LucaCappelletti94 opened a new pull request, #2299:
URL: https://github.com/apache/datafusion-sqlparser-rs/pull/2299

   This is the first PR in a chain adding PostgreSQL XML function support 
(split from #2252).
   
   - Add xml `<foo/>` typed string support for PostgreSQL and Generic dialects, 
parsing it as `Expr::TypedString` (same mechanism used by DATE '...', TIME 
'...', etc.)
   - Introduce `supports_xml_expressions()` dialect method (default false, true 
for PostgreSQL and Generic) per reviewer feedback to avoid `dialect_of!`
   - Add `is_simple_unquoted_object_name` helper for matching single unquoted 
identifiers in `DataType::Custom`


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