lewiszlw commented on code in PR #10573:
URL: https://github.com/apache/datafusion/pull/10573#discussion_r1609550161


##########
datafusion/sql/src/unparser/dialect.rs:
##########
@@ -15,19 +15,33 @@
 // specific language governing permissions and limitations
 // under the License.
 
-/// Dialect is used to capture dialect specific syntax.
+use regex::Regex;
+use sqlparser::keywords::ALL_KEYWORDS;
+
+/// `Dialect` to use for Unparsing
+///
+/// The default dialect tries to avoid quoting identifiers unless necessary 
(e.g. `a` instead of `"a"`)
+/// but this behavior can be overridden as needed
 /// Note: this trait will eventually be replaced by the Dialect in the 
SQLparser package
 ///
 /// See <https://github.com/sqlparser-rs/sqlparser-rs/pull/1170>
 pub trait Dialect {
     fn identifier_quote_style(&self) -> Option<char>;
+    fn identifier_needs_quote(&self, _: &str) -> bool {

Review Comment:
   Above note said this trait will eventually be replaced by the Dialect in the 
SQLparser package. Seems this pr make this harder. Should we extend sqlparser 
`Dialect` using something like `DialectExt` trait?



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