/pull/43152#discussion_r1340216443


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docs/sql-ref-literals.md:
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@@ -51,6 +51,20 @@ A string literal is used to specify a character string value.
 
     Case insensitive, indicates `RAW`. If a string literal starts with `r` prefix, neither special characters nor unicode characters are escaped by `\`.
 
+The following escape sequences are recognized in regular string literals (without the `r` prefix), and replaced according to the following rules:
+- `\0` -> `\u0000`, unicode character with the code 0;
+- `\'` -> `'`, skip the slash before `'`;
+- `\"` -> `"`, skip the slash before `"`;

Review Comment:
   I think we can remove this cases because they duplicate the default case. In the PR, I removed them: https://github.com/apache/spark/pull/43170



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