iffyio commented on code in PR #1576:
URL: 
https://github.com/apache/datafusion-sqlparser-rs/pull/1576#discussion_r1874372151


##########
tests/sqlparser_redshift.rs:
##########
@@ -353,3 +380,23 @@ fn test_parse_json_path_from() {
         _ => panic!(),
     }
 }
+
+#[test]
+fn test_parse_select_numbered_columns() {
+    // An alias starting with a number
+    redshift_and_generic().verified_stmt(r#"SELECT 1 AS "1" FROM a"#);
+    redshift_and_generic().verified_stmt(r#"SELECT 1 AS "1abc" FROM a"#);
+}
+
+#[test]
+fn test_parse_nested_quoted_identifier() {
+    redshift().verified_stmt(r#"SELECT 1 AS ["1"] FROM a"#);
+    redshift().verified_stmt(r#"SELECT 1 AS [ " 1 " ]"#);

Review Comment:
   Oh yeah I think that the linked test would be incorrect as well? from what I 
could tell and tested the following seemed to all be equivalent in redshift
   ```sql
   SELECT 1 AS foo;
   SELECT 1 AS [ foo ];
   SELECT 1 AS [ "foo" ];
   ```
   so that whitespace within the brackets isn't part of the identifier. Then it 
would be incorrect to have an identifier in the AST that contains the string ` 
foo ` for any of the above.
   
   On the other hand this would actually be referencing an identifier 
containing whitespace
   ```sql
   SELECT 1 AS [" foo "];
   ```
   



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