mvzink commented on code in PR #1739:
URL: 
https://github.com/apache/datafusion-sqlparser-rs/pull/1739#discussion_r1968070815


##########
src/ast/mod.rs:
##########
@@ -798,9 +798,15 @@ pub enum Expr {
         kind: CastKind,
         expr: Box<Expr>,
         data_type: DataType,
-        // Optional CAST(string_expression AS type FORMAT 
format_string_expression) as used by BigQuery
-        // 
https://cloud.google.com/bigquery/docs/reference/standard-sql/format-elements#formatting_syntax
+        /// Optional CAST(string_expression AS type FORMAT 
format_string_expression) as used by [BigQuery]
+        ///
+        /// [BigQuery]: 
https://cloud.google.com/bigquery/docs/reference/standard-sql/format-elements#formatting_syntax
         format: Option<CastFormat>,
+        /// Whether this was parsed as a [MySQL]-style cast, which has a 
different syntax for

Review Comment:
   I simplified this patch to take that approach and not introduce the error 
path for MySQL (leaving existing permissive parsing in place, since I noticed 
that's already the approach taken with other datatypes and dialects).



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