fix(mysql): return XA RECOVER result sets

Closes #6380

crates/dbx-core/src/db/mysql.rs

@@ -5008,6 +5008,7 @@ pub(crate) fn is_result_set_query(sql: &str, dialect: MySqlQueryDialect) -> bool
         &["SELECT", "SHOW", "DESCRIBE", "EXPLAIN", "WITH", "CALL"],
         DatabaseType::Mysql,
     ) || mysql_statement_returns_rows(sql)
+        || is_xa_recover_query(sql)
         || dialect.supports_admin_show_results && is_admin_show_query(sql)
 }
 
@@ -5038,6 +5039,11 @@ fn mysql_statement_returns_rows(sql: &str) -> bool {
     }
 }
 
+fn is_xa_recover_query(sql: &str) -> bool {
+    let tokens = leading_sql_word_tokens(sql, 2);
+    tokens.first().is_some_and(|token| token == "xa") && tokens.get(1).is_some_and(|token| token == "recover")
+}
+
 fn requires_text_protocol_query(sql: &str, dialect: MySqlQueryDialect) -> bool {
     if dialect.supports_admin_show_results && is_admin_show_query(sql) {
         return true;
@@ -5691,6 +5697,32 @@ mod tests {
         assert!(prefers_text_protocol_query("CALL proc_test1()", dialect));
     }
 
+    #[test]
+    fn mysql_xa_recover_queries_are_treated_as_text_result_sets() {
+        let dialect = MySqlQueryDialect::default();
+
+        for sql in [
+            "XA RECOVER",
+            "xa recover convert xid;",
+            "  -- inspect prepared transactions\nXa /* command */ ReCoVeR ;",
+            "# inspect prepared transactions\n/* before command */ XA\nRECOVER",
+        ] {
+            assert!(is_result_set_query(sql, dialect), "{sql}");
+            assert!(prefers_text_protocol_query(sql, dialect), "{sql}");
+        }
+
+        for sql in [
+            "XA START 'dbx_xid'",
+            "XA BEGIN 'dbx_xid'",
+            "XA END 'dbx_xid'",
+            "XA PREPARE 'dbx_xid'",
+            "XA COMMIT 'dbx_xid'",
+            "XA ROLLBACK 'dbx_xid'",
+        ] {
+            assert!(!is_result_set_query(sql, dialect), "{sql}");
+        }
+    }
+
     #[test]
     fn starrocks_admin_show_queries_are_treated_as_result_sets() {
         let sql = "ADMIN SHOW FRONTEND CONFIG LIKE '%default_replication_num%'";