re-added updates accidentally removed in last commit

Author: RPG-Alex

src/dialect/mysql.rs

@@ -35,7 +35,8 @@ const RESERVED_FOR_TABLE_ALIAS_MYSQL: &[Keyword] = &[
 ];
 
 /// A [`Dialect`] for [MySQL](https://www.mysql.com/)
-#[derive(Debug, Default)]
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub struct MySqlDialect {}
 
 impl Dialect for MySqlDialect {
@@ -88,6 +89,11 @@ impl Dialect for MySqlDialect {
         true
     }
 
+    /// see <https://dev.mysql.com/doc/refman/8.4/en/comments.html>
+    fn supports_multiline_comment_hints(&self) -> bool {
+        true
+    }
+
     fn parse_infix(
         &self,
         parser: &mut crate::parser::Parser,
@@ -160,6 +166,10 @@ impl Dialect for MySqlDialect {
         true
     }
 
+    fn supports_select_modifiers(&self) -> bool {
+        true
+    }
+
     fn supports_set_names(&self) -> bool {
         true
     }
@@ -190,6 +200,11 @@ impl Dialect for MySqlDialect {
     fn supports_comment_optimizer_hint(&self) -> bool {
         true
     }
+
+    /// See: <https://dev.mysql.com/doc/refman/8.4/en/create-table.html>
+    fn supports_constraint_keyword_without_name(&self) -> bool {
+        true
+    }
 }
 
 /// `LOCK TABLES`

src/dialect/sqlite.rs

@@ -30,7 +30,8 @@ use crate::parser::{Parser, ParserError};
 /// [`CREATE TABLE`](https://sqlite.org/lang_createtable.html) statement with no
 /// type specified, as in `CREATE TABLE t1 (a)`. In the AST, these columns will
 /// have the data type [`Unspecified`](crate::ast::DataType::Unspecified).
-#[derive(Debug, Default)]
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub struct SQLiteDialect {}
 
 impl Dialect for SQLiteDialect {