iffyio commented on code in PR #1865:
URL: 
https://github.com/apache/datafusion-sqlparser-rs/pull/1865#discussion_r2131627748


##########
tests/sqlparser_common.rs:
##########
@@ -9132,7 +9132,9 @@ fn test_create_index_with_with_clause() {
 #[test]
 fn parse_drop_index() {
     let sql = "DROP INDEX idx_a";
-    match verified_stmt(sql) {
+    // MySql dialect doesn't support `DROP INDEX idx_a`,you need to specify a 
specific table, please refer:
+    // [MySql](https://dev.mysql.com/doc/refman/8.4/en/drop-index.html)
+    match all_dialects_except(|d| d.is::<MySqlDialect>()).verified_stmt(sql) {

Review Comment:
   not sure I followed the intent here, from the code in this PR the parser 
doesnt seem to have started rejecting any `DROP INDEX` statement variants 
specifically for mysql, so that I imagined these should still have been passing 
for mysql?



##########
src/ast/ddl.rs:
##########
@@ -187,6 +187,14 @@ pub enum AlterTableOperation {
     DropForeignKey {
         name: Ident,
     },
+    /// `DROP INDEX <index_name>`
+    ///
+    /// Note: this is a [MySQL]-specific operation.
+    ///

Review Comment:
   ```suggestion
   ```
   I think we can skip the note, since we're already linking to the mysql docs 
below



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