Fix STRAIGHT_JOIN constraint when table alias is absent (#1812)

Co-authored-by: Ifeanyi Ubah <ify1992@yahoo.com>

Author: killertux

src/dialect/mysql.rs

@@ -27,7 +27,12 @@ use crate::{
 
 use super::keywords;
 
-const RESERVED_FOR_TABLE_ALIAS_MYSQL: &[Keyword] = &[Keyword::USE, Keyword::IGNORE, Keyword::FORCE];
+const RESERVED_FOR_TABLE_ALIAS_MYSQL: &[Keyword] = &[
+    Keyword::USE,
+    Keyword::IGNORE,
+    Keyword::FORCE,
+    Keyword::STRAIGHT_JOIN,
+];
 
 /// A [`Dialect`] for [MySQL](https://www.mysql.com/)
 #[derive(Debug)]

tests/sqlparser_mysql.rs

@@ -3715,4 +3715,7 @@ fn parse_straight_join() {
     mysql().verified_stmt(
         "SELECT a.*, b.* FROM table_a AS a STRAIGHT_JOIN table_b AS b ON a.b_id = b.id",
     );
+    // Without table alias
+    mysql()
+        .verified_stmt("SELECT a.*, b.* FROM table_a STRAIGHT_JOIN table_b AS b ON a.b_id = b.id");
 }