MySQL: CREATE INDEX: allow USING clause before ON (#2029)

tests/sqlparser_common.rs

@@ -17252,6 +17252,49 @@ fn parse_invisible_column() {
     }
 }
 
+#[test]
+fn parse_create_index_different_using_positions() {
+    let sql = "CREATE INDEX idx_name USING BTREE ON table_name (col1)";
+    let expected = "CREATE INDEX idx_name ON table_name USING BTREE (col1)";
+    match all_dialects().one_statement_parses_to(sql, expected) {
+        Statement::CreateIndex(CreateIndex {
+            name,
+            table_name,
+            using,
+            columns,
+            unique,
+            ..
+        }) => {
+            assert_eq!(name.unwrap().to_string(), "idx_name");
+            assert_eq!(table_name.to_string(), "table_name");
+            assert_eq!(using, Some(IndexType::BTree));
+            assert_eq!(columns.len(), 1);
+            assert!(!unique);
+        }
+        _ => unreachable!(),
+    }
+
+    let sql = "CREATE INDEX idx_name USING BTREE ON table_name (col1) USING HASH";
+    let expected = "CREATE INDEX idx_name ON table_name USING BTREE (col1) USING HASH";
+    match all_dialects().one_statement_parses_to(sql, expected) {
+        Statement::CreateIndex(CreateIndex {
+            name,
+            table_name,
+            columns,
+            index_options,
+            ..
+        }) => {
+            assert_eq!(name.unwrap().to_string(), "idx_name");
+            assert_eq!(table_name.to_string(), "table_name");
+            assert_eq!(columns.len(), 1);
+            assert!(index_options
+                .iter()
+                .any(|o| o == &IndexOption::Using(IndexType::Hash)));
+        }
+        _ => unreachable!(),
+    }
+}
+
 #[test]
 fn test_parse_alter_user() {
     verified_stmt("ALTER USER u1");